生物
多年生植物
非生物胁迫
非生物成分
拟南芥
剪股颖
适应(眼睛)
植物
细胞生物学
农学
生态学
禾本科
基因
生物化学
神经科学
突变体
作者
Xiaotong Chen,Zhaohui Chen,Andrew Fiorentino,Morgan Kuess,Nishanth Tharayil,Rohit Kumar,Elizabeth Leonard,Rooksana E. Noorai,Qian Hu,Hong Luo
摘要
Summary MicroRNA169 (miR169) has been implicated in multi‐stress regulation in annual species such as Arabidopsis, maize and rice. However, there is a lack of experimental functional and mechanistic studies of miR169 in plants, especially in perennial species, and its impact on plant growth and development remains unexplored. Creeping bentgrass ( Agrostis stolonifera L.) is a C3 cool‐season perennial turfgrass of significant environmental and economic importance. In this study, we generated both miR169 overexpression and knockdown transgenic creeping bentgrass lines. We found that miR169 acts as a positive regulator in abiotic stress responses but is negatively associated with plant growth and development, playing multiple critical roles in the growth and environmental adaptation of creeping bentgrass. These roles include differentiated spatial hormone accumulation patterns associated with growth and stress accommodation, elevated antioxidant activity that alleviates oxidative damage induced by stress, ion‐channelling membrane components for maintaining homeostasis under saline conditions, and potential cross‐talks with stress‐regulating transcription factors such as AsHsfA and AsWRKYs . Our results unravel the role of miR169 in modulating plant development and stress responses in perennial grass species. This underlines the potential of manipulating miR169 to generate crop cultivars with desirable traits to meet diverse agricultural demands.
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