研究论文

• Comparative Study on Photosynthetic Characteristics between Almond andPeach
• Pan Xiaoyun;Cao Qindong;Wang Genxuan;and Yang Xiaoyan
• Acta Horticulturae Sinica. 2002, 29(5): 403-407.
• Abstract ( 1407 ) HTML ( 1470 ) PDF (220KB) ( 1470 ) 　　　
• The photosynthetic characteristics of introduced almond (Prunus amygdalus cv.‘Nonpareil’) were studied in comparison with peach (Prunus persica cv.‘Qingfeng’). The curves of diurnal variation of net photosynthesis rate (Pn) in leaves of almond and peach showed two peaks , occurring at 11∶00 and 15∶00 , respectively. Midday depressions of Pn (11∶00 - 14∶00) were found in leaves of both almond and peach. Pn of almond leaves was significantly higher than that of peach between 10∶00 - 15∶00. Some physioecological parameters showed significant differences between almond and peach. The optimum temperature for Pn in almond and peach is 27 ℃and 23 ℃, respectively. The light compensation and saturation point of Pn in almond and peach leaves were 54μmol·m^-2·s^-1 and 1714μmol·m^-2·s^-1, 23μmol·m^-2·s^-1 and 1479μmol·m^-2·s^-1, respectively. The CO₂ compensation
  and saturation point of Pn in almond and peach leaves were 68 μL·L^-1 and 838μL·L^-1, 55μL·L^-1 and 717μL·L^-1, respectively. The optimum degree of humidity for Pn in almond and peach is ≤0. 89 kPa and ≤1. 31 kPa. And the results of diurnal variations of chlorophyll fluorescence showed that Fv’/ Fm’、qP and ΦPS Ⅱin leaves of almond were significant higher than those of peach , and qN was lower than that of peach.
  
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• A Study on the Causative Factors Retarding Pigmentation in the Fruit of‘Feizixiao’Litchi
• Wang Huicong;Huang Xuming;and Huang Huibai
• Acta Horticulturae Sinica. 2002, 29(5): 408-412.
• Abstract ( 1422 ) HTML ( 1577 ) PDF (155KB) ( 1577 ) 　　　
• Two litchi cultivars , well-colored‘Nuomici’and poor2colored‘Feizixiao’, were used to investigate peel pigments and chloroplast structure during fruit maturation and to examine the bagging effects. Coloration of ‘Feizixiao’seriously lagged behind sugar accumulation , the colored area was below 18 % when sugar accumulation peaked. High chlorophyll concentration in the pericarp of‘Feizixiao’, which intensified the ground color , masked
  the display of anthocyanins as a surface color. In addition , high chlorophyll concentration interfered the synthesis of anthocyanins. These facts clearly indicated that high concentration and slow degradation of chlorophylls were the main causative factor impeding the surface color development in‘Feizixiao’. Bagging fruit clusters with adhesive bonded fabric effectively reduced the content of chlorophylls and hence improved the development and display of surface color.
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• Studies on the Certification of Musa ABB group Dajiao , M. AAB group Fenjiaoand M. AAB group Longyajiao by AFLP
• Yi Ganjun;Yu Xiaoying;Huo Heqiang;Tan Weiping;Huang Ziran;Chen Dacheng;and Huang Bingzhi
• Acta Horticulturae Sinica. 2002, 29(5): 413-417.
• Abstract ( 2319 ) HTML ( 1186 ) PDF (223KB) ( 1186 ) 　　　
• AFLP analysis revealed that an abundant genetic diversity existed among Musa ABB group Fenjiao, Musa ABB group Dajiao and Musa AAB group Longyajiao. UPGMA analysis showed that 32 Fenjiao , Dajiao and Longyajiao cultivars were divided into 6 groups including 3 groups made of single cultivar. Group Ⅰ(Musa ABB group Dajiao) were divided into three subgroups. Group Ⅱ (Musa ABB group Fenjiao) included three subgroups. Musa
  AAB group Longyajiao (Group Ⅲ) were divided into two subgroups. The results showed that Fenjiao , Dajiao , and Longyajiao can not be divided into AAB or ABB group simply because of the abundant genetic diversity existed among them. It will not be able to reflect the genetic relationships among Fenjiao , Dajiao and Longyajiao. There was very significant difference between Fenjiao and Dajiao. It is inappropriate to set Fenjiao and Dajiao into the same ABB group according to Simmonds’system.
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• Special Wild Fruit Tree Germplasm and Its Distribution in Yunnan
• Tang Kaixue;Li Xuelin;Zhang Wenbing;Qian Jinliang;and Jiang Huiqiong
• Acta Horticulturae Sinica. 2002, 29(5): 418-422.
• Abstract ( 2094 ) HTML ( 2050 ) PDF (112KB) ( 2050 ) 　　　
• Abundant wild fruit tree resources are preserved in complicated natural environment of Yunnan. There are more than 500 species according to the preliminary statistics , among which 164 special species are only found in Yunnan province compared with other provinces of China and belong to 35 families and 54 genera. Most of them are tropical fruit tree or berry fruit tree. There form three distribution centers of special wild fruit tree in Yunnan : South-Southeast of Yunnan , west-northwest of Yunnan , and center-northeast of Yunnan. The properties of the wild fruit tree resources are attractive and the utilization is extensive. Further research on exploitation will be carried out .
  
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• Changes of Photosynthetic Characteristics and Response to Rising CO₂Concentration in Strawberry in Solar Greenhouse
• Su Peixi;Du Mingwu;Zhang Lixin;Bi Yurong;Zhao Aifen;and Liu Xinmin
• Acta Horticulturae Sinica. 2002, 29(5): 423-426.
• Abstract ( 1603 ) HTML ( 2423 ) PDF (192KB) ( 2423 ) 　　　
• The LI-6400 Portable Photosynthesis System of LI-COR was used to study the photosynthetic characteristics of strawberry and its response to the rising CO₂ concentration at the full2fruit stage in the solar greenhouse. The results showed that the daily variation of net photosynthetic rate in leaves presented a bimodal curve and an obvious‘midday depression’phenomenon occurred. The first peak value was the highest , which occurred
  at about 10 : 00 am , the net photosynthetic rate was CO₂ 13. 1μmol·m^-2·s^-1, the second peak value occurred at 16 : 00 pm , the net photosynthetic rate was CO₂ 9. 5μmol ·m^-2·s^-1. The main reason for the midday
  depression was stomatal factors.At midday ,light intensity was the largest ,vapor pressure deficit between leaves and air as well as stomatal limiting value reached maximum but air relative humidity , stomatal conductance and intercellular CO₂ concentration reached minimum and hence occurred photosynthetic midday depression. When light intensity reached 1 000μmol ·m^-2·s^-1 and CO₂ concentration was lower than 600μmol ·mol^-1, its net photosynthetic rate was higher than that of the much higher light intensity.At such light intensity the CO₂ saturation point was 943. 3μmol·mol ^-1 and CO₂ compensation point was 91. 7μmol·mol^-1.
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• Effects of Shading on Photosynthesis and Yield of Tomato Plants at DifferentGrowth Stages
• Liu Xianzhao;and Kang Shaozhong
• Acta Horticulturae Sinica. 2002, 29(5): 427-732.
• Abstract ( 1721 ) HTML ( 1550 ) PDF (226KB) ( 1550 ) 　　　
• This paper studied the effects of three levels of shading (no shading, 75% shading and 40% shading) for 8 days on tomato leaf photosynthesis, drymatter partitioning and yield formation at three growth stages 1i. e. early flowering (EF) , peak flowering (PF) , late flowering (LF) 2. Different effects caused by shading at different growth stages were found. Shading caused a higher increase in stomatal conductance and intercellular CO₂ concentration at all three growth stages compared with unshaded plants, significantly reduced the midday net photosynthetic rates at most days of the EF stage, but the photosynthetic rates in 40%2shaded leaves at PF stage were increased gradually depending on the length of the shading time. This trend become more obvious and the average photosynthetic rates during a 82day shading period in 40% shading treated leaves was increased by 22% at
  the LF stage. The 75% shading treatment reduced the drymass of root and stem tissues at the EF and PF stages, while the 40% shading region increased root dry mass and stem dry mass by 43% and 22% compared with the unshaded treatment at the LF stage. The influence of shading on the dry mass of leaves was very small at most growth stages. A 40% shading treatment at the LF stage significantly enhanced the fruit yield, but failed to affect the fruit yield at the EF stage. The results showed that tomato could growwell and a better yield could be obtained if some moderate shading ( i. e. 40% shading) was applied at the LF stage in the summer midday time.
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• Effect of Available Silicon in Soil on Cucumber Seed Germination and SeedlingGrowth Metabolism
• Li Qingfang and Ma Chengcang
• Acta Horticulturae Sinica. 2002, 29(5): 433-437.
• Abstract ( 1739 ) HTML ( 1548 ) PDF (202KB) ( 1548 ) 　　　
• Cucumber plants were cultured in flowerpot for the investigation of the effect of available silicon in soil on cucumber seed germination and seedling growth metabolism. The result showed that when the content of available silicon in soil was between 55. 1 and 202. 8 mg·kg^-1, with the increase of available silicon in soil , the activities of protease and lipase during cucumber seed germination were promoted , the respiration rate of seedlings was accelerated , and seed vigor was increased ; the photosynthesis rate , root activities and nitrate reductase activity of cucumber seedlings during seedlings growth were increased. The transpiration rate was decreased , while transpiration ratio and leaf water content were increased. From the facts above , it can be shown that silicon which was assimilated in soil improved nutrition metabolism of cucumber seed and seedling. As a result , seed germination and seedling growth rate were advanced. The investigation showed that the highest content of available silicon in soil which can increasingly promote seed germination and seedling growth rate was 202. 8 mg·kg^-1.
  
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• Identification of Double Triplo-3, 6 and Acquisition of Primary Triplo-3 andTriplo-6 in Chinese Cabbage
• Shen Shuxing;Li Zhenqiu;Zhang Chenghe;Wang Yanhua;and Chen Xueping
• Acta Horticulturae Sinica. 2002, 29(5): 438-442.
• Abstract ( 1826 ) HTML ( 1589 ) PDF (233KB) ( 1589 ) 　　　
• An autotetraploid Chinese cabbage 〔Brassica campestris ssp. pekinensis (Rupr.) Olsson〕microspore line 940521 was designated as double triplo23 , 6 by mitotic chromosome karyotype analysis. By meiosis metaphase Ⅰchromosome observation , triplo23 , triplo26 and double triplo23 , 6 were identified in the F₁ of line 940521 ×Guan 291. The transmission of extra chromosomes in double triplo23 , 6 was calculated and the result
  showed that the rates of No. 3 and No. 6 chromosome were 28. 26 % and 47. 83 % respectively. The pollens of triplo23 , triplo26 and double triplo23 , 6 were stained with TTC and their activities were measured. The result
  showed that the differences of pollen activity among triplo23 , triplo26 and double triplo23 , 6 were significant at 0. 01 level .
  
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• Genetic Analysis of Some Seedling Characters in Protected Cucumber
• Gu Xingfang;Zhang Chunzhen;Feng Linlin;Fang Xiujuan;and Zhang Tianming
• Acta Horticulturae Sinica. 2002, 29(5): 443-446.
• Abstract ( 1343 ) HTML ( 1098 ) PDF (171KB) ( 1098 ) 　　　
• Six cucumber inbred lines for protected cultivation were used as materials in the experiment . The genetic analysis of some seedling characters , including cotyledon area , true leaf area , fresh mass above-ground were
  conducted by using complete diallel crossing (without reciprocal crossing) . Results showed that the inheritances of cotyledon area , true leaf area and fresh mass above2ground were mainly dominant effect . The broad heritabilities of themwere 93. 3 % , 97. 2 % and 94. 3 % , while the narrow heritabilities of them were 35. 3 % , 43. 7 % and 52. 9 % respectively. However , the inheritances of plant height and plumular axis length were mainly additive effect . The broad heritabilities of them were 98. 2 % and 97. 8 % , while the narrow heritabilities of them were 78. 2 % and 87. 6 % respectively. The genes controlling these characters might be oligogene or oligogenome.
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• Chromosome Location of the Mutant Gene curl in Pea
• Liu Fuzhong and Gostimskii S. A.
• Acta Horticulturae Sinica. 2002, 29(5): 447-450.
• Abstract ( 1651 ) HTML ( 941 ) PDF (152KB) ( 941 ) 　　　
• A set of 5 chromosome translocation lines and two marker gene line chl-7 and Viola were used in testing the chromosome location of curl mutant gene in pea. The results indicated that mutant gene curl was located on the long arm of the chromosome 3 in pea, between the known yellow green leaf gene chl-7 and the rugose peri carp gene r, their order is r-curl (chl-7) . The interchange values of curl to chl-7 and r are 34. 24%±4. 57% and 19. 79%±3. 55% .
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• Effect of Arbuscular Mycorrhizal Fungi on Micropagated Taro (Colocasia esculenta Schott. )
• Li Min;Liu Pengqi;and Liu Runjin
• Acta Horticulturae Sinica. 2002, 29(5): 451-453.
• Abstract ( 1410 ) HTML ( 1144 ) PDF (93KB) ( 1144 ) 　　　
• Influence of arbuscular mycorrhizal (AM) fungi , Gigaspora rosea Nicolson & Schenck , Glomus mosseae (Nicol . & Gerd. ) Gerdemann & Trappe and Glomus versiforme (Karsten) on transplanting survive rate , mineral nutrients , photosynthesis , and growth of Colocasia esculenta was investigated under the condition of green-house. Results showed that the inoculation with AMfungi enhanced the survive rate , increased the contents of N , P , K, Cu and Zn et al . in the tissue of roots and leaves of the plant and improved photosynthetic rate and the growth. It was concluded that inoculation with AMfungi should be one of important biological techniques for micro-propagated plants.
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• Changes of Soluble Sugars, Pr and POD Activities in the Early DevelopingOvaries of Three Gourd Crops
• Liu Shiqi and Xing Yuxian
• Acta Horticulturae Sinica. 2002, 29(5): 454-456.
• Abstract ( 1333 ) HTML ( 1054 ) PDF (150KB) ( 1054 ) 　　　
• The changes of soluble sugars , soluble proteins (Pr) and POD activities in the early developing ovaries were studied by using cucumber (Cucumis sativum L. ) , watermelon (Citrullus lanatus Mansfeld) and pumpkin (Cucurbita pepo L. ) as sample in this experiment . The result indicated : in normal fruiting ovaries , contents of soluble sugars and soluble proteins increased about 50 % , or 1. 0 times during 0 - 4 days after bloom , respectively; POD activities decreased markedly during 0 - 4 days after bloom. But in abnormal ovaries , except that POD activities were rising , soluble sugars and soluble proteins decreased markedly during 0 - 4 days after bloom.
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• The Photosynthetic Characters of Alocasia odora C. Koch. and Camelliajaponica L. in Greenhouse in Summer
• Zhao Shiwei;Liu Donghuan;Liu Yujun;Zhang Zuoshuang;and Gao Rongfu
• Acta Horticulturae Sinica. 2002, 29(5): 457-461.
• Abstract ( 1370 ) HTML ( 1718 ) PDF (124KB) ( 1718 ) 　　　
• The effect of higher temperature on net photosynthetic rates (Pn) of Alocasia odora C. Koch. and Camellia japonica L. leaves was investigated , which showed that Pn decreased under higher temperature and Pn in
  Alocasia odora C. Koch. decreased slightly. It was found that Pn decrease wasn’t inhibited under ruling out stomata restriction. It was also found that carboxylation efficiency and maximum RuBP regeneration rate declined
  above optimal temperature , and the maximum RuBP regeneration rate declined seriously. Photorespiration at higher temperature increased. Therefore , we suggest : 1) Alocasia odora C. Koch. has better adaptation to higher temperature and Camellia japonica is sensitive to higher temperature ; 2) Pn decrease at higher temperature is
  mainly caused by no2stomata restriction and maximum RuBP regeneration rate decline may be the main restriction factor ; 3) photorespiration may also be one of the reasons resulting in Pn decrease.
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• Biodiversity of Cardiocrinum giganteum and Observation during Its Introduction
• Zhang Jinzheng;Long Yayi;and Sun Guofeng
• Acta Horticulturae Sinica. 2002, 29(5): 462-466.
• Abstract ( 1307 ) HTML ( 1457 ) PDF (203KB) ( 1457 ) 　　　
• The discovery of Cardiocrinum giganteum (wall . ) Makino and the studies on its morphological diversity and karyotype variation are briefly reviewed. Through observation and analysis of the cultivation of bulbs from
  different origins , the classification and nomenclature of the speies , as well as the relationship between its cultivation and morphological variation of the plants are discussed , to provide reference for its utilization and commercialization.
  
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• Effects of Ethylene and Its Inhibitors on Flower Opening and Senescence of Cut Roses
• Cai Lei;Zhang Xiaohong;Shen Hongxiang;and Gao Junping
• Acta Horticulturae Sinica. 2002, 29(5): 467-472.
• Abstract ( 1942 ) HTML ( 1651 ) PDF (229KB) ( 1651 ) 　　　
• To investigate the effects of ethylene and its inhibitors on flower opening and senescence of cut roses ,. the cut rose flowers of 14 cultivars were treated with ethylene , AOA (aminooxyacetic acid) , an ACC synthase inhibitor , STS (silvet thiosulfate) , an ethylene action inhibitor , and PPOH (cisptopenylphosphnic acid) , an ethylene autocatalysis inhibitor. The results showed that the effects of ethylene on flower opening and senescence of different cut roses were quite different depending on the cultivars : acceleration , inhibition and insensitivity. On the basis of results above , ‘Samantha’and ‘Kardinal’, analogical climacteric cultivars , ‘Prima Donna’, analogical non2climacteric cultivars , and ‘Golden Times’, analogical cultivars which increase during later stage , were used to test the effects of ethylene and its inhibitors on ethylene production. The results
  showed that in‘Samantha’, analogical climacteric types , ethylene production was increased by ethylene , acting as ethylene-autocatalysis , while ethylene production was inhibited by ethylene in‘Kardinal’, acting as ethylene-autoinhibition. For the ‘Prima Donna’, no effect was obtained , just like the characters of non2climacteric cut flowers. As to ‘Golden Times’, the reaction is negative feedback. These results above suggest that the responses of cut roses to ethylene are very complicated , and it would be very difficult to classify the climacteric type of cut roses only according to the change of ethylene production during flower opening and senescence.
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• Selective Breeding of a New Breed of Magnolia denudata from Radiation􀀁induced Mutation of Callus
• Jiang Changyang;Ning Shuxiang;Yang Wenxin;and Xiao Rongjun
• Acta Horticulturae Sinica. 2002, 29(5): 473-476.
• Abstract ( 1580 ) HTML ( 960 ) PDF (149KB) ( 960 ) 　　　
• 2. 475×10^-10 C/ kg ray was used to radiate the callus of Magnolia denudata induced from the growing􀀁point in the medium MS+ Sodium naphenate 0. 1 mg/ L+ 6-BA 1. 5 mg/ L+ 2, 4􀀁D 1 mg/ L+ sugar 45 g/L. In the medium MS + ZT 2 mg/ L+ 2, 4-D 1 mg/ L, adventit ious seedlings with variation properties can be differentiated from some treated t issues. Those good seedlings were transplanted into soil and among them a chimaera with one part growing well and the other part basically same as the original parent was selected. A sexual reproduction was carried out on the mutation part with good variat ion characters. As a result, new breed bearing qualities such as growing fast and luxuriantly having strong resistance, blooming twice a year etc. was obtained.
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研究报告

• Studies on Growth and Development Rhythm of Sweet Cherry in Solar Greenhouse
• LüDeguo;Liu Guocheng;and Du Guodong
• Acta Horticulturae Sinica. 2002, 29(5): 477-479.
• Abstract ( 1237 ) HTML ( 901 ) PDF (154KB) ( 901 ) 　　　
• It was about 30 days for sweet cherry to bloom after heating by opening the mulching straw matress with which the blooming period lasting 10 days to 2 weeks. The physiological drop occured 17 days to 21 days after blooming , and the periods between physiological drop to fruit colouring were different during different years which lasted 29 days to 43 days. And there were little differences in the periods between fruit colouring to ripening which
  were all about 10 days . Dynamic growth patterns of flushes of sweet cherries in green house were typical“double S”, and the second fast growth period was compensatory growth which was more vigorous than the first one with almost all the axillary buds germinating in longer internode . The number of new roots decreased rapidly with opening the mulching film because of leaf premature senescence , and increased with shoot compensatory growth in a slight degree.
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• Plant Regeneration from Excised Immaturate Embryos of Peach (Prunuspersica L. )
• Yan Guohua and Zhou Yu
• Acta Horticulturae Sinica. 2002, 29(5): 480-482.
• Abstract ( 1440 ) HTML ( 1036 ) PDF (89KB) ( 1036 ) 　　　
• A three-stage culture program of somatic embryogenesis , consist of induction of embryogenic callus , formation and development of somatic embryos , regeneration of intact plantlets , was developed in in four peach (Prunus persica) cultivars , ‘Jingyan’, ‘Lühua 9’, ‘Wanmi’and ‘Dajiubao’. The percentage of germination and plant regeneration from normally developed soamtic embryos in the cultivars was 73. 5 % , 38. 6 % , 5. 4 % and 58. 2 % , respectively. TDZ is effective in stimulating adventitious bud regeneration from immature cotyledons of ‘Jingyan’, 70 % differentiation rate and 13. 8 adventitious buds per cotyledon were obtained. The regenerated adventitious shoots rooted at a rate of 90 %.
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• Studies on Reciprocal Differences in Interspecific Hybridization in Cucumis
• Chen Jinfeng;Zhuang Feiyun;Lou Qunfeng;Xu Yubo;Qian Chuntao;Ren Gang;and Luo Xiangdong
• Acta Horticulturae Sinica. 2002, 29(5): 483-485.
• Abstract ( 1354 ) HTML ( 1089 ) PDF (103KB) ( 1089 ) 　　　
• A set of reciprocal crosses with different chromosome level made between Cucumis sativus and C.hystrix as the experiment system was used to investigate the difference of morphology , fertility and DNA. The
  diameter of stem , the length of petiole , the shape and size of leaves were intermediated when compared to parents. The branching number and the appearance of first female flower showed paternal transmission while the length of inter-node of main stem showed maternal transmission in all of hybrids. The RAPD results indicated fifteen arbitrary primer band patterns were different among the four types of hybrids , and only six were the same. Some fragments obviously showed the paternal expression in the reciprocal cross. The fertility of reciprocal plants were great different . When C. hystrix used as female , the tetraploid (2n = 38) / diploid (2n = 19) plants had the higher fruit sets , and even the amphidiploidy plants could produce viable seeds. However , when the cucumber used as female , both tetraploid/ diploid plants were highly sterile and had very low fruit sets.
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• In Vitro Plant Regeneration from Callus Induced from Hypocotyl of Lettuce(Lactuca sativa)
• Gao Hui;Gou Xiaosong;Deng Yuntao;and Li Xufeng
• Acta Horticulturae Sinica. 2002, 29(5): 486-487.
• Abstract ( 1901 ) HTML ( 959 ) PDF (197KB) ( 959 ) 　　　
• Taking MS、1/ 2MS as basic media, adopting 6-BA、NAA、and 2, 4-D of different concentration composition to conduct t issue culture and plant regeneration from hypocotyl of lettuce, the result showed that medium of MS+ 6-BA 0. 5 mg/L+ 2, 4-D 1mg/L+ NAA 0. 1mg/ L , was the best to induce callus from hypocotyl, the rate of callus is 94%; and the differentiat ion medium, MS+ 6-BA 1. 0mg/ L + NAA 0. 05mg/ L, was the best to induce buds from callus and had a 100% plant regenerat ion rate; and it was for rooting media, 1/ 2MS+ NAA 0. 5 mg/ L, to induce root ing from seedlings.
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• RAPD Analysis of 18 Chrysanthemum Cultivars
• Qin Helan;You Jie;and Gao Junping
• Acta Horticulturae Sinica. 2002, 29(5): 488-490.
• Abstract ( 1417 ) HTML ( 1602 ) PDF (158KB) ( 1602 ) 　　　
• 18 cultivars of Chrysanthemum were analyzed using random amplified polymorphic DNAs (RAPDs) . Three primers out of 80 randomprimers showed high polymorphism , the polymorphic amplification fragment length ranged from 600 bp to 1300 bp. The 1200 bp fragment generated by primer OPD15 was present only in‘Dahongtuogui’, while the 1100 bp fragment generated by primer OPA17 was only absent in‘yulingguan’in 18 cultivars. The cultivars with similar petal type have high similarity coeficience (SC) among 18 cultivars.
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• The Preliminary Research on the Rapid Propagation of Phalaenopsis by Usingthe Joint-points of Flower-stems as Explants
• Lu Xuehua;Guo Wenjie;Xu Lihui;and Lin Xinhua
• Acta Horticulturae Sinica. 2002, 29(5): 491-492.
• Abstract ( 1627 ) HTML ( 2385 ) PDF (80KB) ( 2385 ) 　　　
• The stem-tip , root-tip , flower-stem-knot and cutting segment of lower-stem-knot of the plant were used as explants to study the rapid propagation method of Phalaenopsis schilleriana by tissue culture. The result indicated that the explants from different parts of the plants were different in protocorm like body induction rate. Among all the explants , the cutting section of flower-stem-knot was fastest in inducing the portocorm like body. The formation rate of protocorm like body could be accelerated by using the improved MS medium supplemented with 6-BA 5 - 7. 5 mg/ L , NAA 0. 5 - 1. 0 mg/ L + 15 %CW. It is beneficial to improving the survival rate to take the
  Sphagnum moss as the growing base of the tube seedlings in transplanting.
  
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• In Vitro Micropropagation of Gerbera Leaf
• Xu Shiqing;Yang Shihu;Ni Dan;and Wan Jianmin
• Acta Horticulturae Sinica. 2002, 29(5): 493-494.
• Abstract ( 1867 ) HTML ( 1579 ) PDF (178KB) ( 1579 ) 　　　
• Regenerable calli and plantlets were obtained from leaf and petiole segments of Gerbera in vitro plantlets and those regenerated plantlets were morphologically normal . The rate of callus formation and rate of shoot
  formation on optimum medium were as high as 96 % and 90 % separately. Four weeks’in vitro multiple times for those plantlets was 10. 85 while root formation rate was 99 % during root inducing. The earliest plantlets could be
  obtained in 4 weeks. Optimal media for micropropagation after optimization experiments were MS + 62BA 3. 0 mg·L^-1 + NAA 0. 1 mg·L^-1 for induction ; MS + 62BA 3. 0 mg·L + NAA 0. 2 mg·L^-1 for multiplication of plantlets ;1/ 2 MS + IAA 1. 0 mg·L^-1 for root formation. In vitro plantlets used for explants was at the stage with 3 - 4 leaves and suitable size of cut leaf segments was about 4 mm ×4 mm.
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新品种

• ‘Huali 2’—A New Early Ripening Pear Cultivar
• Wu Tongle and Luo Zhengrong
• Acta Horticulturae Sinica. 2002, 29(5): 495-495.
• Abstract ( 1372 ) HTML ( 841 ) PDF (154KB) ( 841 ) 　　　
• ‘Huali 2’ was bred by Huazhong Agricultural University from the cross between‘Ninomiyahakuri’and‘Kikusui’, made in 1978 and released in 2002. It matures in the early July in Wuhan, the fruit are medium in size, weighting 180 g on the average, round in shape with a clearly smooth greenish skin, the flesh is very fine and tender, crisp, juicy, sweet , nearly no grit cell. It bears early and has good productivity.
  
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• A New Chestnut Variety with High Quality and Early-maturity‘Shadi Chestnut’
• Zheng Xiaojiang;Chen Kefeng;Li Qiuwen;and Qin Shuanghe
• Acta Horticulturae Sinica. 2002, 29(5): 496-496.
• Abstract ( 1621 ) HTML ( 913 ) PDF (184KB) ( 913 ) 　　　
• The flesh of the fruit of ‘Shadi chestnut’, a new variety selected from the local chestnut resources of Enshi autonomous prefecture , is tender and the smell is fragrant . It also has many other advantages such as rich
  nutrition , high quality and so on. The ‘Shadi chestnut’is early-maturing and has high yield and resistance to storage , with exuberant vitality , good adaptability , high resistance to diseases and pests.
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• A New Cultivar of Black Currant (Ribes nigrum L. ) —‘Brodtorp’
• Sui Wei;Li Guangyu;Huo Junwei;Ding Xiaodong;and Yu Zeyuan
• Acta Horticulturae Sinica. 2002, 29(5): 497-497.
• Abstract ( 1181 ) HTML ( 1194 ) PDF (69KB) ( 1194 ) 　　　
• ‘Brodtorp’was selected from some black currant varieties bred by Poland. It fruit is large and even , average mass about 2. 6 g , the largest mass about 3. 8 g. It is non2frosty mildew and matures at the same time. The experiments for many years showed that it is suitable for both fresh eating and processing.
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• A New Few-seed Hybrid Watermelon‘Shaan Nong 9’
• Zhang Xian;Zhang Jinsheng;and Yang Jianqiang
• Acta Horticulturae Sinica. 2002, 29(5): 498-498.
• Abstract ( 1549 ) HTML ( 715 ) PDF (61KB) ( 715 ) 　　　
• ‘Shaan Nong 9’ is a middle-ripening watermelon hybrid. Its growing season is about 100 days, Its fruit shape is oblong, with pink flesh and few seeds. The average single fruit mass is above 8 kg. The soluble
  solid matter content in central part is above 12% . It is a hybrid with highly Fusarium wilt and anthrancnose disease resistance and good tolerance to virus diseases and drought condition, It is suitable to grow in main watermelon production region especially in northern side region of Changjiang River.
  
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• A New Hybrid Watermelon‘Xinda’
• Wang Hengwei;Zhao Baoquan;Tian Bin;and Qiao Dehua
• Acta Horticulturae Sinica. 2002, 29(5): 499-499.
• Abstract ( 1300 ) HTML ( 860 ) PDF (165KB) ( 860 ) 　　　
• Xinda is an early maturity watermelon hybrid. It can be harvested in 29 days after pollinating, and has a very good fruit􀀁setting property, medium resistance to Fusarium wilt . The fruit is eliptic in shape with red flesh, its central part sugar content is 12. 8% brix, it is good for transportation. The average single fruit mass is 6. 1 kg. The variety is suitable for early culture in protected or open fields in main watermelon growing region in China.
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• A New Early Ripening Hybrid Watermelon with Quality and Good Charactersfor Storage and Transportation‘Aiye 1’
• Wang Ming;Zhang Zhongguo;and Wang Weiying
• Acta Horticulturae Sinica. 2002, 29(5): 500-500.
• Abstract ( 1475 ) HTML ( 769 ) PDF (65KB) ( 769 ) 　　　
• ‘Aiye 1’( L J No. 1) is a very promising new early ripening watermelon hybrid cultivar developed by crossing B2 with T13. In addion, B2 has been treated by EMS for inducing ideal mutation. Fruits nearly round shaped with excellent appearance. The rind is green with dark stripes, hard with very well toughness and resiliency for good storage and shipping. It is of high yield, high resistance to disease. Flesh is deep red with refined texture, juicy, high sugar content, fine sweet flavor with high quality. The fruit setling is good. ‘Aiye 1’adaptates widely to different climate conditions.
  
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• A New Extremely Early Ripe Variety of Dolichos lablab L.‘Xiangbiandou 2’
• Peng Youlin;Huang Jianshao;Li Mi;and Wang Yun
• Acta Horticulturae Sinica. 2002, 29(5): 501-501.
• Abstract ( 1558 ) HTML ( 900 ) PDF (170KB) ( 900 ) 　　　
• The growth period for the new extremely early ripe variety of Dolichos lablab (Xiangbiandou 2) is about 240 d. Its fresh pod is 90 days earlier than the normal variety on the market with light green color, beaut iful appearance, crisp flesh, good market characters and excellent quality. Its individual can grow up vigorously with white flower, brown red seed and condensed planting character, it has the good disease resistance, heat and cold
  tolerance with the yield of about 39 750 kg/ hm².
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• New Rhododendron Varieties —‘Jinzhizhu’and‘Ziyan’
• Zhang Changqin and Luo Jifeng
• Acta Horticulturae Sinica. 2002, 29(5): 502-502.
• Abstract ( 1381 ) HTML ( 1139 ) PDF (156KB) ( 1139 ) 　　　
• ‘Jinzhizhu ’ is a cultivated variety of Rhododendron molle . It is a deciduous shrub with paper oblong-oblanceolate , yellow-green leaves and a umbel of 7 - 13 gold-yellow flowers without any spots inside. Ziyan’is also a cultivated variety of R. isimsii . It is an ever green shrub with paper evergreen leaves and a laxracemose umbel of about 3 - 5 purple flowers and flower-like calyx.
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