Aug 6, 2011

Suppression of jasmonic acid-dependent defense in cotton plant by the mealybug Phenacoccus solenopsis

PloS One
Peng-Jun ZhangYongming Ruan

Abstract

The solenopsis mealybug, Phenacoccus solenopsis, has been recently recognized as an aggressively invasive pest in China, and is now becoming a serious threat to the cotton industry in the country. Thus, it is necessary to investigate the molecular mechanisms employed by cotton for defending against P. solenopsis before the pest populations reach epidemic levels. Here, we examined the effects of exogenous jasmonic acid (JA), salicylic acid (SA), and herbivory treatments on feeding behavior and on development of female P. solenopsis. Further, we compared the volatile emissions of cotton plants upon JA, SA, and herbivory treatments, as well as the time-related changes in gossypol production and defense-related genes. Female adult P. solenopsis were repelled by leaves from JA-treated plant, but were not repelled by leaves from SA-treated plants. In contrast, females were attracted by leaves from plants pre-infested by P. solenopsis. The diverse feeding responses by P. solenopsis were due to the difference in volatile emission of plants from different treatments. Furthermore, we show that JA-treated plants slowed P. solenopsis development, but plants pre-infested by P. solenopsis accelerated its development. We also show that P. sol...Continue Reading

Mentioned in this Paper

Neuro-Oncological Ventral Antigen 2
Real-Time Polymerase Chain Reaction
Biochemical Pathway
Cedrene
Genes, Plant
Aphis chenopodii glauci preparation
Myzus persicae
Cross-talk
Arabidopsis
Jasmonic Acid Mediated Signaling Pathway

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