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- Title
BegomovirusAssociated Betasatellite Virulence Factor bC1 Attenuates Tobacco Defense to Whiteflies via Interacting With Plant SKP1.
- Authors
Chi Zou; Yan-Ni Shu; Jing-Jing Yang; Li-Long Pan; Jing Zhao; Na Chen; Shu-Sheng Liu; Xiao-Wei Wang
- Abstract
Plant-mediated interactions between plant viruses and their vectors are important determinants of the population dynamics of both types of organisms in the field. The whitefly Bemisia tabaci can establish mutualism with begomoviruses via their shared host plants. This mutualism is achieved by the interaction between virulence factors and their host proteins. While the virulence factor bC1 encoded by tomato yellow leaf curl China betasatellite (TYLCCNB), a subviral agent associated to the begomovirus tomato yellow leaf curl China virus (TYLCCNV), may interact with plant protein MYC2, thereby establishing the indirect mutualism between TYLCCNV and whitefly, whether other mechanisms are involved remains unknown. Here, we found the in vitro and in vivo interactions between bC1 and tobacco protein S-phase kinase associated protein 1 (NtSKP1). Silencing the expression of NtSKP1 enhanced the survival rate and fecundity of whiteflies on tobacco plants. NtSKP1 could activate the transcription of genes in jasmonic acid (JA) pathways by impairing the stabilization of JAZ1 protein. Moreover, bC1-NtSKP1 interaction could interfere JAZ1 degradation and attenuate the plant JA defense responses. These results revealed a novel mechanism underlying the better performance of whiteflies on TYLCCNV/TYLCCNB-infected plants.
- Publication
Frontiers in Plant Science, 2020, Vol 11, p1
- ISSN
1664-462X
- Publication type
Article
- DOI
10.3389/fpls.2020.574557