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2025 ; 13
(7
): e70396
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White Light Orchestrates Mycoparasitic and Infection Activities by Regulating
Expression of Effectors in Trichothecium roseum
#MMPMID40585502
Zhu M
; Zhang F
; Qiu Z
; Zhao S
; Gao S
Food Sci Nutr
2025[Jul]; 13
(7
): e70396
PMID40585502
show ga
The fungal developmental processes are orchestrated by white light. Despite the
genome assembly of Trichothecium roseum being available, the underlying molecular
mechanisms of the white light-mediated developments of T.?roseum remain obscure.
It was found that white light impaired mycoparasitic activities against the wheat
powdery mildew fungus and infection processes on tomato fruits in T.?roseum.
In vitro and in vivo, white light significantly impaired colony expansion and
dramatically increased conidiation of T.?roseum. RNA-seq analysis of T.?roseum
conidia was profiled to illustrate the light-mediated expression of genes. A
total of 153 and 666 differentially expressed genes were identified between
conidia treated with or without white light at 48- and 96-h post inoculation
(hpi). Among genome-wide identified effectors, 8 and 36 effectors were
differentially regulated by white light at 48 and 96?hpi, respectively. The core
effectors, Tro004101, Tro006854, Tro008316, and Tro004104 were commonly
downregulated by white light. Notably, white light regulated gene expression in
key metabolic pathways including tryptophan metabolism (3 genes) and tyrosine
metabolism (5 genes), as well as the HOG-MAPK signaling cascade. These results
demonstrated that white light-compromised T.?roseum mycoparasitic and infection
activities might be achieved by regulating specific effector expression and
differentially modulating metabolism and HOG-MAPK pathways. The genes detected by
our transcriptome analysis may be crucial for mycoparasitism and infection by
T.?roseum and thus serve as targets for future functional analysis. Our findings
provide new insights into the white light-orchestrated developments of an
important agricultural and economical fungus and will potentially support efforts
for the study of fungal effectors.
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