数字农科院2.0

Genome-wide identification, classification, and expression profiling of LAC gene family in sesame

文献类型： 外文期刊

作者： Jianglong Zhou;Fengduo Hu;Muez Berhe;Rong Zhou;Donghua Li;Huan Li;Li Yang;Ting Zhou;Yanxin Zhang;Linhai Wang;Jun You

作者机构：

关键词： Abiotic stress;Gene expression;LAC gene family;Sesamum indicum

期刊名称： BMC Plant Biology

ISSN： 1471-2229

年卷期： 2025 年 24 卷 1 期

页码：

收录情况： SCIE（2024版）

摘要： Background: Laccases (LACs) are vital plant growth and development enzymes, participating in lignin biopolymerization and responding to stress. However, the role of LAC genes in plant development as well as stress tolerance, is still not well understood, particularly in sesame (Sesamum indicum L.), an important oilseed crop. Results: In this study, 51 sesame LAC genes (SiLACs) were identified, which were unevenly distributed across different chromosomes. The phylogeny of Arabidopsis LAC (AtLACs) subdivided the SiLAC proteins into seven subgroups (Groups I-VII), of which Group VII contained only sesame LACs. Within the same subgroup, SiLACs exhibit comparable structures and conserved motifs. The promoter region of SiLACs harbors various cis-acting elements that are related to plant growth, phytohormones, and stress responses. Most SiLACs were expressed in the roots and stems, whereas some were expressed specifically in flowers or seeds. RNA-seq analysis revealed that 19 SiLACs exhibited down-regulation and three showed up-regulation in response to drought stress, while 15 SiLACs were down-regulated and four up-regulated under salt stress. Additionally, qRT-PCR analysis showcased that certain SiLAC expression was significantly upregulated as a result of osmotic and salt stress. SiLAC5 and SiLAC17 exhibited the most significant changes in expression under osmotic and salt stresses, indicating that they may serve as potential targets for improving sesame resistance to various stresses. Conclusions: Our study offers a thorough comprehension of LAC gene structure, classification, evolution, and abiotic stress response in sesame plants. Furthermore, we provide indispensable genetic resources for sesame functional characterization to enhance its tolerance to various abiotic stresses.

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