DOI: 10.1111/gcb.12858
论文题名: Plant stomatal closure improves aphid feeding under elevated CO<inf>2</inf>
作者: Sun Y. ; Guo H. ; Yuan L. ; Wei J. ; Zhang W. ; Ge F.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 7 起始页码: 2739
结束页码: 2748
语种: 英语
英文关键词: Medicago truncatula
; Acyrthosiphon pisum
; Elevated CO2
; Feeding behavior
; Stomata
; Water potential
Scopus关键词: aphid
; carbon dioxide
; feeding behavior
; fitness
; host plant
; legume
; stomata
; transpiration
; Acyrthosiphon pisum
; Aphididae
; Hexapoda
; Medicago truncatula
英文摘要: 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 . © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61662
Appears in Collections: 影响、适应和脆弱性
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作者单位: State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Sun Y.,Guo H.,Yuan L.,et al. Plant stomatal closure improves aphid feeding under elevated CO<inf>2</inf>[J]. Global Change Biology,2015-01-01,21(7)