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园艺学报 ›› 2006, Vol. 33 ›› Issue (4): 762-766.

• 研究论文 • 上一篇    下一篇

油菜素内酯对黄瓜苗期叶片光合机构调节作用的研究

胡文海1, 3;黄黎锋1;毛伟华1;周艳虹1;喻景权1, 2*   

  1. (1 浙江大学园艺系, 浙江杭州310029; 2 农业部园艺植物生长发育与生物技术重点开放实验室, 浙江杭州 310029;3 井冈山学院生命科学系, 江西吉安 343009)
  • 收稿日期:2005-09-26 修回日期:2005-11-21 出版日期:2006-08-25 发布日期:2006-08-25

Role of Brassinosteroids in the Regulation of Photosynthetic Apparatus in Cucumber Leaves

HuWenhai1, 3;Huang Lifeng1;Mao Weihua1;Zhou Yanhong1;Yu Jingquan1, 2*
  

  1. (1Horticultural Department, Zhejiang University, Hangzhou, Zhejiang 310029, China; 2Laboratory of Horticultural Plant Growth, Development and Biotechnology, Ministry of Agriculture, Hangzhou, Zhejiang 310029, China; 3Department of Life Science, Jinggangshan College, Ji'an, Jiangxi 343009, China)
  • Received:2005-09-26 Revised:2005-11-21 Online:2006-08-25 Published:2006-08-25

摘要: 0.1 mg· L - 1油菜素内酯( EBR) 处理黄瓜叶片后能显著提高净光合速率( Pn) , 其效应可持
续一周。EBR 处理对叶片叶绿素含量和气孔限制值(l) 无明显影响, 但显著提高了表观量子效率
(AQY) 、羧化效率(CE) 、Rubisco最大羧化速率(Vc,max ) 和RuBP最大再生速率( Jmax ) 。EBR还通过增加PSⅡ反应中心开放程度( qP) 从而提高PSⅡ光合电子传递量子效率(ΦPSⅡ) , 但不影响天线色素的光能转化效率( Fv'/Fm') 。

关键词: 油菜素内酯, 黄瓜, 光合作用, 叶绿素荧光, 调节

Abstract: Spray with 0.1 mg·L - 1 24-epibrassinolide ( EBR) significantly up-regulated the net photosynthetic rates of cucumber (Cucumis sativus) seedlings and the effect lasted for 1 week. EBR had no effect on chlorophyll content and stomatal limitation value (l) , but significantly increased apparent quantum yield(AQY) , carboxylation efficiency (CE) , the maximum carboxylation rate of Rubisco (Vc,max ) and the maximum rate of RuBP regeneration (Jmax ). EBR treatment also increased the p roportion of‘open’PSⅡ reaction centers ( qP) , thereby resulting in an increased quantum yield of PSII electron transport (ΦPSⅡ ) , but had little effects on the maximal photochemical efficiency of PSⅡ ( Fv/Fm) , and efficiency of energy capture by open PSⅡ reaction centres ( Fv’ /Fm’).

Key words: Brassinosteroid, Cucumber, Chlorophyll fluorescence, Photosynthesis, Regulation