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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2017年54 No.2

Identifying tobacco strains resistant to Myzus persicae (Sulzer) and investigating the mechanism responsible for resistance to this pest
Author of the article:ZHOU Ting-Ting** LIN Hua-Feng*** WANG Yan-Qiu PAN Jing ZHANG Bang-Xian
Author's Workplace:School of Plant Protection, Anhui Agricultural University, Heifei 230036, China
Key Words:Myzus persicae (Sulzer), tobacco varieties, trichome density, chemical components, resistance to insects
Abstract:

 [Objectives]  To explore the mechanisms underlying the resistance of tobacco to Myzus persicae (Sulzer), provide a theoretical basis for breeding resistant tobacco varieties and developing comprehensive prevention and control methods for M. persicae. [Methods]  We quantified the developmental duration, fecundity and survival rates of M. persicae on 20 tobacco varieties with a new leaf-disc assay, and measured the soluble protein, pH, chlorophyll content and leaf trichome density of fresh leaves of each variety. [Results]  Adult longevity, fecundity, duration of the nymph period, and survival, were significantly different on different tobacco varieties. Among the varieties examined, Minyan57, Minyan7 and Zhongyan102 had weak resistance, but Minyan38, Guiyan3 and Yunyan97 were highly resistant. There was no obvious difference in the pH of fresh leaves of the different varieties, but there were highly significant, positive, correlations between trichome density, soluble protein content, chlorophyll a and chlorophyll pigment content of each tobacco variety and the number of M. persicae adults found on plants of each variety. M. persicae preferred varieties with high trichome density, and high soluble protein and chlorophyll content. [Conclusion]  Of the 20 tobacco varieties tested, Minyan38, Guiyan3 and Yunyan97 were the most highly resistant to M. persicae. Tobacco varieties with low trichome density, and low soluble protein and chlorophyll content, were more resistant to M. persicae.

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