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The StLAC2 gene is required for cell wall integrity, DHN-melanin synthesis and the pathogenicity of Setosphaeria turcica

文献类型： 外文期刊

作者： Ma, Shuangxin 1 ; Cao, Keke 1 ; Liu, Ning 1 ; Meng, Chuan; Cao, Zhiyan 1 ; Dai, Dongqing 1 ; Jia, Hui 1 ; Zang, Jinpin 1 ;

作者机构： 1.Hebei Agr Univ, Key Lab Hebei Prov Mol Plant Microbe Interact, Baoding 071000, Hebei, Peoples R China

2.Hebei Agr Univ, Key Lab Hebei Prov Mol Plant Microbe Interact, Baoding 071000, Hebei, Peoples R C

关键词： Gene function;Laccase;Fungal development;Infection

期刊名称：FUNGAL BIOLOGY （ 影响因子：3.099； 五年影响因子：3.364 ）

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收录情况： SCI

摘要： Laccases are blue multicopper oxidases, play important roles in various biological processes. These processes include fungal dihydroxynaphthalene (DHN)-melanin biosynthesis and pathogenicity, cellular growth, morphogenesis, and differentiation. This study investigated functions of the laccase gene StLAC2 in Setosphaeria turcica. The Delta lac2 mutant colony color was distinct from that of the S. turcica wild-type (WT) isolate, and the mutants exhibited defective conidial formation. In contrast to the WT, the mutants exhibited a lighter color on the 2, 2-azino-di-[3-ethylbenzo-thia-zolin-sulphonate] (ABTS) plates, and the intracellular laccase activity was lower. Notably, StLAC2 gene loss correlated with decreased DHN-melanin biosynthesis and affected the integrity of the cell wall, where the StLAC2 gene mutants showed thinner, more transparent walls with a higher number of mitochondria than the WT. The Delta lac2 mutants also lost their pathogenicity in maize. The results indicated that the StLAC2 gene involved in cell wall integrity, melanin biosynthesis and appressorial and conidial formation. (C) 2017 British Mycological Society. Published by Elsevier Ltd. All rights reserved.

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