Sexual differences in defensive and protective mechanisms of Populus cathayana exposed to high UV-B radiation and low soil nutrient status

	Sexual differences in defensive and protective mechanisms of Populus cathayana exposed to high UV-B radiation and low soil nutrient status
	Feng, Lihua ; Jiang, Hao ; Zhang, Yuanbin ; Zhang, Sheng
刊名	PHYSIOLOGIA PLANTARUM
	2014
卷号	151 期号:4 页码:434-445
通讯作者	Zhang, S (reprint author), Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China.
产权排序	1
合作状况	其它
英文摘要	Previous studies have indicated that Populus cathayana Rehder females are more sensitive and less tolerant to stressful environments than males, but it is still unknown whether there are sexual differences in defensive and protective traits under high UV-B (HUVB) radiation and low soil nutrient status. In this study, P. cathayana was employed as a model species to investigate sex-related physiological and biochemical responses to UV-B radiation under different soil nutrient conditions. Cuttings were exposed to two UV-B radiation regimes (ambient UV-B radiation and decreased UV-B radiation) under two soil nutrient status (topsoil and deep soil) for 100 days over one growing season. Both HUVB radiation and low soil nutrient status induced greater decreases in plant growth, dry mass accumulation, gas exchange and leaf nitrogen use efficiency in females than in males, and greater increases in lipid peroxide and antioxidant enzyme activities, and secondary defense capacities in males than in females. Moreover, sexually different responses happened also in organelle ultrastructure. Our results showed that: (1) females suffered greater negative effects and exhibited lower defense capacities than did males under HUVB radiation, low soil nutrient status and their combination; (2) low soil nutrient status reduced plant's sensitivity to HUVB radiation by increasing allocation to defense and decreasing allocation to growth compared with high soil nutrient status. These results provide evidence that sexually different tradeoffs happen between growth and defense in P. cathayana under HUVB radiation and low soil nutrient status.
学科主题	Plant Sciences
收录类别	SCI
语种	英语
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/26510]
专题	成都生物研究所_生态研究
推荐引用方式 GB/T 7714	Feng, Lihua,Jiang, Hao,Zhang, Yuanbin,et al. Sexual differences in defensive and protective mechanisms of Populus cathayana exposed to high UV-B radiation and low soil nutrient status[J]. PHYSIOLOGIA PLANTARUM,2014,151(4):434-445.
APA	Feng, Lihua,Jiang, Hao,Zhang, Yuanbin,&Zhang, Sheng.(2014).Sexual differences in defensive and protective mechanisms of Populus cathayana exposed to high UV-B radiation and low soil nutrient status.PHYSIOLOGIA PLANTARUM,151(4),434-445.
MLA	Feng, Lihua,et al."Sexual differences in defensive and protective mechanisms of Populus cathayana exposed to high UV-B radiation and low soil nutrient status".PHYSIOLOGIA PLANTARUM 151.4(2014):434-445.