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Int. J. Mol. Sci. 2016, 17(12), 1964; doi:10.3390/ijms17121964

Elevated O3 and TYLCV Infection Reduce the Suitability of Tomato as a Host for the Whitefly Bemisia tabaci

1
Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
2
State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
3
Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Massimo Maffei and Francesca Barbero
Received: 1 September 2016 / Revised: 4 November 2016 / Accepted: 16 November 2016 / Published: 28 November 2016
(This article belongs to the Special Issue Plant-Insect Interactions)
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Abstract

The effects of elevated atmospheric ozone (O3) levels on herbivorous insects have been well studied, but little is known about the combined effects of elevated O3 and virus infection on herbivorous insect performance. Using open-top chambers in the field, we determined the effects of elevated O3 and Tomato yellow leaf curl virus (TYLCV) infection on wild-type (Wt) tomato and 35S tomato (jasmonic acid (JA) defense-enhanced genotype) in association with whitefly, Bemisia tabaci Gennadius biotype B. Elevated O3 and TYLCV infection, alone and in combination, significantly reduced the contents of soluble sugars and free amino acids, increased the contents of total phenolics and condensed tannins, and increased salicylic acid (SA) content and the expression of SA-related genes in leaves. The JA signaling pathway was upregulated by elevated O3, but downregulated by TYLCV infection and O3 + TYLCV infection. Regardless of plant genotype, elevated O3, TYLCV infection, or O3 + TYLCV infection significantly decreased B. tabaci fecundity and abundance. These results suggest that elevated O3 and TYLCV infection, alone and in combination, reduce the nutrients available for B. tabaci, increase SA content and SA-related gene expression, and increase secondary metabolites, resulting in decreases in fecundity and abundance of B. tabaci in both tomato genotypes. View Full-Text
Keywords: Bemisia tabaci; elevated O3; jasmonic acid; salicylic acid; Tomato yellow leaf curl virus Bemisia tabaci; elevated O3; jasmonic acid; salicylic acid; Tomato yellow leaf curl virus
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Cui, H.; Sun, Y.; Chen, F.; Zhang, Y.; Ge, F. Elevated O3 and TYLCV Infection Reduce the Suitability of Tomato as a Host for the Whitefly Bemisia tabaci. Int. J. Mol. Sci. 2016, 17, 1964.

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