干旱区生态环境知识资源中心(Arid): 黑河中游边缘绿洲湿润和干旱条件下棉花叶片光合特性比较

Arid

	黑河中游边缘绿洲湿润和干旱条件下棉花叶片光合特性比较
其他题名	Photosynthetic Characteristics of Cotton Leaves under Different Soil Moisture Conditions in Marginal Oasis Regions of Middle Reach of Heihe River Basin
	解婷婷; 苏培玺; 张岭梅; 严巧娣
ISSN	1000-4025
出版年	2009
卷号	29 期号:1 页码:128-135
中文摘要	在甘肃河西走廊中部黑河中游临泽北部边缘绿洲区,测定了湿润和干旱条件下早熟陆地棉(Gossypium hirsutum L.)品种新陆早8号棉花叶片的气体交换参数及叶绿素荧光参数动态日变化。结果表明:(1)不同土壤水分条件下棉花叶片均出现"光合午休"现象,但均未出现光抑制;干旱条件下引起棉花"光合午休"以非气孔因素为主,湿润条件下非气孔因素和气孔因素先后共同起作用。(2)干旱条件下棉花叶片净光合速率(Pn)在8:00～11:00高于湿润条件下,且均值提高10.5%,而其在12:00～18:00低于湿润条件下,且均值降低16.5%;干旱条件下叶片Pn和蒸腾速率(Tr)日均值(8:00～18:00)分别比湿润条件下降低4.9%和26.1%,水分利用效率(WUE)却提高了23.4%且达到显著水平。(3)不同土壤水分条件下棉花叶片PSⅡ最大光化学效率(Fv/Fm)都于14:00达全天最低值,但最低值均大于0.80。研究发现,湿润土壤条件并不能消除棉花的"光合午休"现象;干旱土壤条件也未使棉花出现光抑制,却使一定时段的水分利用效率显著提高。
英文摘要	Diurnal course of gas exchanges and cholorophyll fluorescency were used to study the mechanism of photosynthetic regulation under different soil moisture conditions for cotton(Gossypium hirsutum L.) growth in the marginal oasis regions of northern part of Linze in middle reach of Heihe River Basin in the middle region of Hexi Corridor in northwestern China.The results showed that:(1)There was typical midday depression of photosynthesis but no photoinhibition phenomenon or cotton leaves both in moist condition and in arid condition.The reduction of midday photosynthetic rate was mostly caused by non-stomatal factors in arid condition,while in moist condition by both non-stomatal factors and stomatal factors.(2)From 8:00 to 11:00,Pn of cotton leaves in arid condition was higher than that in moist condition,with the average value raising 10.5%;but Pn lower than that in moist condition from 12:00 to 18:00,with the average value reducing 16.5%.The daily average Pn and Tr in arid condition was lower than that in moist condition,reducing 4.9%,26.1%;while WUE raise 23.4%.The statistical analysis showed significant difference in WUE values between different soil moisture conditions.(3)The lowest value in Fv/Fm appeared at 14:00 and it is larger than 0.8 in both moist condition and arid condition.This study suggested that midday depression of photosynthesis phenomenon of cotton is not avoided in high soil moisture.And cotton photoinhibition phenomenon does not occur in low soil moisture.The heavy drought is advantageous in enhancing cotton water use efficiency while photosynthesis rate reduced little.
中文关键词	光合特性 ; 光合午休 ; 光抑制 ; 水分利用效率 ; 棉花
英文关键词	photosynthetic characteristic midday depression of photosynthesis photoinhibition water use efficiency cotton
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:3491219
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/224344
作者单位	中国科学院寒区旱区环境与工程研究所临泽内陆河流域研究站极端环境生物实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	解婷婷,苏培玺,张岭梅,等. 黑河中游边缘绿洲湿润和干旱条件下棉花叶片光合特性比较[J]. 中国科学院西北生态环境资源研究院,2009,29(1):128-135.
APA	解婷婷,苏培玺,张岭梅,&严巧娣.(2009).黑河中游边缘绿洲湿润和干旱条件下棉花叶片光合特性比较.,29(1),128-135.
MLA	解婷婷,et al."黑河中游边缘绿洲湿润和干旱条件下棉花叶片光合特性比较".29.1(2009):128-135.