BTB-TAZ Domain Protein PpBT3 modulates peach bud endodormancy by interacting with PpDAM5. (September 2021)

• Record Type: Journal Article
• Authors: Zhang, Xinhao; Shen, Hongyan; Wen, Binbin; Li, Sen; Xu, Chen; Gai, Yu; Meng, Xiangguang; He, Huajie; Wang, Ning; Li, Dongmei; Chen, Xiude; Xiao, Wei; Fu, Xiling; Tan, Qiuping; Li, Ling
• Is Part Of: Plant science. Volume 310(2021)
• Publication Date: 2021-09
• Subjects: Prunus persica -- Bud endodormancy -- BTB-TAZ Domain Protein PpBT3 -- Dormancy-associated MADS-box 5; Botany -- Periodicals; Botanique -- Périodiques; 580
• DOI: 10.1016/j.plantsci.2021.110956
• Languages: English
• ISSNs: 0168-9452

Abstract

Highlights: BTB-TAZ Domain Protein PpBT3 could modulates peach bud endodormancy. BTB-TAZ Domain Protein PpBT3 could interact with PpDAM5. Over-expressing PpBT3 in A. thaliana promoted seed germination. Over-expressing PpBT3 in A. thaliana conferred resistance to ABA-mediated germination inhibition. Abstract: The dormancy-associated MADS-box (DAM) gene DAM5 has crucial roles in bud endodormancy; however, the molecular regulatory mechanism of PpDAM5 in peach ( Prunus persica ) has not been elucidated. In this study, using yeast two-hybrid screening, we isolated a BTB-TAZ Domain Protein PpBT3, which interacts with PpDAM5 protein, in the peach cultivar 'Chun xue'. As expected, we found that abscisic acid (ABA) maintained bud endodormancy and induced expression of the PpDAM5 gene, and that over-expressing PpDAM5 in Arabidopsis thaliana repressed seed germination. In contrast, over-expressing PpBT3 in A. thaliana promoted seed germination, and conferred resistance to ABA-mediated germination inhibition. Additionally, a qRT-PCR (quantitative real-time polymerase chain reaction) experiment suggested that the transcript level of PpBT3 gradually increased towards the endodormancy release period, which is the opposite trend of the expression pattern of PpDAM5 . Our results suggest that PpBT3 modulates peach bud endodormancy by interacting with PpDAM5, thus revealing a new mechanism for regulating bud dormancy of perennial deciduous trees.