互花米草与芦苇光合色素含量对淹水措施的响应  

Responses of photosynthetic pigments of Spartina alterniflora and Phragmites australis to durative waterlogging

作　　者：古志钦[1] 张利权[1,2] 袁琳[1] 

机构地区：[1]华东师范大学河口海岸国家重点实验室,上海200062 [2]城市生态化过程与生态恢复上海市重点实验室,上海200062

出　　处：《应用生态学报》2009年第10期2365-2369,共5页Chinese Journal of Applied Ecology

基　　金：高等学校学科创新引智计划项目(B08022);上海市科委重点科技项目(08231200702)资助

摘　　要：以上海崇明东滩入侵植物互花米草与本地种芦苇为研究对象,研究持续淹水胁迫对两种植物光合色素含量的影响.结果表明:互花米草与芦苇叶片的光合色素基本组成与含量不同,对持续淹水的响应也不同.在持续淹水胁迫下,互花米草叶绿素a、叶绿素b及类胡萝卜素含量降低,叶绿素a/b、类胡萝卜素/叶绿素值提高;芦苇各色素含量升高,叶绿素a/b、类胡萝卜素/叶绿素值基本保持稳定.解除持续淹水胁迫后,互花米草各色素含量逐渐升高,叶绿素a/b、类胡萝卜素/叶绿素值降低,并逐渐接近对照水平;而芦苇各色素含量显著高于对照.两种植物均表现出一定的补偿效应,但芦苇比互花米草更能适应同等程度的持续淹水胁迫.应用持续淹水措施治理互花米草时,可采用本地种芦苇作为治理后湿地恢复的替代植物.With the invasive plant Spartina aherniflora and indigenous plant Phragmites australis in Chongming Dongtan Nature Reserve of Shanghai as test objects, the responses of their photosynthetic pigments to durative waterlogging were studied during the growth season in 2008. The basic composition and the content of the pigments differed with plant species, and their responses to durative waterlogging also differed. Under durative waterlogging stress, S. alterniflora had the decreased contents of chlorophyll a, b and carotenoid but the increased chlorophyll a/b and carotenoid/chloro- phyll ratios, whereas P. australis had the increased pigment contents and rather constant chlorophyll a/b and carotenoid/chlorophyll ratios. After the waterlogging stress relieved, the pigment contents of S. alterniflora increased and its chlorophyll a/b and carotenoid/chlorophyll ratios decreased to the levels of the control, whereas the pigment contents of P. au,stralis were significantly higher than the control. Both S. alterniflora and P. australis showed a compensatory effect after the stress relieved. P. australis could better adapt to the waterlogging stress than S. alterniflora, being able to be used as a substitutive plant for the restoration of coastal wetlands.

关 键 词：互花米草 芦苇 光合色素 淹水胁迫 上海崇明东滩 

分 类 号：S451[农业科学—植物保护]