Feeding by Whiteflies Suppresses Downstream Jasmonic Acid Signaling by Eliciting Salicylic Acid Signaling

Phloem-feeding whiteflies in the species complex Bemisia tabaci cause extensive crop damage worldwide. One of the reasons for their “success” is their ability to suppress the effectual jasmonic acid (JA) defenses of the host plant. However, little is understood about the mechanisms underlying whitef...

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Bibliographic Details
Published in:Journal of chemical ecology 2013-05, Vol.39 (5), p.612-619
Main Authors: Zhang, Peng-Jun, Li, Wei-Di, Huang, Fang, Zhang, Jin-Ming, Xu, Fang-Cheng, Lu, Yao-Bin
Format: Article
Language:English
Subjects:
Agriculture
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Arabidopsis - physiology
Arabidopsis Proteins - genetics
Arabidopsis thaliana
Bemisia tabaci
Biochemistry
Biological and medical sciences
Biological Microscopy
Biomedical and Life Sciences
Chemical ecology
Crop damage
Crops
Cyclopentanes - metabolism
DNA-Binding Proteins - genetics
Ecology
Endopeptidases - genetics
Entomology
Female
Fundamental and applied biological sciences. Psychology
Gene expression
Gene Expression Regulation, Plant
General aspects
Hemiptera - physiology
Herbivory
Insects
Life Sciences
Male
Oxidoreductases - genetics
Oxylipins - metabolism
Plant pathology
Plant resistance
Salicylic Acid - metabolism
Signal Transduction
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Summary:Phloem-feeding whiteflies in the species complex Bemisia tabaci cause extensive crop damage worldwide. One of the reasons for their “success” is their ability to suppress the effectual jasmonic acid (JA) defenses of the host plant. However, little is understood about the mechanisms underlying whitefly suppression of JA-regulated defenses. Here, we showed that the expression of salicylic acid (SA)-responsive genes ( EDS1 and PR1 ) in Arabidopsis thaliana was significantly enhanced during feeding by whitefly nymphs. Whereas upstream JA-responsive genes ( LOX2 and OPR3 ) also were induced, the downstream JA-responsive gene ( VSP1 ) was repressed, i.e., whiteflies only suppressed downstream JA signaling. Gene-expression analyses with various Arabidopsis mutants, including NahG , npr-1 , ein2-1 , and dde2-2 , revealed that SA signaling plays a key role in the suppression of downstream JA defenses by whitefly feeding. Assays confirmed that SA activation enhanced whitefly performance by suppressing downstream JA defenses.
ISSN:0098-0331
1573-1561
DOI:10.1007/s10886-013-0283-2