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Environ Entomol

Title:		Reduction in the fitness of Bemisia tabaci fed on three previously infested tomato genotypes differing in the jasmonic acid pathway
Author(s):		Cui H; Sun Y; Su J; Li C; Ge F;
Address:		"State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, PR China"
Journal Title:		Environ Entomol
Year:		2012
Volume:		41
Issue:		6
Page Number:		1443 - 1453
DOI:		10.1603/EN11264
ISSN/ISBN:		1938-2936 (Electronic) 0046-225X (Linking)
Abstract:		"The effect of previous infestation (preconditioning) by the whitefly Bemisia tabaci (Gennadius) biotype B on the population fitness of subsequent infestations that fed on three isogenic tomato genotypes (wild-type [Wt], a jasmonic acid [JA] defense-enhanced genotype [35S], and a JA-deficient genotype [spr2]) was examined. We tested the hypotheses that whiteflies fed on preconditioned tomatoes (Solanum lycopersicum L.) would have reduced fitness and that the effect would be mediated via the JA-dependent systemic plant defense pathway. Preconditioning by the whitefly resulted in decreased levels of soluble sugars and free amino acids and increased salicylic acid (SA), total phenolics, and condensed tannins for all three genotypes. The durations of the larval and pupal stages were prolonged in whiteflies fed on the preconditioned plants compared with those that fed on control plants. Furthermore, preconditioning resulted in reduced fecundity and intrinsic rate of increase (r(m)) of the whiteflies that subsequently fed on the three tomato genotypes. Whiteflies were more likely to feed and deposit eggs on control plants than on preconditioned plants. Our results indicate that preconditioning induced decreases in leaf nutrients and increased induction of an SA based defense that degraded the quality of the substrate as evidenced by an increased developmental time and reduced fecundity of whiteflies that subsequently fed on them"
Keywords:		Amino Acids/metabolism Animals Carbohydrate Metabolism Cyclopentanes/*metabolism Fertility Genotype Hemiptera/growth & development/*physiology Herbivory Solanum lycopersicum/genetics/*metabolism Oviposition Oxylipins/*metabolism Phenols/metabolism Proanth;
Notes:		"MedlineCui, Hongying Sun, Yucheng Su, Jianwei Li, Chuanyou Ge, Feng eng Research Support, Non-U.S. Gov't England 2013/01/17 Environ Entomol. 2012 Dec; 41(6):1443-53. doi: 10.1603/EN11264"