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Genome-wide identification of the MCA gene family and its role in resistance to powdery mildew in wheat
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Genome-wide identification of the MCA gene family and its role in resistance to powdery mildew in wheat
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Journal Article
Genome-wide identification of the MCA gene family and its role in resistance to powdery mildew in wheat
2026
Overview
Background
Metacaspases (
MCA
s) play important roles in regulating plant growth and development, as well as programmed cell death under stress conditions.
Results
Based on whole-genome information, a total of 36, 10, 12, 23, 11, nine, nine, six, eight, and five
MCA
genes were identified in
Triticum aestivum
,
Hordeum vulgare
,
Triticum urartu
,
Triticum dicoccoides
,
Aegilops tauschii
,
Oryza sativa
,
Arabidopsis thaliana
,
Vitis vinifera
,
Solanum lycopersicum
, and
Cucumis sativus
, respectively. The gene structures, evolutionary relationships, and potential roles of
TaMCAs
in wheat powdery mildew resistance were systematically analyzed. Phylogenetic analysis classified MCAs into four subgroups (Class I-1, I-2, II-1, and II-2), with members within the same subgroup exhibiting highly similar gene structures. Notably, two pairs of tandemly duplicated genes (
TaMCA1A-2
/
TaMCA1A-3
and
TaMCA1B-2
/
TaMCA1B-3
) were identified in wheat. Virus-induced gene silencing and qRT-PCR demonstrated that
TaMCA4D-3
, as a Class I-2 gene, positively regulates resistance to wheat powdery mildew, and subcellular localization analysis indicated that TaMCA4D-3 is localized in both the nucleus and cytoplasm.
Conclusions
Collectively, these findings provide new insights into the classification and evolutionary relationships of the
MCA
gene family across plant species and elucidate the role of
MCAs
in wheat resistance to powdery mildew.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Barley
/ Biomedical and Life Sciences
/ Enzymes
/ Genes
/ Humidity
/ Leaves
/ Mildew
/ Virus-induced gene silencing
/ Wheat
