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植物研究 ›› 2013, Vol. 33 ›› Issue (2): 181-185.doi: 10.7525/j.issn.1673-5102.2013.02.010

• 论文 • 上一篇    下一篇

外源NO对增补UV-B辐射下兴安落叶松幼苗叶片光合色素和叶绿素荧光特性的影响

孟庆焕1,2;祖元刚1,2;郭晓瑞1,2;段喜华1,2*   

  1. 1.东北林业大学森林植物生态学教育部重点实验室,哈尔滨 150040;2.东北林业大学林业生物制剂教育部工程研究中心,哈尔滨 150040
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2013-03-20 发布日期:2013-03-20
  • 通讯作者: 段喜华
  • 基金资助:
     

Effect of Exogenous Nitric Oxide on Photosynthetic Pigments and Chlorophyll Fluorescence under Enhanced UV-B Radiation in Larix gmelinii

MENG Qing-Huan;ZU Yuan-Gang;GUO Xiao-Rui;DUAN Xi-Hua;*   

  1. 1.Key Laboratory of Forest Plant Ecology of Northeast Forestry University,Ministry of Education,Harbin 150040;2.Engineering Research Center of Forest Bio-preparation,Ministry of Education,Northeast Forestry University,Harbin 150040
  • Received:1900-01-01 Revised:1900-01-01 Online:2013-03-20 Published:2013-03-20
  • Contact: DUAN Xi-Hua
  • Supported by:
     

摘要: 在增强UV-B辐射下,以3年生兴安落叶松幼苗为实验材料,研究了外源NO供体硝普钠(Sodium nitroprusside,SNP)对幼苗的光合色素(Chla、Chlb和Car)和叶绿素荧光参数的影响。方差分析结果表明0.5 mmol·L-1的SNP对增补UVB胁迫下的兴安落叶松幼苗产生显著影响。0.5 mmol·L-1的SNP能够显著抑制增补UV-B辐射后光合色素、Fv/FmΦPSⅡFv′/Fm′和qP的明显下降以及Chla /Chlb、FoNPQ的升高。表明了外源NO能够减轻UV-B辐射胁迫下兴安落叶松幼苗光合反应中心的生理损伤,从而增强兴安落叶松幼苗对增补UV-B辐射胁迫环境的适应能力。

关键词: 光合色素, 叶绿素荧光参数, UV-B辐射, 兴安落叶松

Abstract: Under enhanced UV-B radiation, 3-year-old seedlings of Larix gmelinii were chose as target to study the impact of exogenous nitric oxide on photosynthetic pigments (Chl a, Chl b and Car) and chlorophyll fluorescence. The results of variance analysis showed 0.5 mmol·L-1 sodium nitroprusside (SNP), a NO donor, have significant impact on nursery stocks of L.gmelinii under enhanced UV-B radiation stress. 0.5 mmol·L-1 SNP can significantly inhibited the apparent decline in photosynthetic pigments, Fv/Fm, ΦPSⅡ,Fv′/Fm′ and qP, and the obvious increase in chl a/chl b, Fo and NPQ after supplement UV-B radiation. All these results indicated that exogenous nitric oxide could reduce the physical damage of photosynthetic reaction centers in seedlings of L.gmelinii under UV-B radiation stress, and enhancement of environmental adaptability of the seedling to supplementary UV-B radiation stress.

Key words: photosynthetic pigments, chlorophyll fluorescence, UV-B radiation, Larix gmelinii

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