文献类型： 外文期刊

作者： Liu, Ning ¹ ; Chen, Yue ³ ; Liu, Jing ³ ; Su, Qianfu ⁴ ; Zhao, Bin ¹ ; Sun, Manli ¹ ; Jia, Hui ¹ ; Cao, Zhiyan ¹ ; Dong, Jingao ¹ ;

作者机构： 1.State Key Lab North China Crop Improvement & Regul, Baoding, Peoples R China

2.Hebei Key Lab Plant Physiol & Mol Pathol, Baoding, Peoples R China

3.Hebei Agr Univ, Plant Pathogen Mycotoxin & Mol Plant Pathol Lab, Baoding, Peoples R China

4.Jilin Acad Agr Sci, Changchun, Peoples R China

关键词： Fusarium verticillioides; Fusarium graminearum; optimum temperature; transcriptome analysis; thermal ecological niches

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：6.064； 五年影响因子：6.843 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Fusarium verticillioides and Fusarium graminearum are important pathogens causing disease in maize (Zea mays) worldwide. The distributions of these fungal pathogens vary greatly in different regions and in different years, and are influenced by environmental and climatic conditions. Temperature has significant effects on the growth and mycotoxin production of Fusarium species. In this study, the effects of temperature on the growth and pathogenicity of F. verticillioides and F. graminearum were investigated. F. verticillioides grew fastest and exhibited the strongest pathogenicity to maize stems and grains at 30 degrees C, while F. graminearum grew best at 20 degrees C. Both species produced more toxins at 20 degrees C than at 30 degrees C. To explain the interspecific differences in the relationship of growth and temperature, RNA-seq was used to compare F. verticillioides and F. graminearum cultivated for 4 d at the optimum temperatures of 30 degrees C and 20 degrees C, respectively. Samples of F. verticillioides were also cultivated for 9 d (to maximize toxin production) at 20 degrees C and 30 degrees C and analyzed by RNA-seq to investigate the influence of temperature for different growth stages. The differently expressed genes (DEGs) were identified by comparison of cultures grown for the same amount of time but at different temperatures. GO enrichment analysis showed high enrichment of DEGs in categories of membrane part, catalytic activity, metabolic process, and growth at warmer temperature resulted in more down-regulated DEGs enriched in membrane components in all groups. KEGG analysis revealed enrichment of DEGs related to different temperatures in carbohydrate and amino acid metabolism pathways. For both species, there was decreased expression of many DEGs related to amino acid metabolism when cultivated at warm temperature, such as genes related to beta-alanine metabolism and arginine and proline metabolism. However, changes in genes related to glyoxylate and dicarboxylate metabolism and fatty acid degradation were more related to the growth state. The results showing different responses pattern of these pathways provides a foundation for further investigation of the molecular mechanisms underlying distinct thermal ecological niches of F. verticillioides and F. graminearum.