| Title: | Jasmonoyl-l-isoleucine and allene oxide cyclase-derived jasmonates differently regulate gibberellin metabolism in herbivory-induced inhibition of plant growth |
| Author(s): | Yang F; Tang J; Yang D; Yang T; Liu H; Luo W; Wu J; Jianqiang W; Wang L; |
| Address: | "Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China. Tobacco Breeding and Biotechnology Research Center, Yunnan Academy of Tobacco Agricultural Sciences, Key Laboratory of Tobacco Biotechnological Breeding, National Tobacco Genetic Engineering Research Center, Kunming 650021, China. Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; University of Chinese Academy of Sciences, Beijing 100049, China. Department of Economic Plants and Biotechnology, Yunnan Key Laboratory for Wild Plant Resources, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China. Electronic address: leiwang@mail.kib.ac.cn" |
| DOI: | 10.1016/j.plantsci.2020.110627 |
| ISSN/ISBN: | 1873-2259 (Electronic) 0168-9452 (Linking) |
| Abstract: | "The trade-off between plant growth and resistance to herbivory is thought to be at least partly mediated by the interactions between jasmonates and gibberellins (GAs). Insect herbivory activates jasmonate biosynthesis and signaling, and plant growth is concomitantly inhibited. Whether or not the herbivory-induced jasmonates suppress the accumulation of GAs and thus reduce plant growth, and which jasmonates are functional in this process, remain unclear. In this study, we show that herbivory-induced stunted growth of Nicotiana attenuata was completely dependent on allene oxide cyclase (AOC) and coronatine insensitive1 (COI1), which encode a JA biosynthetic enzyme and the receptor, respectively, but only partially dependent on jasmonic acid-isoleucine conjugate (JA-Ile), the bioactive jasmonate. Quantification of GAs and exogenous treatments indicated that herbivory-induced growth inhibition was caused by GA(4) deficiency, and that the reduction in GA(4) accumulation was strongly associated with both decreased concentrations of GA biosynthetic gene transcripts and transcriptional activation of GA catabolic genes. We further show that JA-Ile only positively regulated the levels of GA catabolic genes, while the accumulation of GA biosynthetic gene transcripts was controlled by certain AOC-derived jasmonate(s) rather than by JA-Ile. This work sheds light on the mechanisms by which plants adapt to herbivory by using intricate phytohormone signaling and transcriptional regulatory networks" |
| Keywords: | "Animals Cyclopentanes/*metabolism Gene Expression Regulation, Plant Genetic Variation Genotype Gibberellins/*metabolism Herbivory Intramolecular Oxidoreductases/*metabolism Oxylipins/*metabolism Plant Development/physiology Plant Growth Regulators/metabol;" |
| Notes: | "MedlineYang, Fei Tang, Jinxiang Yang, Dahai Yang, Tianyu Liu, Hui Luo, Wanni Wu, Jinsong Jianqiang, Wu Wang, Lei eng Ireland 2020/11/13 Plant Sci. 2020 Nov; 300:110627. doi: 10.1016/j.plantsci.2020.110627. Epub 2020 Aug 16" |
