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园艺学报 ›› 2011, Vol. 38 ›› Issue (4): 613-620.

• 果树 •    下一篇

外源NO对干旱胁迫下平邑甜茶幼苗叶绿素荧光参数和光合速率的影响

曹 慧1,2,* ,王孝威1,邹岩梅2,束怀瑞2,*   

  1. 1潍坊学院生物工程学院,山东潍坊 261061;2国家苹果工程技术研究中心,山东泰安 271018
  • 收稿日期:2010-11-26 修回日期:2011-03-30 出版日期:2011-04-25 发布日期:2011-04-25
  • 通讯作者: 曹 慧,束怀瑞

Effects of Exogenous Nitric Oxide on Chlorophyll Fluorescence Parameters and Photosynthesis Rate in Malus hupehensis Seedlings Under Water Stress

CAO Hui 1,2,*,WANG Xiao-wei1,ZOU Yan-mei2,and SHU Huai-rui2,*   

  1. 1 Bioengineering Institute,Weifang University,Weifang,Shandong 261061,China;2 National Research Center for Apple Engineering and Technology,Tai’an,Shandong 271018,China)
  • Received:2010-11-26 Revised:2011-03-30 Online:2011-04-25 Published:2011-04-25
  • Contact: CAO Hui,and SHU Huai-rui

摘要: 以20%聚乙二醇(PEG6000)处理模拟干旱,利用一氧化氮(nitric oxide,NO)供体硝普钠(sodium nitroprusside,SNP)处理平邑甜茶[Malus hupehensis(Pamp.)Rehd.]幼苗,探讨外源NO对水分胁迫下平邑甜茶幼苗叶绿素荧光参数和光合速率的影响。结果表明:水分胁迫下平邑甜茶幼苗Fo显著上升,Fv/Fm、qP、ETR、Yield、叶绿素含量和光合速率显著降低,qN在胁迫的前3 d呈上升趋势,之后大幅度下降;通过外施不同浓度的SNP(100 ~ 700 μmol · L-1)均使水分胁迫下平邑甜茶幼苗 Fo上升及Fv/Fm、ETR、q P、Yield、叶绿素含量和光合速率下降幅度明显减小。不同处理缓解作用为:300 μmol · L-1 SNP > 500 μmol · L-1 SNP > 100 μmol · L-1 SNP > 700 μmol · L-1 SNP,其中300 ~ 500 μmol · L-1 SNP处理缓解效应明显,但以300 μmol · L-1 SNP处理效果最好。

关键词: 平邑甜茶, 干旱胁迫, 一氧化氮, 叶绿素荧光参数, 光合速率

Abstract: The effects of exogenous NO on chlorophyll fluorescence parameters and photosynthesis rate in Malus hupehensis(Pamp.)Rehd. seedlings were studied in simulating drought condition of nutrient solution cultivation containing 20% polyethylene glycol 6000(PEG6000)and sodium nitroprusside(SNP). The results showed that the Fo significantly increased,however,the Fv/Fm,qP,ETR,Yield,chlorophyll contents and photosynthesis rate all markedly decreased when the seedlings treated with PEG6000. Meanwhile,the qN increased within 3 days and then drastically decreased. On the other hand,the increase of Fo and the decrease of Fv/Fm,qP,ETR,Yield,chlorophyll contents and photosynthesis rate were all observed when the seedlings treated with 100700 μmol · L1 SNP. The results also indicated that exogenous nitric oxide with different treatments all had alleviated effects on Malus hupehensis(Pamp.)Rehd. seedlings and the alleviation function in the treatments was 300 μmol · L-1 SNP > 500 μmol · L-1 SNP > 100 μmol · L-1 SNP > 700 μmol · L-1 SNP. Moreover,there were remarkably alleviated effects with treatments from 300 μmol · L-1 SNP to 500 μmol · L-1 SNP,in which 300 μmol · L-1 SNP showed the best effect.   

Key words: Malus hupehensis(Pamp.)Rehd., water stress, nitric oxide, chlorophyll fluorescence parameters, photosynthesis rate

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