Different growth sensitivity to enhanced UV-B radiation between male and female Populus cathayana

	Different growth sensitivity to enhanced UV-B radiation between male and female Populus cathayana
	Xu, Xiao ; Zhao, Hongxia ; Zhang, Xiaolu ; Hanninen, Heikki ; Korpelainen, Helena ; Li, Chunyang
刊名	TREE PHYSIOLOGY
	2010
卷号	30 期号:12 页码:1489-1498
关键词	antioxidant enzymes biomass accumulation chlorophyll fluorescence chlorophyll pigments gas exchange UV-B-absorbing compounds water use efficiency
ISSN号	0829-318X
通讯作者	Li, CY, Chinese Acad Sci, Chengdu Inst Biol, POB 416, Chengdu 610041, Peoples R China
中文摘要	We investigated sex-related morphological and physiological responses to enhanced UV-B radiation in the dioecious species Populus cathayana Rehd. Cuttings were subjected to two UV-B radiation regimes: ambient (4.5 kJ m(-2) day(-1)) and enhanced (12.5 kJ m(-2) day(-1)) biologically effective UV-B radiation for one growing season. Enhanced UV-B radiation was found to significantly decrease the shoot height and basal diameter and to reduce the leaf area, dry matter accumulation, net photosynthesis rate (P-n), chlorophyll a/b ratio (Chl a/b) and anthocyanin content. Enhanced UV-B radiation also increased chlorophyll pigment, leaf nitrogen, malondialdehyde and abscisic acid (ABA) content, superoxide dismutase and peroxidase activities and UV-B-absorbing compounds. No significant effects of enhanced UV-B radiation were found on biomass allocation, gas exchange (except for P-n), photochemical efficiency of photosystem II or water use efficiency. Moreover, different sensitivity to enhanced UV-B radiation between males and females was detected. Under enhanced UV-B radiation, males exhibited significantly higher basal diameter and leaf nitrogen, and lower Chl a/b, ABA content, UV-B-absorbing compounds, as well as less decrement of leaf area and dry matter accumulation than did females. However, no significant sexual differences in these traits were found under ambient UV-B radiation. Our results suggest that males may possess a greater UV-B resistance than do females, with males having a more efficient antioxidant system and higher anthocyanin content to alleviate UV-B penetration stress than females.
学科主题	Forestry
收录类别	SCI
资助信息	National Natural Science Foundation of China [30771721, 30930075]; Chinese Academy of Sciences [KSCX2-YW-Z-1019]
语种	英语
公开日期	2011-07-08
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/22486]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Xu, Xiao,Zhao, Hongxia,Zhang, Xiaolu,et al. Different growth sensitivity to enhanced UV-B radiation between male and female Populus cathayana[J]. TREE PHYSIOLOGY,2010,30(12):1489-1498.
APA	Xu, Xiao,Zhao, Hongxia,Zhang, Xiaolu,Hanninen, Heikki,Korpelainen, Helena,&Li, Chunyang.(2010).Different growth sensitivity to enhanced UV-B radiation between male and female Populus cathayana.TREE PHYSIOLOGY,30(12),1489-1498.
MLA	Xu, Xiao,et al."Different growth sensitivity to enhanced UV-B radiation between male and female Populus cathayana".TREE PHYSIOLOGY 30.12(2010):1489-1498.