嫁接对低氧胁迫下黄瓜生长和生理代谢的影响

园艺学报 ›› 2006, Vol. 33 ›› Issue (6): 1225-1230.

嫁接对低氧胁迫下黄瓜生长和生理代谢的影响

樊怀福;郭世荣;张润花;栗娜娜;崔聪聪;杜长霞

(南京农业大学园艺学院, 江苏南京210095)

收稿日期:2006-03-16 修回日期:2006-06-14 出版日期:2006-12-25 发布日期:2006-12-25
通讯作者: 郭世荣

Effects of Grafting on Growth and Physiological Metabolism in CucumberSeedlings under Hypoxia Stress

Fan Huaifu;Guo Shirong;Zhang Runhua;Li Nana;Cui Congcong;Du Changxia

(College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China)

Received:2006-03-16 Revised:2006-06-14 Online:2006-12-25 Published:2006-12-25
Contact: Guo Shirong

摘要/Abstract

摘要： 采用营养液水培, 以丝瓜为砧木, 研究了嫁接对黄瓜植株生长、生理代谢和低氧耐性的影响。结果表明, 以丝瓜嫁接黄瓜可明显提高黄瓜植株的低氧耐性, 在低氧胁迫8 d后, 嫁接苗的株高、茎粗、鲜样质量、干样质量、叶绿素含量、根系活力、超氧化物歧化酶( SOD) 、过氧化物酶( POD) 、过氧化氢酶(CAT) 、抗坏血酸过氧化物酶(APX) 、净光合速率( Pn) 、胞间CO₂ 浓度(Ci) 、气孔导度(Gs) 、蒸腾速率( Tr) 均显著高于自根苗, 而根系和叶片中超氧阴离子(O₂^·
) 产生速率显著低于自根苗。表明嫁接可明显提高黄瓜植株的低氧耐性, 耐低氧性的提高与嫁接苗植株较高的抗氧化能力和光合速率密切相关。

关键词: 黄瓜, 嫁接, 低氧胁迫, 活性氧, 光合特性

Abstract: Effects of grafting on growth, physiologicalmetabolism and hypoxia tolerance were studied incucumber (Cucumis sativus L. ) grafted on smooth luffa (Luffa cylindrica Roem. ) and grown in nutrient solution. The results showed that grafting significantly increased hypoxia tolerance of grafted cucumber seedlings.Plant height, stem thickness, fresh mass, dry mass of grafted seedlings and the activity of SOD, POD, CAT and APX in both leaves and roots of grafted seedlingswere markedly higher than those grown on own-roots after 8 days of hydroponic hypoxia stress. Similarly, root activity, the content of chlorophyll, net photosynthetic rate, stomatal conductance, intercellular CO₂ concentration and transpiration rate were significantly higher than those grown on own2roots under hypoxia stress. However, the rate of O₂^·
production of grafted seedlings was lower than that grown on own-roots after 8 days of hydroponic hypoxia stress. The higher levels of antioxidation and higher photosynthetic rate may be involved in higher hypoxia tolerance of grafted seedlings.

Key words: Cucumber, Graft, Hypoxia stress, Reactive oxygen, Photosynthetic characteristics

中图分类号:

S642.2

樊怀福;郭世荣;张润花;栗娜娜;崔聪聪;杜长霞. 嫁接对低氧胁迫下黄瓜生长和生理代谢的影响[J]. 园艺学报, 2006, 33(6): 1225-1230.

Fan Huaifu;Guo Shirong;Zhang Runhua;Li Nana;Cui Congcong;Du Changxia. Effects of Grafting on Growth and Physiological Metabolism in CucumberSeedlings under Hypoxia Stress[J]. ACTA HORTICULTURAE SINICA, 2006, 33(6): 1225-1230.

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