24-epibrassinolide and abscisic acid protect cucumber seedlings from chilling injury

被引：39
|
作者：
Yu, JQ [1 ]
Zhou, YH [1 ]
Ye, SF [1 ]
Huang, LF [1 ]
机构：
[1] Zhejiang Univ, Dept Hort, Hangzhou 310029, Peoples R China
来源：
JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY | 2002年 / 77卷 / 04期
关键词：
D O I：
10.1080/14620316.2002.11511524
中图分类号：
S6 [园艺];
学科分类号：
0902 ;
摘要：
A study investigated the ameliorative effects of the chill-induced inhibition of photosynthesis in cucumber by brassinolides and abscisic acid. Cucumber (Cucumis sativus L) seedlings at the three-leaf stage were sprayed with 24-epibrassinolide (EBS) and abscisic acid (ABA) at different concentrations. After chilling at 8degreesC, 4degreesC and 2degreesC for 3 d, the seedlings were allowed to recover under normal conditions. ABA and EBS pretreatments significantly alleviated chilling injury, increased the maximal photochemical efficiency (Fv/Fm) and net photosynthetic rate (Pn) of the chilled seedlings. Pn and apparent quantum yield of photosynthesis (QY) for seedlings chilled at 4degreesC declined to 40% and 39% of those for unchilled seedlings respectively, Pn and QY values for those pretreated with ABA and EBS, however, remained almost unchanged compared with those of unchilled seedlings.
引用
收藏
页码：470 / 473
页数：4
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