标题：Differential response to copper stress in the reproductive resources and allocation of metallophyte Kummerowia stipulacea作者：Gan, Jin-hua; Xiong, Zhi-Ting; Li, Jin-Ping; Chen, Da-Qing
来源出版物：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 卷：89页：204-211出版年：MAR 1 2013
摘要：Abundant seed production is a key life history trait for plant to maintain the stability of the whole population in adverse environments such as heavy metal contaminated mine area. In the current studies, we hypothesize that mine (metallicolous) populations of metallophytes have formed specialized reproductive strategies to adapt themselves to the heavy metal contaminated habitats, and differ from normal (non-metallicolous) populations in reproductive allocation. To test this hypothesis, the differences in reproductive resources and reproductive allocation between the copper mine and non-copper mine populations of pseudo-metallophyte Kummerowia stipulacea were comparatively examined under controlled Cu exposure experiments. Compared to non-copper mine population, copper mine population shows an increased seed output and larger reproductive effort under Cu stress. The increase of reproductive allocation in metallicolous population depends on not only seed size but also seed number per plant. The plants of metallicolous population increase allocation to the reproductive organs at the expense of a curtailment of allocation to vegetative traits, resulting in plants with shorter height and fewer branch numbers. There is little evidence displaying effect of root nodule on the reproductive resources and allocation. In addition, plants in metallicolous population reduce the transfer of Cu from roots to aboveground parts. These data suggest that plants of metallicolous population tend to invest more resources to reproductive output and increase their reproductive allocation in the adaptive evolution to Cu-enriched mine soils.
作者关键词：Kummerowia stipulacea, Seed, Reproductive allocation, Metallophyte, Copper
扩展关键词：ELSHOLTZIA-HAICHOWENSIS S; LIFE-HISTORY TRAITS; SEED-SIZE; TRADE-OFF; ECOPHYSIOLOGICAL RESPONSES; NONTOLERANT POPULATIONS; ARABIDOPSIS-THALIANA; THLASPI-CAERULESCENS; MINERAL-NUTRITION; GROWTH
通讯作者地址：Xiong, Zhi-Ting;Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430079, Hubei, Peoples R China.
[Gan, Jin-hua; Xiong, Zhi-Ting] WuhanUniv, Sch Resource & Environm Sci,Wuhan430079,Hubei, Peoples RChina.
[Gan, Jin-hua; Chen, Da-Qing] Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst,Wuhan430223,Hubei, Peoples RChina.
[Li, Jin-Ping]WuhanText Univ, Sch Environm Engn,Wuhan430073,Hubei, Peoples RChina.
研究方向：Environmental Sciences & Ecology; Toxicology
版权所有 © 武汉大学资源与环境科学学院