干旱区生态环境知识资源中心(Arid): 干旱胁迫下藜的光合特性研究

Arid

	干旱胁迫下藜的光合特性研究
其他题名	Photosynthetic Characteristics of Chenopodium album L.Grew under Drought-stress Condition
	孙存华; 李扬; 杜伟; 金会丽; 王东升; 陈湘玲; 徐新娜
ISSN	1673-5102
出版年	2007
卷号	27 期号:6 页码:715-720
中文摘要	通过人工控制水分模拟干旱来研究生长期的藜对干旱胁迫的生理生化反应,以期望为干旱农业的高效生产提供理论依据.以盆栽的藜为材料,用称重控制浇水的方法,研究了干旱胁迫对藜叶片的光合特性.结果表明:干旱胁迫下藜的光合日变化呈双峰型,有"午休"现象(13:00)且受气孔限制;最大净光合速率出现在上午8:00.与正常条件下生长的藜相比,干旱胁迫下藜的光饱和点(LSP)、最大净光合速率(Pn)、表现量子效率(AQy)、二氧化碳饱和点(CSP)和羧化效率(CE)均降低,分别为1 200 mumolphoton·m~(-2)·s~(-1)、8.01 mumol CO_2·m~(-2)·s~(-1)、0.0161 mumol CO_2·mol~(-1)photons、1 200 mumol CO_2·mol~(-1)、0.017 6 mumol CO_2·m~(-2)·s~(-1);光补偿点(LCP)、二氧化碳补偿点(CCP)升高,分别达到44.88 mumol photon·m~(-2)·s~(-1)、和46 mumol CO_2·mol~(-1),干旱使藜的光合能力下降.干旱胁迫下藜的光合能力虽有所下降,但与其它C_3植物相比仍具有较强的CO_2同化能力.藜是一种耐旱力较强的植物.
英文摘要	Drought is one of the stress conditions that often severely effects plant growth.The loss of agricultural production due to drought stress is estimated to nearly equal the total losses caused by all other environmental stresses.In this study,the photosythetic parameter of Chenopodium album L.under artificially simulated drought stresses were examined to provide a theoretical basis for effectively increasing agricultural production in arid areas.C.album L.was grown from freshly harvested seeds under natural light.Six pots of plants showing similar growth was treated with drought stress by controlled irrigation: 15% water content of soil was kept by weighing,watered once two days for the entire experimental process;the pots were protected from exposure to rain.The photosythetic parameter of Chenopodium album L.was determined with LI-6400 Portable Photosynthesis System in the first ten-day of July.The result shows that the diurnal variation curve of photosynthesis in the leaves of C.album L.assumes was a two-peak pattern,had the middle-day depression and belongs to the stomatal limitation type under the drought stress condition.Its net photosynthetic rate(Pn) reached the peak value at about 8:00.Compared with the plant growing under normal condition,the photosynthetic light saturation point(LSP),the net photosynthetic rate(Pn),apparent quantum yield(AQY),carbondioxide saturation point(CSP) and carboxylation efficiency(CE) all reduced,was 1200mumol photon·m~(-2)·s~(-1),8.01mumol photon·m~(-2)·s~(-1),0.0161mumol CO2·mol~(-1) photons、1200mumol CO_2·mol~(-1) and 0.0176mumol·m~(-2)·s~(-1) respectively;However,light compensation point(LCP),carbondioxide compensation Point(CCP) all increased,was 44.88mumol photon·m~(-2)·s~(-1) and 46mumol CO_2·mol~(-1) respectively.Under the drought stress condition,although the photosynthetic capability of C.album L.decreases,but comparing C.album L.with other C_3-plant it still have a great capability of assimilation CO_2.Chenopodium album L.is a drought-resistance plant.
中文关键词	藜 ; 干旱胁迫 ; 光合特性 ; CO2同化能力 ; 耐旱力
英文关键词	Chenopodium album L. drought-stress photosynthetic characteristics capacity of assimilation CO2 drought resistance
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:2966127
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221734
作者单位	徐州师范大学生命科学学院, 徐州, 江苏 221116, 中国
推荐引用方式 GB/T 7714	孙存华,李扬,杜伟,等. 干旱胁迫下藜的光合特性研究[J],2007,27(6):715-720.
APA	孙存华.,李扬.,杜伟.,金会丽.,王东升.,...&徐新娜.(2007).干旱胁迫下藜的光合特性研究.,27(6),715-720.
MLA	孙存华,et al."干旱胁迫下藜的光合特性研究".27.6(2007):715-720.