Exploration of ABA Responsive miRNAs Reveals a New Hormone Signaling Crosstalk Pathway Regulating Root Growth of Populus euphratica.
Exploration of ABA Responsive miRNAs Reveals a New Hormone Signaling Crosstalk Pathway Regulating Root Growth of Populus euphratica.
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ABA 响应 miRNA 的探索揭示了调节胡杨根系生长的新激素信号串扰途径
DOI：
10.3390/ijms19051481
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发表时间：
2018-05-16
影响因子：
5.6
通讯作者：
Xia X
中科院分区：
文献类型：
--
作者：
Lian C;Yao K;Duan H;Li Q;Liu C;Yin W;Xia X
脱落酸（ABA）在植物适应、种子发芽和根系发育的调节中发挥着重要作用。然而，ABA 调节根发育的机制仍然知之甚少，特别是通过 miRNA 介导的途径。在这里，小RNA (sRNA)-seq和degradome-seq被用来分析胡杨茎和根中miRNA对ABA的响应，胡杨是一种非生物胁迫抗性研究的模型树种。总共鉴定了255个独特的成熟序列，包含154个已知的miRNA和101个新的miRNA，其中33个miRNA和54个miRNA分别对根和茎中的ABA有反应。此外，对这些 miRNA 及其靶标的分析揭示了 ABA 通过 miRNA 介导的途径调节根生长的新激素信号串扰模型，例如 peu-miR-n68 介导 ABA 和油菜素类固醇 (BR) 信号通路之间的串扰，以及 peu-miR477b 介导 ABA 和赤霉酸 (GA) 信号传导之间的串扰。总而言之，我们对 miRNA 的全基因组分析为 ABA 调节杨树根生长的机制提供了新的见解。
Abscisic acid (ABA) plays an important role in the regulation of plant adaptation, seed germination, and root development in plants. However, the mechanism of ABA regulation of root development is still poorly understood, especially through the miRNA-mediated pathway. Here, small RNA (sRNA)-seq and degradome-seq were used to analyze the miRNAs’ responsive to ABA in the stems and roots of P. euphratica, a model tree species for abiotic stress-resistance research. In total, 255 unique mature sequences, containing 154 known miRNAs and 101 novel miRNAs were identified, among which 33 miRNAs and 54 miRNAs were responsive to ABA in the roots and stems, respectively. Furthermore, the analysis of these miRNAs and their targets revealed a new hormone signaling crosstalk model of ABA regulation of root growth through miRNA-mediated pathways, such as peu-miR-n68 mediation of the crosstalk between ABA and the brassinosteroid (BR) signaling pathway and peu-miR477b mediation of the crosstalk between ABA and Gibberellic acid (GA) signaling. Taken together, our genome-wide analysis of the miRNAs provides a new insight into the mechanism of ABA regulation of root growth in Populus.
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