首页|菜心NAC转录因子BcNST1和BcSND1的鉴定及基本特征分析

菜心NAC转录因子BcNST1和BcSND1的鉴定及基本特征分析

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NAC家族转录因子NST1(NAC SECONDARY WALL THICKENING PROMOTING FACTOR 1)和SND1(SECONDARY WALL-ASSOCIATED NAC DOMAIN 1)在调控植物次生细胞壁发育和木质素合成方面发挥着重要作用，然而NST1和SND1在菜心木质化或者发育过程中的表达特性和功能尚不明确。本研究以拟南芥AtNST1和AtSND1蛋白的氨基酸序列为参考，从菜心中鉴定到了二者的同源物，分别命名为BcNST1和BcSND1。生物信息学分析显示，BcNST1和BcSND1分别与AtNST1和AtSND1具有较高的氨基酸序列一致性和相似性，并且它们的亲缘关系较近。BcNST1和BcSND1蛋白均定于细胞核中，同时还具备转录激活活性。基因表达模式分析发现BcNST1和BcSND1基因在菜心角果中的表达水平最高，其次是薹茎，并且二者在薹茎中的表达水平随着束间纤维细胞次生细胞壁的发育而增高。上述的研究结果为进一步探究BcNST1和BcSND1调控菜心木质化的分子机理提供了前期研究基础。
Identification and characterization analysis of NAC transcription factors BcNST1 and BcSND1 in Chinese flowering cabbage
The NAC transcriptional regulators NST1(SECONDARY WALL THICKENING PROMOTING FAC-TOR 1)and SND1(SECONDARY WALL-ASSOCIATED NAC DOMAIN 1),play pivotal roles in directing sec-ondary cell wall and lignin biosynthesis.However,the expression characteristics and functions of NST1 and SND1 during lignification or development in Chinese flowering cabbage(Brassica campestris ssp.chinensis var.utilis)are not yet clear.This article revealed two Arabidopsis NST orthologs identified in Chi-nese flowering cabbage,designated as BcNST1 and BcSND1.Bioinformatics analysis showed that BcNST1 and BcSND1 had high amino acid sequence consistency and similarity with AtNST1 and AtSND1,respectively,and their genetic relationships were relatively close.Remarkably,both BcNST1 and BcSND1 proteins demonstrated transcriptional activation functions and are predominantly localized in the nucleus.It was evident that stems and fruit tissues of Chinese flowering cabbage express BcNST1 and BcSND1 at elevated levels compared to root,leaf and flower tissues.Interestingly,the transcript abundance of BcNST1 and BcSND1 steadily magnified during interfascicular fibroblast's secondary cell wall maturation stages.The above results provide a preliminary research basis for further exploring the molecular mecha-nism of BcNST1 and BcSND1 regulating lignification in Chinese flowering cabbage.

Chinese flowering cabbage(Brassica campestris ssp.chinensis var.utilis)NST1SND1sec-ondary cell walllignin

雷世康、李光光、江定、袁凡崇、郑岩松、张华、曹必好

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华南农业大学园艺学院,农业农村部华南地区园艺作物生物学与种质创制重点实验室,广州 510642

广州市农业科学研究院,广州 510335

菜心 NST1 SND1 次生细胞壁 木质素

广东省种业振兴项目广东省科技项目广州市科技项目广州市科技项目广州市农业支农资金项目农业农村部华南地区园艺作物生物学与种质创制重点实验室开放经费资助课题

2022-NJS-03-0012022B02020800012022060101732023B0-3J1270穗财编[2023]1号23001

2024

10.13592/j.cnki.ppj.100853

植物生理学报
中国植物生理学会，中国科学院上海生命科学研究院植物生理生态研究所

植物生理学报

CSTPCD北大核心
影响因子：1.532
ISSN：2095-1108
年,卷(期)：2024.60(6)
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