MicroRNAs behave differently to drought stress in drought-tolerant and drought-sensitive grape genotypes
文献类型： 外文期刊
作者： Guo, Shuihuan 1 ; Xu, Tengfei 3 ; Ju, Yanlun 1 ; Lei, Yulu 1 ; Zhang, Fuchun 4 ; Fang, Yulin 1 ; Zhang, Zhenwen 1 ; Jin, Lei 5 ; Meng, Jiangfei 1 ;
作者机构： 1.Northwest A&F Univ, Coll Enol, Yangling 712100, Shaanxi, Peoples R China
2.Henan Agr Univ, Coll Food Sci & Technol, Zhengzhou 450002, Henan, Peoples R China
3.Northwest A&F Univ, Coll Hort, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
4.Xinjiang Acad Agr Sci, Inst Hort Crops, Urumqi 830091, Xinjiang, Peoples R China
5.Ningxia Univ, Sch Agr, Yinchuan 750021, Ningxia, Peoples R China
关键词： Grapevine; Rootstocks; Drought tolerance; RNA-seq; MicroRNA
期刊名称：ENVIRONMENTAL AND EXPERIMENTAL BOTANY （ 影响因子：5.7； 五年影响因子：6.0 ）
ISSN： 0098-8472
年卷期： 2023 年 207 卷
页码：
收录情况： SCI
摘要： Drought is a major environmental factor limiting grapevine production and quality. However, the roles of miRNAs in different grape varieties at the post-transcriptional level during drought are largely unknown. In this study, we investigated the miRNA abundance in a drought-sensitive grapevine (Vitis vinifera L. cv. Cabernet Sauvignon) (CS) and a drought-tolerant grapevine (Berlandiari Ressiguier No.2 x Rupestris Martin) (110R) in response to drought using Illumina sequencing. A total of 488 known and 892 novel miRNAs belonging to 48 miRNA families were identified in CS and 110-R, respectively. Various accumulation trends of miRNAs observed in the differential drought tolerance of grapevine genotypes were further confirmed using stem-loop qRT-PCR. The target transcripts are predominantly associated with biological processes, cellular components, and mo-lecular functions. Several significantly different drought-responsive miRNAs were examined by beta-glucuronidase reporter gene activity driven by miRNA promoters in transgenic lines. The results showed drought-induced downregulation of VvmiR169d and VvmiR398a expression and upregulation of VvmiR156b expression. More-over, we noted that VvmiR156b overexpression significantly decreased primary root length and increased lateral root numbers in Arabidopsis lines and observed a higher relative growth rate in grape calli under drought treatment. Therefore, genotype-dependent stress-responsive regulation of miRNA expression contributes to the differential drought tolerance of grapevines, and this finding provides mechanistic insight into the vital roles of miRNAs in drought-stress environments in grapevines.
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