A zinc finger protein BBX19 interacts with ABF3 to affect drought tolerance negatively in chrysanthemum

• DOI: 10.1111/tpj.14863
• Publication Date: 2020-06-03T05:47:35Z
• Authors: Yanjie Xu; Xin Zhao; Palinuer Aiwaili; Xianying Mu; Meng Zhao; Jian Zhao; Lina Cheng; Chao Ma; Junping Gao; Bo Hong
• Keywords: Drought Tolerance

Drought is an environmental factor that can severely influence plant development and distribution, greatly affect the yield economic value of crops. We characterized CmBBX19, a BBX family subgroup IV member gene, from transcriptome database Chrysanthemum morifolium in response to drought stress. stress ABA treatments downregulated expression CmBBX19. generated CmBBX19-overexpressing (CmBBX19-OX) lines CmBBX19-suppressing (CmBBX19-RNAi), found suppressed CmBBX19 led enhanced tolerance compared with wild-type (WT) controls, while CmBBX19-OX exhibited reduced tolerance. Downstream gene analysis showed modulates mainly through inducing changes ABA-dependent pathway genes, including protective protein, redox balance cell wall biogenesis such as responsive 18, peroxidase 12, cellulose synthase-like protein G2. Moreover, was shown interact CmABF3, master signaling component, suppress these downstream genes. conclude BBX19-ABF3 module functions regulation chrysanthemum pathway.