Males exhibit competitive advantages over females of Populus deltoides under salinity stress

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Males exhibit competitive advantages over females of Populus deltoides under salinity stress
	Li, Yan 1,2; Duan, Baoli 3; Chen, Juan 1,3; Korpelainen, Helena 4; Niinemets, Ulo 5; Li, Chunyang 2
刊名	TREE PHYSIOLOGY
	2016-12-01
卷号	36 期号:12 页码:1573-1584
关键词	competition dioecy oxidation resistance photosynthesis salinity stress
ISSN号	0829-318X
通讯作者	Chunyang Li
英文摘要	Sexual competition among dioecious plants affects sex ratios and the spatial distribution of the sexes in different environments. At present, little is known about sexual dimorphisms induced by different competition patterns under salinity stress. We employed Populus deltoides as a model to investigate sex-related growth as well as physiological and biochemical responses to salinity stress under conditions of intrasexual and intersexual competition. Potted seedlings (two seedlings per pot; two females, two males, or one female and one male) were exposed to two salt levels (0 and 50 mM NaCl) and salinity-and competition-driven differences in growth, assimilation rate, water use, contents of leaf pigments and osmotica, hydrogen peroxide (H2O2), and antioxidant enzyme and nitrate reductase activity were examined. In the absence of salinity, no significant differences in competitive ability between males and females subjected to intrasexual competition were observed, although the growth of females was moderately greater under intersexual competition. The salinity treatment significantly increased the sex differences in competitive ability, especially under intersexual competition. Under salinity stress, males showed decreased height, but displayed greater capacity for osmotic adjustment, enhancement of long-term water-use efficiency and increase in antioxidant enzyme activities. The absolute values of these traits were greater in salt-stressed males than in females under intersexual competition. In addition, salt-stressed males accumulated less Cl- and had lower H2O2 contents than females. These data collectively demonstrate that the competitive advantage of females in non-stressed conditions is lost under salinity. Greater salinity resistance of males growing intermixed with females under salt stress can importantly affect the sex ratio of P. deltoides populations.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Forestry
研究领域[WOS]	Forestry
关键词[WOS]	CARBON-ISOTOPE DISCRIMINATION ; SEX-RELATED DIFFERENCES ; WATER-USE EFFICIENCY ; SALT STRESS ; SPATIAL SEGREGATION ; DIOECIOUS PLANTS ; RATIO VARIATION ; DROUGHT STRESS ; RUMEX-ACETOSA ; ACER-NEGUNDO
收录类别	SCI
语种	英语
WOS记录号	WOS:000393273800012
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/18455]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Mianyang Normal Univ, Ecol Secur & Protect Key Lab Sichuan Prov, Mianyang 621000, Sichuan, Peoples R China 2.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Nurturing Stn, Linan 311300, Zhejiang, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 4.Univ Helsinki, Viikki Plant Sci Ctr, Dept Agr Sci, POB 27, FI-00014 Helsinki, Finland 5.Estonian Univ Life Sci, Inst Agr & Environm Sci, Kreutzwaldi 1, EE-51014 Tartu, Estonia
推荐引用方式 GB/T 7714	Li, Yan,Duan, Baoli,Chen, Juan,et al. Males exhibit competitive advantages over females of Populus deltoides under salinity stress[J]. TREE PHYSIOLOGY,2016,36(12):1573-1584.
APA	Li, Yan,Duan, Baoli,Chen, Juan,Korpelainen, Helena,Niinemets, Ulo,&Li, Chunyang.(2016).Males exhibit competitive advantages over females of Populus deltoides under salinity stress.TREE PHYSIOLOGY,36(12),1573-1584.
MLA	Li, Yan,et al."Males exhibit competitive advantages over females of Populus deltoides under salinity stress".TREE PHYSIOLOGY 36.12(2016):1573-1584.