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miR390 family of Cymbidium goeringii is involved in the development of reproductive organs in transgenic Arabidopsis

文献类型： 外文期刊

作者： Xu, Zihan 1 ; Liu, Qian 1 ; Chen, Yue 2 ; He, Yuanhao 1 ; Hu, Fengrong 1 ;

作者机构： 1.Nanjing Forestry Univ, Coll Landscape Architecture, Nanjing 210037, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Hort, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Cymbidium goeringii; miR390; Reproductive organ; Flower development; Arabidopsis

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background miR390s is an ancient family with a high level of conservation among plant miRNAs. Through the auxin signal transduction pathway, miR390 participates in diverse biological processes of plant growth and development. As an important Chinese traditional orchid, Cymbidium goeringii has unique flower shape and elegant fragrance. But its development has been greatly restricted because of the low flower bud differentiation and the difficult reproduction. This study aims to provide guidance for the role of cgo-miR390 in reproductive organ development to enhance the ornamental and economic value of Cymbidium. Results MIR390a, MIR390b and MIR390c of C. goeringii were cloned, and their length ranged from 130 to 150 nt. Each precursor sequence of cgo-miR390 contains 2 to 3 mature miRNAs. Three kinds of cgo-miR390s displayed distinct temporal and spatial expression patterns during floral development in C. goeringii. The overexpression of MIR390s alters morphology and function of stamens and pistils in Arabidopsis, such as enlargement of anther aspect ratio and separation of stylar and stigmas, which affects the development of fruits and seeds. In particular, the pollen amount decreased and the seed abortion rate increased in cgo-MIR390c-overexpressed plants. Conclusions cgo-miR390 family affected the development of reproductive organs in transgenic Arabidopsis. The study provides references for the genetic improvement for orchid with potentially great economic benefit.

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