亚硫酸氢钠处理减轻低温对温州蜜柑光合作用的影响

园艺学报 ›› 2003, Vol. 30 ›› Issue (02): 195-197.

亚硫酸氢钠处理减轻低温对温州蜜柑光合作用的影响

郭延平¹;苏吉虎²; 王宏炜²; 沈允钢²; 张良诚¹

(¹浙江大学园艺系，杭州310029； ²中国科学院上海植物生理生态研究所，上海200032)

收稿日期:2002-03-13 修回日期:2002-06-05 出版日期:2003-04-25 发布日期:2003-04-25

Attenuation of Cbilliog Efect on Photosynthesis of Satsuma Mandarin(Citrus unshiu Marc．)by NaHSO₃ Application

Guo Yanping¹;Su Jihu²; Wang Hongwei²; Shen Yungang²; Zhang Liangcheng¹

Abstract：Chilling stress led to decline in net photosynthetic rate(Pn)，photochemical eficiency (Fv/Fm) 0f PSII and photosynthetic electron transport rate(erR)in satsuma mandarin leaves．Intensity of chlorophyll millisecond delayed light emission(ms．DLE)ofthe leaves，which reflects the transmembrane proton motive force，and ATP level in the leaves were also lowered by chilling stress(2℃ 10 h in the dark)．Smearing the leaves with5 mmol/L NaHSO₃ before exposure to clliUiIlg was found to Ilg about less decrease in these panuneters of the chilled plants．Thus，Pn and Fv/Fm were decreased by 52.7% and 24% ，respectively。as a result of chilling in the smeared leaves as compared with the corresponding 64.2%and 35.6%decrease in the contro1．Lowering of ETR an d level following chilling stress was practically eliminated by NaHSOs trealment． Evidently, the harmful effects of chilling Oll photosynthetic apparatus an d photosynthesis were substantially alleviated by the application of NaHS0₃ in citrus，which may be potentially useful in fruit culture practice．

Received:2002-03-13 Revised:2002-06-05 Online:2003-04-25 Published:2003-04-25

摘要/Abstract

摘要： 低温胁迫使温州蜜柑叶片的净光合速率(Pn)、光系统Ⅱ的光化学效率(Fv/Fm)及光合电子
传递速率(ETR)下降，反映跨膜质子动力势的叶绿素毫秒延迟发光(ms-DIE)减弱，叶片中的ATP含量降低。低温胁迫前，用NaHSO₃ 5 mmol/L涂于叶片表面，可使处理植株叶片的Pn和Fv/Fm分别少下降了11.5%和11.6%，ETR和ATP含量几乎没有下降，ms-DLE的下降幅度减少。可见，在柑橘上施用NaHSO₃能够减轻短期低温对光合机构及光合作用的影响。

关键词: 柑橘, 温州蜜柑, 亚硫酸氢钠, 光合作用, 低温, 叶绿素

Abstract: (¹Depatment of Horticulture, Zhejiang University,Hangzhou 310029, China; ²Shanghai Institute of Plant Physiology and Ecology,Acdemic Sinica,Shanghai 200032,China )

Key words: Citrus unshiu Marc., NaHS0₃, Photosynthesis, Chilling, Chlorophyll millisecond delayed light emission

中图分类号:

S 666．1

郭延平;苏吉虎;王宏炜;沈允钢;张良诚. 亚硫酸氢钠处理减轻低温对温州蜜柑光合作用的影响[J]. 园艺学报, 2003, 30(02): 195-197.

Guo Yanping;Su Jihu;Wang Hongwei;Shen Yungang;Zhang Liangcheng. Attenuation of Cbilliog Efect on Photosynthesis of Satsuma Mandarin(Citrus unshiu Marc．)by NaHSO₃ Application[J]. ACTA HORTICULTURAE SINICA, 2003, 30(02): 195-197.

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