Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/aob/mcr276 |
Evolution and ecology meet molecular genetics: adaptive phenotypic plasticity in two isolated Negev desert populations of Acacia raddiana at either end of a rainfall gradient | |
Ward, David1; Shrestha, Madan K.2,3; Golan-Goldhirsh, Avi4 | |
通讯作者 | Ward, David |
来源期刊 | ANNALS OF BOTANY
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ISSN | 0305-7364 |
EISSN | 1095-8290 |
出版年 | 2012 |
卷号 | 109期号:1页码:247-255 |
英文摘要 | Background and Aims The ecological, evolutionary and genetic bases of population differentiation in a variable environment are often related to the selection pressures that plants experience. We compared differences in several growth-and defence-related traits in two isolated populations of Acacia raddiana trees from sites at either end of an extreme environmental gradient in the Negev desert. Methods We used random amplified polymorphic DNA (RAPD) to determine the molecular differences between populations. We grew plants under two levels of water, three levels of nutrients and three levels of herbivory to test for phenotypic plasticity and adaptive phenotypic plasticity. Key Results The RAPD analyses showed that these populations are highly genetically differentiated. Phenotypic plasticity in various morphological traits in A. raddiana was related to patterns of population genetic differentiation between the two study sites. Although we did not test for maternal effects in these long-lived trees, significant genotype x environment (G x E) interactions in some of these traits indicated that such plasticity may be adaptive. Conclusions The main selection pressure in this desert environment, perhaps unsurprisingly, is water. Increased water availability resulted in greater growth in the southern population, which normally receives far less rain than the northern population. Even under the conditions that we defined as low water and/or nutrients, the performance of the seedlings from the southern population was significantly better, perhaps reflecting selection for these traits. Consistent with previous studies of this genus, there was no evidence of trade-offs between physical and chemical defences and plant growth parameters in this study. Rather, there appeared to be positive correlations between plant size and defence parameters. The great variation in several traits in both populations may result in a diverse potential for responding to selection pressures in different environments. |
英文关键词 | Phenotypic plasticity genotype x environment interactions reaction norms trade-off antiherbivore defence resource availability hypothesis local adaptation Negev desert Acacia raddiana rainfall gradient |
类型 | Article |
语种 | 英语 |
国家 | South Africa ; Israel |
收录类别 | SCI-E |
WOS记录号 | WOS:000298191900021 |
WOS关键词 | RESOURCE AVAILABILITY HYPOTHESIS ; LOCAL ADAPTATION ; PLANT DEFENSE ; PANCRATIUM-SICKENBERGERI ; GROWTH-RESPONSES ; LONG-TERM ; HERBIVORY ; DIFFERENTIATION ; TOLERANCE ; SAVANNA |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
来源机构 | Ben-Gurion University of the Negev |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/171207 |
作者单位 | 1.Univ KwaZulu Natal, Sch Biol & Conservat Sci, ZA-3209 Scottsville, South Africa; 2.Ben Gurion Univ Negev, Blaustein Inst Desert Res, Ramon Sci Ctr, IL-84990 Midreshet Ben Gurion, Israel; 3.Ben Gurion Univ Negev, Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, IL-84990 Midreshet Ben Gurion, Israel; 4.Ben Gurion Univ Negev, Blaustein Inst Desert Res, Albert Katz Dept Dryland Biotechnol, French Associates Inst Agr & Biotechnol Drylands, IL-84990 Midreshet Ben Gurion, Israel |
推荐引用方式 GB/T 7714 | Ward, David,Shrestha, Madan K.,Golan-Goldhirsh, Avi. Evolution and ecology meet molecular genetics: adaptive phenotypic plasticity in two isolated Negev desert populations of Acacia raddiana at either end of a rainfall gradient[J]. Ben-Gurion University of the Negev,2012,109(1):247-255. |
APA | Ward, David,Shrestha, Madan K.,&Golan-Goldhirsh, Avi.(2012).Evolution and ecology meet molecular genetics: adaptive phenotypic plasticity in two isolated Negev desert populations of Acacia raddiana at either end of a rainfall gradient.ANNALS OF BOTANY,109(1),247-255. |
MLA | Ward, David,et al."Evolution and ecology meet molecular genetics: adaptive phenotypic plasticity in two isolated Negev desert populations of Acacia raddiana at either end of a rainfall gradient".ANNALS OF BOTANY 109.1(2012):247-255. |
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