MfOfd1 is crucial for stress responses and virulence in the peach brown rot fungus Monilinia fructicola

MfOfd1 is crucial for stress responses and virulence in the peach brown rot fungus Monilinia fructicola
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MfOfd1 对于桃褐腐真菌 Monilinia fructicola 的应激反应和毒力至关重要

DOI:
10.1111/mpp.12933
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发表时间:
2020-04
影响因子:
4.9
通讯作者:
Luo Chao-Xi
Luo Chao-Xi
中科院分区:
农林科学1区
文献类型:
--
作者:
Zhang Ming-Ming;Wang Zuo-Qian;Xu Xiao;Huang Song;Yin Wei-Xiao;Luo Chao-Xi

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桃褐腐病菌(Monilinia fructicola)是蔷薇科真菌中分布最广的一种,可引起蔷薇科果实的开花枯萎病、枝腐病和果腐病。迄今为止,对该菌基因组学和致病性的研究还很有限。果生菌在这项研究中,我们确定了一个氧化还原相关的基因,MfOfd 1,这是显着上调后1小时接种M。桃果实上的果霉。我们使用成簇调控间隔短回文重复序列(CRISPR)/Cas9系统结合同源重组来确定MfOfd 1基因的功能。结果表明,敲除转化子的产孢量减少了53%~ 83%。敲低转化体表现出增加的敏感性H2 O2和降低的毒力桃果实相比,野生型分离Bmpc 7。结果表明,H_2O_2能刺激野生型菌株中MfOfd 1的表达。转化体也更敏感的外源性渗透胁迫,如甘油,d-山梨醇,和NaCl,和二甲酰亚胺类杀菌剂(异菌脲和菌核净)。这些结果表明MfOfd 1基因在M.在产孢、氧化反应、渗透胁迫耐受性和毒力方面的研究。
Monilinia fructicola is the most widely distributed species among the Monilinia genus in the world, and causes blossom blight, twig canker, and fruit rot on Rosaceae fruits. To date, studies on genomics and pathogenicity are limited in M. fructicola. In this study, we identified a redox-related gene, MfOfd1, which was significantly up-regulated at 1 hr after inoculation of M. fructicola on peach fruits. We used the clustered regulatory inter-spaced short palindromic repeats (CRISPR)/Cas9 system combined with homologous recombination to determine the function of the MfOfd1 gene. The results showed that the sporulation of knockdown transformants was reduced by 53% to 83%. The knockdown transformants showed increased sensitivity to H2O2 and decreased virulence on peach fruits compared to the wild-type isolate Bmpc7. It was found that H2O2 could stimulate the expression of MfOfd1 in the wild-type isolate. The transformants were also more sensitive to exogenous osmotic stress, such as glycerol, d-sorbitol, and NaCl, and to dicarboximide fungicides (iprodione and dimethachlon). These results indicate that the MfOfd1 gene plays an important role in M. fructicola in sporulation, oxidative response, osmotic stress tolerance, and virulence.
DOI: 10.1094/pdis-94-5-0643b
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影响因子: 4.5
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