Genome-wide identification of boron transporters (GhBORs) in upland cotton and the role of GhBOR1 in promoting flowering
陆地棉中硼转运蛋白（GhBORs）的全基因组鉴定及GhBOR1在促进开花中的作用
- 关键词：
- 来源：
- BMC Plant Biology
- 类型：
- 学术文献
- 语种：
- 英语
- 原文发布日期：
- 2025-10-21
- 摘要：
- BackgroundBoron (B) is a vital trace element necessary for the healthy growth and development of plants and significantly affects agricultural productivity. The efficient absorption and transport of boron in plants is mainly mediated by boron effector transporters encoded by the BOR gene family. However, research on the boron transporter (BOR) in cotton has been limited.ResultsIn this research, we identified 50 BOR proteins across three cotton species that presented conserved structural features and functions. Phylogenetic analysis revealed that the BOR proteins of different cotton species can be divided into four subfamilies, with most of the BOR proteins from upland cotton assigned to subfamily III. Synteny analysis suggested that gene duplication and rearrangement played a role in the evolution of cotton from diploids to tetraploids. qRT-PCR analysis revealed that GhBOR1 expression was upregulated not only in the leaf tissues but also in the leaves of early-maturity cultivars. We further verified the function of this gene using VIGS. Compared with the control plants (TRV:00), the GhBOR1 gene-silenced plants presented delayed flowering and decreased pollen viability, suggesting that GhBOR1 played a crucial role in regulating flowering time and pollen viability in cotton. Furthermore, silencing GhBOR1 also influenced the expression of critical genes involved in flowering regulation, suggesting that GhBOR1 might promote flowering by regulating the activity of these genes.ConclusionA total of 23 GhBORs were identified in upland cotton, among which GhBOR1 played a pivotal role in controlling flowering time and pollen viability, providing genetic resources for breeding for early maturity.
- 所属专题：
- 171
