DOI: 10.1111/gcb.12260
论文题名: Pea aphid promotes amino acid metabolism both in Medicago truncatula and bacteriocytes to favor aphid population growth under elevated CO2
作者: Guo H. ; Sun Y. ; Li Y. ; Tong B. ; Harris M. ; Zhu-Salzman K. ; Ge F.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 10 起始页码: 3210
结束页码: 3223
语种: 英语
英文关键词: Acyrthosiphon pisum
; Amino acid
; Bacteriocyte
; Biological nitrogen fixation
; Elevated CO2
; Medicago truncatula
Scopus关键词: abundance
; amino acid
; aphid
; carbon dioxide enrichment
; chlorophyll
; enzyme activity
; gene expression
; genotype
; host plant
; legume
; metabolism
; nitrogen fixation
; population growth
; Acyrthosiphon pisum
; Aphididae
; Hexapoda
; Medicago truncatula
; amino acid
; carbon dioxide
; animal
; aphid
; article
; bacteriocyte
; barrel medic
; biological nitrogen fixation
; Buchnera
; elevated CO2
; feeding behavior
; host parasite interaction
; metabolism
; parasitology
; pea aphid
; physiology
; population density
; Acyrthosiphon pisum
; amino acid
; bacteriocyte
; biological nitrogen fixation
; elevated CO2
; Medicago truncatula
; Amino Acids
; Animals
; Aphids
; Buchnera
; Carbon Dioxide
; Feeding Behavior
; Host-Parasite Interactions
; Medicago truncatula
; Population Density
英文摘要: Rising atmospheric CO2 levels can dilute the nitrogen (N) resource in plant tissue, which is disadvantageous to many herbivorous insects. Aphids appear to be an exception that warrants further study. The effects of elevated CO2 (750 ppm vs. 390 ppm) were evaluated on N assimilation and transamination by two Medicago truncatula genotypes, a N-fixing-deficient mutant (dnf1) and its wild-type control (Jemalong), with and without pea aphid (Acyrthosiphon pisum) infestation. Elevated CO2 increased population abundance and feeding efficiency of aphids fed on Jemalong, but reduced those on dnf1. Without aphid infestation, elevated CO2 increased photosynthetic rate, chlorophyll content, nodule number, biomass, and pod number for Jemalong, but only increased pod number and chlorophyll content for dnf1. Furthermore, aphid infested Jemalong plants had enhanced activities of N assimilation-related enzymes (glutamine synthetase, Glutamate synthase) and transamination-related enzymes (glutamate oxalate transaminase, glutamine phenylpyruvate transaminase), which presumably increased amino acid concentration in leaves and phloem sap under elevated CO2. In contrast, aphid infested dnf1 plants had decreased activities of N assimilation-related enzymes and transmination-related enzymes and amino acid concentrations under elevated CO2. Furthermore, elevated CO2 up-regulated expression of genes relevant to amino acid metabolism in bacteriocytes of aphids associated with Jemalong, but down-regulated those associated with dnf1. Our results suggest that pea aphids actively elicit host responses that promote amino acid metabolism in both the host plant and in its bacteriocytes to favor the population growth of the aphid under elevated CO2. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62327
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: State Key Laboratory of Integrated Management of Pest and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China; Graduate School, Chinese Academy of Sciences, Beijing, 100039, China; Department of Entomology, Texas A and M University, College Station, TX, 77843, United States
Recommended Citation:
Guo H.,Sun Y.,Li Y.,et al. Pea aphid promotes amino acid metabolism both in Medicago truncatula and bacteriocytes to favor aphid population growth under elevated CO2[J]. Global Change Biology,2013-01-01,19(10)