A Single Nucleotide Mutation in Adenylate Cyclase Affects Vegetative Growth, Sclerotial Formation and Virulence of Botrytis cinerea.

Abstract:

:Botrytis cinerea is a pathogenic fungus that causes gray mold disease in a broad range of crops. The high intraspecific variability of B. cinerea makes control of this fungus very difficult. Here, we isolated a variant B05.10M strain from wild-type B05.10. The B05.10M strain showed serious defects in mycelial growth, spore and sclerotia production, and virulence. Using whole-genome resequencing and site-directed mutagenesis, a single nucleotide mutation in the adenylate cyclase (BAC) gene that results in an amino acid residue (from serine to proline, S1407P) was shown to be the cause of various defects in the B05.10M strain. When we further investigated the effect of S1407 on BAC function, the S1407P mutation in bac showed decreased accumulation of intracellular cyclic AMP (cAMP), and the growth defect could be partially restored by exogenous cAMP, indicating that the S1407P mutation reduced the enzyme activity of BAC. Moreover, the S1407P mutation exhibited decreased spore germination rate and infection cushion formation, and increased sensitivity to cell wall stress, which closely related to fungal development and virulence. Taken together, our study indicates that the S1407 site of bac plays an important role in vegetative growth, sclerotial formation, conidiation and virulence in B. cinerea.

journal_name

Int J Mol Sci

authors

Chen X,Zhang X,Zhu P,Wang Y,Na Y,Guo H,Cai Y,Nie H,Jiang Y,Xu L

doi

10.3390/ijms21082912

subject

Has Abstract

pub_date

2020-04-21 00:00:00

issue

8

issn

1422-0067

pii

ijms21082912

journal_volume

21

pub_type

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