文献类型： 外文期刊

作者： Cui, Xiao ¹ ; Wei, Yi ¹ ; Xie, Xiang-Li ¹ ; Chen, Li-Na ¹ ; Zhang, Shi-Hong ¹ ;

作者机构： 1.Jilin Univ, Coll Plant Sci, Changchun 130062, Peoples R China

2.Henan Acad Agr Sci, Zhengzhou 310058, Peoples R China

关键词： T. lanuginosus;Mitochondrial and peroxisomal Lons;Growth and development;Stress resistance;Longevity

期刊名称：FUNGAL GENETICS AND BIOLOGY （ 影响因子：3.495； 五年影响因子：3.831 ）

ISSN： 1087-1845

年卷期： 2017 年 103 卷

页码：

收录情况： SCI

摘要： The ATP-dependent Lon enzyme is a highly conserved protease with multiple roles in diverse species such as fungi; however, there are few reports on Lon enzymes in filamentous fungi. Thermomyces lanuginosus, a typical thermophilic fungus, has been widely studied in physiology and cell biology; thus, studies on Thermomyces Lons are important. Two Lons were bioinformatically deduced in T. lanuginosus. Subcellular localization analysis showed that one is present in mitochondria (MLon), while the other is found in peroxisomes (PLon). Although both Lon enzymes were activated by H2O2, they were not induced by heat shock; instead, they were induced by low temperatures. Two single-deletion Lon mutants (AMLon and APLon) were generated. Biological analysis demonstrated that AMLon decreased the production of conidia but increased the growth of mycelia. By contrast, APLon increased the production of conidia but decreased the growth of mycelia. The lifespan was measured in time and in length of continuous growth. The wild-type strain showed continuous linear growth for 60 days, whereas growth was impeded at 30 and 50 days for APLon and AMLon mutants, respectively, suggesting that PLon is more important for longevity than MLon. Interestingly, APLon, which accumulated larger amount of H2O2 was not only more sensitive to exogenous H2O2 but also much more sensitive to other selected stressors. Taken together, our data indicate that mitochondrial and peroxisomal Lons play opposite roles in controlling growth and development, but exhibit synergistic effects on the normal states of vegetative growth, asexual development, stress resistance and longevity in T. lanuginosus.