| Title: | "Antagonistic plant defense system regulated by phytohormones assists interactions among vector insect, thrips and a tospovirus" |
| Author(s): | Abe H; Tomitaka Y; Shimoda T; Seo S; Sakurai T; Kugimiya S; Tsuda S; Kobayashi M; |
| Address: | "Experimental Plant Division, RIKEN BioResource Center, Tsukuba, Japan. ahiroshi@rtc.riken.jp" |
| ISSN/ISBN: | 1471-9053 (Electronic) 0032-0781 (Linking) |
| Abstract: | "The western flower thrips (Frankliniella occidentalis) is a polyphagous herbivore that causes serious damage to many agricultural plants. In addition to causing feeding damage, it is also a vector insect that transmits tospoviruses such as Tomato spotted wilt virus (TSWV). We previously reported that thrips feeding on plants induces a jasmonate (JA)-regulated plant defense, which negatively affects both the performance and preference (i.e. host plant attractiveness) of the thrips. The antagonistic interaction between a JA-regulated plant defense and a salicylic acid (SA)-regulated plant defense is well known. Here we report that TSWV infection allows thrips to feed heavily and multiply on Arabidopsis plants. TSWV infection elevated SA contents and induced SA-regulated gene expression in the plants. On the other hand, TSWV infection decreased the level of JA-regulated gene expression induced by thrips feeding. Importantly, we also demonstrated that thrips significantly preferred TSWV-infected plants to uninfected plants. In JA-insensitive coi1-1 mutants, however, thrips did not show a preference for TSWV-infected plants. In addition, SA application to wild-type plants increased their attractiveness to thrips. Our results suggest the following mechanism: TSWV infection suppresses the anti-herbivore response in plants and attracts its vector, thrips, to virus-infected plants by exploiting the antagonistic SA-JA plant defense systems" |
| Keywords: | "Animals Arabidopsis/genetics/*immunology/*parasitology/virology Cyclopentanes/*metabolism Gene Expression Regulation, Plant Host-Parasite Interactions Insect Vectors/*physiology Oxylipins/*metabolism Plant Diseases/virology Salicylic Acid/*antagonists & i;" |
| Notes: | "MedlineAbe, Hiroshi Tomitaka, Yasuhiro Shimoda, Takeshi Seo, Shigemi Sakurai, Tamito Kugimiya, Soichi Tsuda, Shinya Kobayashi, Masatomo eng Research Support, Non-U.S. Gov't Japan 2011/12/20 Plant Cell Physiol. 2012 Jan; 53(1):204-12. doi: 10.1093/pcp/pcr173. Epub 2011 Dec 15" |
