论文
论文题目: Plant stomatal closure improves aphid feeding under elevated CO2
论文题目英文:
作者: 孙玉诚①,郭慧娟①,Liang Yuan,魏佳宁,#Wen-Hao Zhang,戈峰*
论文出处:
年: 2015
卷: 21
期: 7
页: 2739-2748
联系作者: 戈峰
发表期刊: Global Change Biology
ISSN:
第一作者所在部门:
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论文连接 http://onlinelibrary.wiley.com/doi/10.1111/gcb.12858/abstract
影响因子:
摘要: Stomata help plants regulate CO2 absorption and water vapor release in response to various environmental changes, and plants decrease their stomatal apertures and enhance their water status under elevated CO2. Although the bottom-up effect of elevated CO2 on insect performance has been extensively studied, few reports have considered how insect fitness is altered by elevated CO2-induced changes in host plant water status. We tested the hypothesis that aphids induce stomatal closure and increase host water potential, which facilitates their passive feeding, and that this induction can be enhanced by elevated CO2. Our results showed that aphid infestation triggered the abscisic acid (ABA) signaling pathway to decrease the stomatal apertures of Medicago truncatula, which consequently decreased leaf transpiration and helped maintain leaf water potential. These effects increased xylem-feeding time and decreased hemolymph osmolarity, which thereby enhanced phloem-feeding time and increased aphid abundance. Furthermore, elevated CO2 up-regulated an ABA-independent enzyme, carbonic anhydrase, which led to further decrease in stomatal aperture for aphid-infested plants. Thus, the effects of elevated CO2 and aphid infestation on stomatal closure synergistically improved the water status of the host plant. The results indicate that aphid infestation enhances aphid feeding under ambient CO2 and that this enhancement is increased under elevated CO2.
英文摘要:
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