Different effects of exogenous jasmonic acid on preference and performance of viruliferous Bemisia tabaci B and Q |
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| Authors: | Xiaobin Shi Huipeng Pan Wen Xie Shaoli Wang Qingjun Wu Gong Chen Lixia Tian Xuguo Zhou Yong Liu Youjun Zhang |
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| Affiliation: | 1. Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Academy of Agricultural Science, Hunan Plant Protection Institute, Changsha, China;2. Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China;3. Department of Entomology, University of Kentucky, Lexington, KY, USA |
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| Abstract: | The sweetpotato whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae), B and Q biotypes have caused severe losses to crops and vegetables through virus transmission. Our previous studies showed that Q is more efficient than B in acquisition and transmission of tomato yellow leaf curl virus (TYLCV) and viruliferous Q is better equipped than B in counterattacking jasmonic acid (JA)‐related plant defense. To understand how plant‐mediated defensive responses involving JA affect insect vectors within a tritrophic framework of plants, insects, and viruses, we examined the effects of exogenous JA on preference and performance of non‐viruliferous and viruliferous B and Q on tomato plants (Solanum lycopersicum L., Solanaceae). Our results demonstrated a significantly lower fecundity, shorter longevity, shorter developmental time, and lower survival rate of whiteflies on JA‐treated than on control plants. In addition, viruliferous Q performed significantly better than B in fecundity, longevity, developmental time, and survival rate. When given a choice between JA‐treated and control tomato plants, viruliferous Q was not repelled to JA‐treated plants when the JA concentration was 0.01 and 0.1 mm , whereas others all preferred the untreated control plants. Exogenous JA increased the concentration and the composition of plant volatiles, such as α‐terpinene and β‐ocimene, which deterred whiteflies in a Y‐tube bioassay. It is worth noting that Q has a mutualistic relationship with TYLCV to counteract the host defenses. A better understanding of tritrophic interactions between plants, insects, and viruses will facilitate the development of sustainable management of this invasive global pest. |
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| Keywords: |
tomato yellow leaf curl virus
sweetpotato whitefly Hemiptera Aleyrodidae JA tritrophic framework plant defense tomato
Solanum lycopersicum
Solanaceae |
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