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田间增加UV-B辐射对玉米光合生理的影响

罗南书1;钟章成2   

  1. 1吉首大学生物资源与环境科学学院, 吉首 416000;2西南大学生命科学学院三峡库区生态环境教育部重点实验室,重庆 400715
  • 收稿日期:2005-06-05 修回日期:2005-10-28 出版日期:2006-04-10 发布日期:2006-04-10

Effects of enhanced ultraviolet-B radiation on photosynthesis of maize

LUO Nanshu1;ZHONG Zhangcheng2   

  1. 1College of Biology and Environmental Sciences,Jishou University,Jishou 416000, China;2Key Laboratory of Ecoenvironments of Three Gorges Reservoir Region,Ministry of Education,School of Life Sciences,Southwest University,Chongqing 400715, China

  • Received:2005-06-05 Revised:2005-10-28 Online:2006-04-10 Published:2006-04-10

摘要: 自然条件下,分别增加0(CK组)、0.01(R1组)和0.015 J·m-2·s-1(R2组)3种强度的UVB辐射处理玉米(Zea mays L.),对重庆地区C4植物玉米整个生长期内光合作用的影响进行研究。结果表明,增强UV-B辐射导致玉米幼苗叶片光合色素含量(包括叶绿素a、叶绿素b、总叶绿素和类胡萝卜素)、Hill反应活力、气孔导度、光合速率下降,且随UVB辐射强度的增加,玉米幼苗光合作用所受抑制增强,而玉米成株所受影响不大。

关键词: 杉木, 精油, 抑菌活性, 柏木脑

Abstract: Under natural conditions,we studied the photosynthesis of maize (Zea mays L.) in its whole life treated with different intensities,i.e.,0 (CK),0.01 (R1) and 0.015 J·m-2·s-1 (R2) of ultraviolet-B (UV-B) radiation.The results showed that enhanced UV-B radiation reduced the photosynthetic pigment (including chlorophyll a,chlorophyll b,total chlorophyll and carotenoid) contents,Hill reaction activity,stamotal conductance,and net photosynthetic rate of maize seedling’s leaf,but had no effects on the photosynthesis of fully grown plant.

Key words: Cunninghamia lanceolata, Essential oils, Antimicrobial activity, Cedrol