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Molecular characterization of carbendazim resistance of Fusarium species complex that causes sugarcane pokkah boeng disease

文献类型： 外文期刊

作者： Xu, Shiqiang 1 ; Wang, Jihua 1 ; Wang, Haixuan 1 ; Bao, Yixue 1 ; Li, Yisha 1 ; Govindaraju, Muralidharan 1 ; Yao, Wei 1 ;

作者机构： 1.Guangxi Univ, State Key Lab Conservat & Utilizat Subtrop Agr Bi, Nanning 530005, Peoples R China

2.Guangdong Acad Agr Sci, Crop Res Inst, Guangzhou 510640, Guangdong, Peoples R China

关键词： Pokkah boeng; Fusarium verticillioides; Fusarium proliferatum; Carbendazim-induced mutant; Gene expression profile

期刊名称：BMC GENOMICS （ 影响因子：3.969； 五年影响因子：4.478 ）

ISSN： 1471-2164

年卷期： 2019 年 20 卷

页码：

收录情况： SCI

摘要： BackgroundPokkah boeng is one of the most serious and devastating diseases of sugarcane and causes significant loss in cane yield and sugar content. Although carbendazim is widely used to prevent fungal diseases, the molecular basis of Fusarium species complex (FSC) resistance to carbendazim remains unknown.ResultsThe EC50 (fungicide concentration that inhibits 50% of mycelial growth) values of carbendazim for 35 FSC isolates collected in cane growing regions of China were ranged from 0.5097 to 0.6941gmL(-1) of active ingredient (a.i.), in an average of 0.5957g a.i. mL(-1). Among carbendazim-induced mutant strains, SJ51M (F. verticillioides) had a CTG rather than CAG codon (Q134L) at position 134 of the FVER_09254 gene, whereas in the mutant strain HC30M (F. proliferatum) codon ACA at position 351 of the FPRO_07779 gene was replaced by ATA (T351I). Gene expression profiling analysis was performed for SJ51M and its corresponding wild type strain SJ51, with and without carbendazim treatment. The gene expression patterns in SJ51 and SJ51M changed greatly as evidenced by the detection of 850 differentially expressed genes (DEGs). Functional categorization indicated that genes associated with oxidation-reduction process, ATP binding, integral component of membrane, transmembrane transport and response to stress showed the largest expression changes between SJ51M and SJ51. The expression levels of many genes involved in fungicide resistance, such as detoxification enzymes, drug efflux transporters and response to stress, were up-regulated in SJ51M compared to SJ51 with and without carbendazim treatment.ConclusionFSC was sensitive to carbendazim and had the potential for rapid development of carbendazim resistance. The transcriptome data provided insight into the molecular pathways involved in FSC carbendazim resistance.

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