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Molecular And Functional Characterization Of E.licitor Pebc1 Extracted From B otrytis Cinerea Involved In The Induction Of Resistance Against Green Peach Aphid (Myzus Persicae) In Common Beans (Phaseolus Vulgaris L.)

文献类型： 外文期刊

作者： Majeed, Muhammad Zeeshan;Nazir, Talha;Hanan, Abdul;Qiu, Dewen;Basit, Abdul

作者机构：

关键词： elicitor proteins; PeBC1; Myzus persicae; life-history traits; jasmonic acid pathway; salicylic acid pathway

期刊名称： INSECTS

ISSN： 2075-4450

年卷期： 2019 年 10 卷 2 期

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摘要： Elicitors are biofactors that induce resistance in plants against different insect pests. This in vitro study evaluated the impact of a novel elicitor protein PeBC1, extracted from a necrotrophic fungus Botrytis cinerea, on the development and fecundity parameters of green peach aphid (Myzus persicae) on common beans (Phaseolus vulgaris L.). Three different concentrations of PeBC1 elicitor (i.e., 33.56, 25.43, 19.33 mu g mL(-1)) were applied at three different temperature regimes (i.e., 18, 21, and 25 degrees C). Elicitor treatments were applied topically on the bean plants at 3-leaf stage and newly emerged (0-6 h old) apterous adult aphids were exposed to these treated leaves. In addition to the biological parameters of aphids, the relative expression levels of key genes associated with jasmonic acid (JA) and salicylic acid (SA) plant defense pathways were also determined through RT-qPCR. Results of bioassays revealed that the application of PeBC1 elicitor protein exhibited pronounced and significant (p < 0.05) sub-lethal effects on green peach aphids. The fecundity was reduced and the nymphal development time was prolonged by different concentrations of PeBC1 elicitor and temperature regimes. Gene expression studies showed that the exogenous application of PeBC1 induced a significant upregulation of the expression levels of JA and SA pathway-associated genes in bean plants. As compared to control, elicitor-treated plants exhibited an induced resistance against aphids. Our findings suggest the potential use of PeBC1 elicitor protein in future bio-intensive management strategies against sap-sucking insect pests such as green peach aphids.

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