| Title: | Suppression of jasmonic acid-dependent defense in cotton plant by the mealybug Phenacoccus solenopsis |
| Author(s): | Zhang P; Zhu X; Huang F; Liu Y; Zhang J; Lu Y; Ruan Y; |
| Address: | "State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China" |
| DOI: | 10.1371/journal.pone.0022378 |
| ISSN/ISBN: | 1932-6203 (Electronic) 1932-6203 (Linking) |
| 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. solenopsis feeding inhibited the JA-regulated gossypol production, and prevented the induction of JA-related genes. We conclude that P. solenopsis is able to prevent the activation of JA-dependent defenses associated with basal resistance to mealybugs" |
| Keywords: | "Animals Choice Behavior/drug effects Cyclopentanes/*pharmacology Female Gene Expression Regulation, Plant/drug effects Genes, Plant/genetics Gossypium/drug effects/genetics/*immunology/*parasitology Gossypol/analysis Hemiptera/drug effects/*physiology Her;" |
| Notes: | "MedlineZhang, Pengjun Zhu, Xiaoyun Huang, Fang Liu, Yong Zhang, Jinming Lu, Yaobin Ruan, Yongming eng Research Support, Non-U.S. Gov't 2011/08/06 PLoS One. 2011; 6(7):e22378. doi: 10.1371/journal.pone.0022378. Epub 2011 Jul 27" |
