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Int. J. Mol. Sci. 2016, 17(7), 1048; doi:10.3390/ijms17071048

The Salicylic Acid-Mediated Release of Plant Volatiles Affects the Host Choice of Bemisia tabaci

Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha 410125, China
Department of Entomology, University of Kentucky, Lexington, KY 40546, USA
Author to whom correspondence should be addressed.
Academic Editors: Massimo Maffei and T. G. Emyr Davies
Received: 25 February 2016 / Revised: 29 May 2016 / Accepted: 23 June 2016 / Published: 30 June 2016
(This article belongs to the Special Issue Plant-Insect Interactions)
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The whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) causes serious crop losses worldwide by transmitting viruses. We have previously shown that salicylic acid (SA)-related plant defenses directly affect whiteflies. In this study, we applied exogenous SA to tomato plants in order to investigate the interaction between SA-induced plant volatiles and nonviruliferous B. tabaci B and Q or B- and Q-carrying tomato yellow leaf curl virus (TYLCV). The results showed that exogenous SA caused plants to repel nonviruliferous whiteflies, but the effect was reduced when the SA concentration was low and when the whiteflies were viruliferous. Exogenous SA increased the number and quantity of plant volatiles—especially the quantity of methyl salicylate and δ-limonene. In Y-tube olfactometer assays, methyl salicylate and δ-limonene repelled the whiteflies, but the repellency was reduced for viruliferous Q. We suggest that the release of plant volatiles as mediated by SA affects the interaction between whiteflies, plants, and viruses. Further studies are needed to determine why viruliferous Q is less sensitive than nonviruliferous Q to repellent plant volatiles. View Full-Text
Keywords: Bemisia tabaci; choice test; salicylic acid; plant volatile; plant–insect interaction Bemisia tabaci; choice test; salicylic acid; plant volatile; plant–insect interaction

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Shi, X.; Chen, G.; Tian, L.; Peng, Z.; Xie, W.; Wu, Q.; Wang, S.; Zhou, X.; Zhang, Y. The Salicylic Acid-Mediated Release of Plant Volatiles Affects the Host Choice of Bemisia tabaci. Int. J. Mol. Sci. 2016, 17, 1048.

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