Journal
NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA
Volume 48, Issue 2, Pages 705-+Publisher
UNIV AGR SCI & VETERINARY MED CLUJ-NAPOCA
DOI: 10.15835/nbha48211901
Keywords
elicitor protein; jasmonic acid pathway; induced resistance; life-history traits; Myzus persicae; PeBA1; plant defense hormones; salicylic acid pathway
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Funding
- National Key Research and Development of China [2017YFD0200900]
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Bacterial microbe-associated molecular patterns (MAMPs) play an important role in innate plant immunity. This in vitro study evaluated the putative role of protein elicitor PeBA1 derived from Bacillus amyloliquefaciens NC6 strain in eliciting induced resistance type responses in common bean (Phaseolus vulgaris) plants against green peach aphid Myzus persicae. Nymphal developmental time of aphids was significantly prolonged and the fecundity was significantly reduced by different concentrations of PeBA1 elicitor (i.e. 40.51, 24.91 and 16.38 mu g mL(-1)) applied at three different temperature regimes (i.e. 21, 27 and 30 degrees C). Moreover, foliar application of PeBA1 elicitor protein strongly up-regulated the expression levels of salicylic acid (SA) pathway-associated genes, while the expression levels of jasmonic acid GA) pathway-associated genes exhibited a moderate induction. Quantification by LC/MSMS revealed a linear increase of both SA and JA plant defense hormones along with the time of exposure. Our findings sunest that the bacterial elicitor protein PeBA1 could be used as an effective biological pest management tool against phloem-feeding insect pests such as green peach aphids M. persicae.
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