Characterization and regulatory mechanism analysis of VvmiR156a-VvAGL80 pair during grapevine flowering and parthenocarpy process induced by gibberellin
文献类型: 外文期刊
作者: Su, Ziwen 1 ; Xuan, Xuxian 1 ; Sheng, Zilu 1 ; Wang, Fei 1 ; Zhang, Xiaowen 1 ; Ye, Dongdong 1 ; Wang, Xicheng 2 ; Dong, Tianyu 1 ; Pei, Dan 1 ; Zhang, Peian 1 ; Fang, Jinggui 1 ; Wang, Chen 1 ;
作者机构: 1.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Pomol, Nanjing 210014, Peoples R China
期刊名称:PLANT GENOME ( 影响因子:4.219; 五年影响因子:5.826 )
ISSN:
年卷期: 2022 年 15 卷 1 期
页码:
收录情况: SCI
摘要: MicroRNA156 (miR156) is an important conserved miRNA family in plants. Recently, we revealed VvmiR156a could involve in the modulation of gibberellin (GA)-mediated flower and berry development process of grapevine (Vitis vinifera L.). However, how to manipulate this process is unclear. For this, we used the GA-induced grapevine parthenocarpy system to investigate the regulatory roles of VvmiR156a during this process. Here, we cloned the mature and precursor sequences of VvmiR156a in Wink grape and identified its potential target gene VvAGL80, which belongs to the MADS-box gene family. Moreover, using RNA ligase-mediated 5 ' rapid amplification of cDNA ends (RLM-RACE) and poly(A)polymerase-mediated 3 ' rapid amplification of cDNA (PPM-RACE) technologies, it confirmed that VvAGL80 was the true target gene of VvmiR159a. Analysis of promoter cis-elements and beta-glucuronidase (GUS) staining showed that both VvmiR156a and VvAGL80 contained GA-responsive elements and could respond to GA treatments. Quantitative real-time-polymerase chain reaction (qRT-PCR) analysis exhibited the VvmiR156a and VvAGL80 showed opposite expression trends during grapevine flower and berry development, indicating that VvmiR156a negatively regulated the expression of VvAGL80 during this process. After GA treatment, the expression of miR156 in flowers was downregulated significantly, while that of VvAGL80 was upregulated, thereby accelerating grapevine flowering. Furthermore, GA treatment enhanced the negative regulation of VvmiR156a on VvAGL80 in seed, especially at the seed-coat hardening stage, which was the key period of seed growth and development. Our findings enriched the knowledge of the regulatory mechanism of the miRNA-mediated grapevine parthenocarpy process.
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