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System analysis of microRNAs in the development and aluminium stress responses of the maize root system

文献类型： 外文期刊

作者： Kong, Xiangpei 1 ; Zhang, Maolin 1 ; Xu, Xiangbo 2 ; Li, Xiaoming 3 ; Li, Cuiling 1 ; Ding, Zhaojun 1 ;

作者机构： 1.Shandong Univ, Coll Life Sci, Key Lab Plant Cell Engn & Germplasm Innovat, Jinan 250100, Peoples R China

2.Shandong Acad Agr Sci, Natl Maize Improvement Sub Ctr, Natl Engn Lab Wheat & Maize, Jinan, Peoples R China

3.Shandong Agr Univ, Coll Plant Protect, Shandong Prov Key Lab Agr Microbiol, Tai An, Shandong, Peoples R China

关键词： Al stress;maize;miRNAs;root development

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：9.803； 五年影响因子：9.555 ）

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收录情况： SCI

摘要： MicroRNAs (miRNAs) are a class of regulatory small RNAs (sRNAs) that down-regulate target genes through mRNA cleavage or translational inhibition. miRNA is known to play an important role in the root development and environmental responses in both the Arabidopsis and rice. However, little information is available to form a complete view of miRNAs in the development of the maize root system and Al stress responses in maize. Four sRNA libraries were generated and sequenced from the early developmental stage of primary roots (PRY), the later developmental stage of maize primary roots (PRO), seminal roots (SR) and crown roots (CR). Through integrative analysis, we identified 278 miRNAs (246 conserved and 32 novel ones) and found that the expression patterns of miRNAs differed dramatically in different maize roots. The potential targets of the identified conserved and novel miRNAs were also predicted. In addition, our data showed that CR is more resistant to Al stress compared with PR and SR, and the differentially expressed miRNAs are likely to play significant roles in different roots in response to environmental stress such as Al stress. Here, we demonstrate that the expression patterns of miRNAs are highly diversified in different maize roots. The differentially expressed miRNAs are correlated with both the development and environmental responses in the maize root. This study not only improves our knowledge about the roles of miRNAs in maize root development but also reveals the potential role of miRNAs in the environmental responses of different maize roots.

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