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基因表达相关性分析揭示了棉花色素腺发育过程中 MYC-NAC 调控网络。

Gene Expression Correlation Analysis Reveals MYC-NAC Regulatory Network in Cotton Pigment Gland Development.

机构信息

State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, China.

Plant Genetics, Gembloux Agro Bio-Tech, University of Liège, 5030 Gembloux, Belgium.

出版信息

Int J Mol Sci. 2021 May 8;22(9):5007. doi: 10.3390/ijms22095007.

DOI:10.3390/ijms22095007
PMID:34066899
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8125883/
Abstract

Plant NAC (NAM, ATAF1/2, and CUC2) family is involved in various development processes including Programmed Cell Death (PCD) associated development. However, the relationship between NAC family and PCD-associated cotton pigment gland development is largely unknown. In this study, we identified 150, 153 and 299 genes in newly updated genome sequences of , and , respectively. All genes were divided into 8 groups by the phylogenetic analysis and most of them were conserved during cotton evolution. Using the vital regulator of gland formation as bait, expression correlation analysis screened out 6 genes which were low-expressed in glandless cotton and high-expressed in glanded cotton. These 6 genes acted downstream of and were induced by MeJA. Silencing , another MYC-coding gene, caused almost glandless phenotype and down-regulated expression of and the genes, indicating a MYC-NAC regulatory network in gland development. In addition, predicted regulatory mechanism showed that the   genes were possibly regulated by light, various phytohormones and transcription factors as well as miRNAs. The interaction network and DNA binding sites of the 6 NAC transcription factors were also predicted. These results laid the foundation for further study of gland-related genes and gland development regulatory network.

摘要

植物 NAC（NAM、ATAF1/2 和 CUC2）家族参与包括与程序性细胞死亡（PCD）相关的发育在内的各种发育过程。然而，NAC 家族与 PCD 相关的棉花色素腺发育之间的关系在很大程度上是未知的。在这项研究中，我们分别在更新的 、 和 的基因组序列中鉴定出 150、153 和 299 个基因。通过系统发生分析将所有基因分为 8 组，并且它们在棉花进化过程中大部分都是保守的。使用腺形成的关键调节剂 作为诱饵，通过表达相关性分析筛选出 6 个在无腺棉中低表达而在有腺棉中高表达的基因。这 6 个基因作用于 下游，并且受 MeJA 诱导。沉默另一个 MYC 编码基因 ，导致几乎无腺表型，并下调 和 基因的表达，表明在腺发育中存在 MYC-NAC 调控网络。此外，预测的调控机制表明， 基因可能受光、各种植物激素和转录因子以及 miRNA 调控。还预测了 6 个 NAC 转录因子的互作网络和 DNA 结合位点。这些结果为进一步研究与腺相关的基因和腺发育调控网络奠定了基础。

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