The NAC transcription factor LuNAC61 negatively regulates fiber development in flax ( Linum usitatissimum L.)
文献类型： 外文期刊
作者： Xie, Dongwei 1 ; Li, Jing 1 ; Li, Wan 2 ; Sun, Lijun 1 ; Dai, Zhigang 3 ; Zhou, Wenzhi 4 ; Su, Jianguang 3 ; Sun, Jian 1 ;
作者机构： 1.Nantong Univ, Sch Life Sci, Nantong 226019, Peoples R China
2.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Tillage, Harbin 150086, Peoples R China
3.Chinese Acad Agr Sci, Inst Bast Fiber Crops, Changsha 410221, Peoples R China
4.Jiangsu Sanshu Biotechnol Co Ltd, Nantong 226001, Peoples R China
关键词： flax; fiber development; LuNAC61; gene function; gene interaction
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.8； 五年影响因子：4.8 ）
ISSN： 2095-3119
年卷期： 2024 年 23 卷 3 期
页码：
收录情况： SCI
摘要： Flax is a crucial fiber crop that exhibits excellent textile properties and serves as a model plant for investigating phloem fiber development. The regulation of multiple genes significantly influences fiber development, notably involving NAC (NAM, ATAF1/ 2, CUC2) transcription factors in forming the fiber secondary cell wall (SCW). Overexpression of LuNAC61 in flax resulted in sparse top meristematic zone leaves and significantly reduced stem cellulose content. Scanning electron microscopy and staining observations revealed a significant reduction in fiber bundles. beta-Glucuronidase (GUS) staining analysis demonstrated high activity of the LuNAC61 promoter in the bast fibers of the flax stem. Additionally, several members of the LuPLATZ and LuCesA families exhibited significant coexpression with LuNAC61. Subcellular localization indicated the presence of LuPLATZ24 protein in the nucleus and cytoplasm, LuNAC61 protein exclusively in the nucleus, and LuCesA10 in the nucleus and endoplasmic reticulum. LuPLATZ24 positively regulates LuNAC61, whereas LuNAC61 negatively affects LuCesA10, suggesting the involvement of a metabolic network in regulating flax fiber development. In conclusion, this study provides a critical opportunity for a comprehensive and in-depth analysis of the mechanisms governing flax fiber development and the potential use of biotechnology to enhance flax fiber yield.
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