数字农科院2.0

Genome-Wide Identification Of The Lac G.ene Family And Its E xpression Analysis Under Stress In Brassica Napus

文献类型： 外文期刊

作者： Li, Yangyang;Li, Jiana;Lin, Na;Xu, Xinfu;Lu, Kun;Liu, Liezhao;Ping, Xiaoke;Wang, Tengyue;Wang, Hao;Jian, Hongju;Di, Feifei

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关键词： laccase; Brassica napus; lignification; stress

期刊名称： MOLECULES

ISSN： 1420-3049

年卷期： 2019 年 24 卷 10 期

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摘要： Lignin is an important biological polymer in plants that is necessary for plant secondary cell wall ontogenesis. The laccase (LAC) gene family catalyzes lignification and has been suggested to play a vital role in the plant kingdom. In this study, we identified 45 LAC genes from the Brassica napus genome (BnLACs), 25 LAC genes from the Brassica rapa genome (BrLACs) and 8 LAC genes from the Brassica oleracea genome (BoLACs). These LAC genes could be divided into five groups in a cladogram and members in same group had similar structures and conserved motifs. All BnLACs contained hormone- and stress- related elements determined by cis-element analysis. The expression of BnLACs was relatively higher in the root, seed coat and stem than in other tissues. Furthermore, BnLAC4 and its predicted downstream genes showed earlier expression in the silique pericarps of short silique lines than long silique lines. Three miRNAs (miR397a, miR397b and miR6034) target 11 BnLACs were also predicted. The expression changes of BnLACs under series of stresses were further investigated by RNA sequencing (RNA-seq) and quantitative real-time polymerase chain reaction (qRT-PCR). The study will give a deeper understanding of the LAC gene family evolution and functions in B. napus.

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