文献类型： 外文期刊
作者： Li, Ying 1 ; Yuan, Wenmin 1 ; Peng, Jialuo 1 ; Ju, Jisheng 1 ; Ling, Pingjie 1 ; Guo, Xuefeng 1 ; Yang, Junning 1 ; Ma, Qi 2 ; Lin, Hai 2 ; Li, Jilian 2 ; Wang, Caixiang 1 ; Su, Junji 1 ;
作者机构： 1.Gansu Agr Univ, Coll Life Sci & Technol, Gansu Prov Key Lab Aridland Crop Sci, Lanzhou 730070, Peoples R China
2.Xinjiang Acad Agr & Reclamat Sci, Cotton Res Inst, Shihezi 832000, Peoples R China
关键词： Upland cotton; Early maturity; Gibberellic acid (GA); Virus-induced gene silencing (VIGS); Favorable allele; Flowering time
期刊名称：PLANT CELL REPORTS （ 2023影响因子：5.3； 五年影响因子：5.3 ）
ISSN： 0721-7714
年卷期： 2024 年 43 卷 7 期
收录情况： SCI
摘要： Key message The silencing ofGhGASA14and the identification of superior allelic variation in its coding region indicate thatGhGASA14may positively regulate flowering and the response to GA(3). Gibberellic acid-stimulated Arabidopsis (GASA), a member of the gibberellin-regulated short amino acid family, has been extensively investigated in several plant species and found to be critical for plant growth and development. However, research on this topic in cotton has been limited. In this study, we identified 38 GhGASAs that were dispersed across 18 chromosomes in upland cotton, and all of these genes had a GASA core domain. Transcriptome expression patterns and qRT-PCR results revealed that GhGASA9 and GhGASA14 exhibited upregulated expression not only in the floral organs but also in the leaves of early-maturing cultivars. The two genes were functionally characterized by virus-induced gene silencing (VIGS), and the budding and flowering times after silencing the target genes were later than those of the control (TRV:00). Compared with that in the water-treated group (MOCK), the flowering period of the different fruiting branches in the GA(3)-treated group was more concentrated. Interestingly, allelic variation was detected in the coding sequence of GhGASA14 between early-maturing and late-maturing accessions, and the frequency of this favorable allele was greater in high-latitude cotton cultivars than in low-latitude ones. Additionally, a significant linear relationship was observed between the expression level of GhGASA14 and flowering time among the 12 upland cotton accessions. Taken together, these results indicated that GhGASA14 may positively regulate flowering time and respond to GA(3). These findings could lead to the use of valuable genetic resources for breeding early-maturing cotton cultivars in the future.
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