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MicroRNA164 Affects Plant Responses to UV Radiation in Perennial Ryegrass

文献类型： 外文期刊

作者： Xu, Chang 1 ; Huang, Xin 1 ; Ma, Ning 1 ; Liu, Yanrong 1 ; Xu, Aijiao 1 ; Zhang, Xunzhong 2 ; Li, Dayong 3 ; Li, Yue 1 ; Zhang, Wanjun 1 ; Wang, Kehua 1 ;

作者机构： 1.China Agr Univ, Coll Grassland Sci & Technol, Beijing 100193, Peoples R China

2.Virginia Polytech Inst & State Univ, Sch Plant & Environm Sci, Blacksburg, VA 24061 USA

3.Beijing Acad Agr & Forestry Sci, Beijing 100097, Peoples R China

关键词： UV-B radiation; total phenols; total anthocyanins; antioxidants

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 9 期

页码：

收录情况： SCI

摘要： Increasing the ultraviolet radiation (UV) level, particularly UV-B due to damage to the stratospheric ozone layer by human activities, has huge negative effects on plant and animal metabolism. As a widely grown cool-season forage grass and turfgrass in the world, perennial ryegrass (Lolium perenne) is UV-B-sensitive. To study the effects of miR164, a highly conserved microRNA in plants, on perennial ryegrass under UV stress, both OsmiR164a overexpression (OE164) and target mimicry (MIM164) transgenic perennial ryegrass plants were generated using agrobacterium-mediated transformation, and UV-B treatment (similar to 600 mu w cm(-2)) of 7 days was imposed. Morphological and physiological analysis showed that the miR164 gene affected perennial ryegrass UV tolerance negatively, demonstrated by the more scorching leaves, higher leaf electrolyte leakage, and lower relative water content in OE164 than the WT and MIM164 plants after UV stress. The increased UV sensitivity could be partially due to the reduction in antioxidative capacity and the accumulation of anthocyanins. This study indicated the potential of targeting miR164 and/or its targeted genes for the genetic manipulation of UV responses in forage grasses/turfgrasses; further research to reveal the molecular mechanism underlying how miR164 affects plant UV responses is needed.

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