Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress

	Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress
	Zhang, Sheng ; Chen, Lianghua ; Duan, Baoli ; Korpelainen, Helena ; Li, Chunyang
刊名	FOREST ECOLOGY AND MANAGEMENT
	2012
卷号	275 页码:68-78
关键词	Antioxidant enzymes Osmotic adjustment Photosynthesis Sexual difference Water deficit
ISSN号	0378-1127
通讯作者	Li, CY (reprint author), Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China.
产权排序	1
英文摘要	The effects of three watering regimes (100%, 50% and 25% of field capacity, FC) on photosynthetic traits and leaves' self-protective systems were investigated in Populus cathayana Rehd. males and females. The results showed that drought (25% of FC) caused disorder in photosynthesis, increased the amounts of osmotically active substances (soluble sugars, proteins and proline), accumulation of reactive oxygen species (ROS), changes in antioxidant enzyme activities and damage in the integrity of cellular membranes and chloroplasts in both males and females. However, compared with drought-stressed females, drought-stressed males showed (1) higher values of net photosynthetic rate (P-n), maximum rate of electron transport driving RuBP regeneration (J(max)), maximum rate of RuBP carboxylation (V-cmax), carboxylation efficiency (CE) and non-photochemical quenching coefficient (qP); (2) higher contents of soluble proteins and proline; (3) higher activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), peroxidase (POD) and polyphenoloxidase (PPO); (4) less negative effects on cellular membranes and chloroplasts. These results indicate that P. cathayana males have a better self-protection of the photosynthetic system, greater accumulation of substances for osmotic adjustment and a more efficient enzymatic detoxification cycle for eliminating the negative effects caused by ROS under drought stress than do females. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	Forestry
收录类别	SCI
资助信息	National Basic Research Program of China [2012CB416901]; National Natural Science Foundation of China [31170572]
语种	英语
WOS记录号	WOS:000304898200008
公开日期	2013-07-03
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/23822]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Zhang, Sheng,Chen, Lianghua,Duan, Baoli,et al. Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress[J]. FOREST ECOLOGY AND MANAGEMENT,2012,275:68-78.
APA	Zhang, Sheng,Chen, Lianghua,Duan, Baoli,Korpelainen, Helena,&Li, Chunyang.(2012).Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress.FOREST ECOLOGY AND MANAGEMENT,275,68-78.
MLA	Zhang, Sheng,et al."Populus cathayana males exhibit more efficient protective mechanisms than females under drought stress".FOREST ECOLOGY AND MANAGEMENT 275(2012):68-78.