| Title: | Jasmonates mediate plant defense responses to Spodoptera exigua herbivory in tomato and maize foliage |
| Author(s): | Al-Zahrani W; Bafeel SO; El-Zohri M; |
| Address: | "Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. Department of Botany and Microbiology, Faculty of Science, Assiut University, Assiut, Egypt" |
| DOI: | 10.1080/15592324.2020.1746898 |
| ISSN/ISBN: | 1559-2324 (Electronic) 1559-2316 (Print) 1559-2316 (Linking) |
| Abstract: | "Plants evolve diverse strategies to cope with herbivorous insects, in which the lipid-derived phytohormone jasmonic acid (JA) plays a crucial role. This study was conducted to investigate the differential responses of tomato and maize plants to Spodoptera exiguaherbivory and to clarify the role played by JA, methyl-jasmonate (MeJA) and jasmonoyl-L-isoleucine (JA-L-Ile) in their defense responses. JA, MeJA and JA-L-Ile were quantified using HPLC-MS/MS. The results showed that maize plant was more tolerant toS. exiguaherbivory than tomato. Spodopteraexigua attack induced JA, MeJA, and JA-L-Ile to high levels after 2 h of infestation in both test plants. Then, all studied JAsconcentration decreased gradually by increasing infestation time up to 1 week. JA concentration in infested maize was much higher than that in infested tomato leaves. However, MeJA concentration in infested tomato leaves was higher than that in maize. In control plants, JA was not recorded, while MeJA was recorded in comparable values both in tomato and maize. Our results showed that JA plays the main role in increasing defense responses to S. exigua infestation in the studied plants as a direct signaling molecule; however, MeJA could play an indirect role by inducing JA accumulation. JA-L-Ile indicated a less efficient role in defense responses to S. exigua attack in both test plants where its level is much lower than JA and MeJA" |
| Keywords: | "Acetates/metabolism Animals Cyclopentanes/*metabolism Gene Expression Regulation, Plant Herbivory Isoleucine/analogs & derivatives/metabolism Solanum lycopersicum/*metabolism/*parasitology Oxylipins/*metabolism Spodoptera/*pathogenicity Tandem Mass Spectr;" |
| Notes: | "MedlineAl-Zahrani, Wafaa Bafeel, Sameera O El-Zohri, Manal eng Research Support, Non-U.S. Gov't 2020/04/16 Plant Signal Behav. 2020 May 3; 15(5):1746898. doi: 10.1080/15592324.2020.1746898. Epub 2020 Apr 14" |
