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一种来自棉花的新型NAC转录因子EgNAC141正向调控木质素生物合成并增加木质素沉积。

A Novel NAC Transcription Factor From , EgNAC141, Positively Regulates Lignin Biosynthesis and Increases Lignin Deposition.

作者信息

Sun YiMing, Jiang Chunxue, Jiang Ruiqi, Wang Fengying, Zhang Zhenguo, Zeng Jianjun

机构信息

School of Life Sciences, Southwest University, Chongqing, China.

Chongqing Three Gorges University College of Public Administration, Chongqing, China.

出版信息

Front Plant Sci. 2021 Apr 8;12:642090. doi: 10.3389/fpls.2021.642090. eCollection 2021.

DOI:10.3389/fpls.2021.642090
PMID:33897732
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8061705/
Abstract

Wood formation is a complicated process under the control of a large set of transcription factors. NAC transcription factors are considered "master switches" in this process. However, few NAC members have been cloned and characterized in , which is one of the most economically important woody plants. Here, we reported an NAC transcription factor from , EgNAC141, which has no Arabidopsis orthologs associated with xylogenesis-related processes. was predominantly expressed in lignin-rich tissues, such as the stem and xylem. Overexpression of in Arabidopsis resulted in stronger lignification, larger xylem, and higher lignin content. The expression of lignin biosynthetic genes in transgenic plants was significantly higher compared with wild-type plants. The transient expression of activated the expression of Arabidopsis lignin biosynthetic genes in a dual-luciferase assay. Overall, these results showed that EgNAC141 is a positive regulator of lignin biosynthesis and may help us understand the regulatory mechanism of wood formation.

摘要

木材形成是一个受大量转录因子控制的复杂过程。NAC转录因子被认为是这个过程中的“主开关”。然而，在杨树（一种经济上最重要的木本植物之一）中，很少有NAC成员被克隆和鉴定。在这里，我们报道了一个来自杨树的NAC转录因子EgNAC141，它在拟南芥中没有与木质部形成相关过程的直系同源物。EgNAC141主要在富含木质素的组织中表达，如茎和木质部。在拟南芥中过表达EgNAC141导致更强的木质化、更大的木质部和更高的木质素含量。与野生型植物相比，转基因植物中木质素生物合成基因的表达显著更高。在双荧光素酶测定中，EgNAC141的瞬时表达激活了拟南芥木质素生物合成基因的表达。总体而言，这些结果表明EgNAC141是木质素生物合成的正调控因子，可能有助于我们理解木材形成的调控机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/9c1b0ba37e5c/fpls-12-642090-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/6b72ece0e851/fpls-12-642090-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/a44cdc56dd9e/fpls-12-642090-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/ea50c71accdc/fpls-12-642090-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/b9323d7e957a/fpls-12-642090-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/b6c054bd7f52/fpls-12-642090-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/9c1b0ba37e5c/fpls-12-642090-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/6b72ece0e851/fpls-12-642090-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/a44cdc56dd9e/fpls-12-642090-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/ea50c71accdc/fpls-12-642090-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/b9323d7e957a/fpls-12-642090-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/b6c054bd7f52/fpls-12-642090-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06cd/8061705/9c1b0ba37e5c/fpls-12-642090-g006.jpg

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