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Plant Molecular Biology Reporter

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Institución detectada	Período	Navegá	Descargá	Solicitá
No detectada	desde jun. 1996 /	EBSCOHost

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Tipo de recurso:

revistas

ISSN impreso

0735-9640

ISSN electrónico

1556-469X

Editor responsable

Springer Nature

País de edición

Reino Unido

Fecha de publicación

1983-

Cobertura temática

Ciencias biológicas

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doi: 10.1007/s11105-021-01299-2

A Maize (Zea mays L.) BIK1-Like Receptor-Like Cytoplasmic Kinase Contributes to Disease Resistance

Weiran Li; Chao-Jan Liao; Burt H. Bluhm; Tesfaye Mengiste; Charles P. Woloshuk

<jats:title>Abstract</jats:title><jats:p>Receptor-like cytoplasmic kinases (RLCKs) form a large subfamily of proteins in plants. RLCKs are known to regulate plant immunity to bacterial and fungal pathogens. In this study, we analyzed the genome-wide complement of maize RLCK genes and conducted detailed studies on one maize RLCK. The maize genome encodes 192 RLCKs that largely mirror the RLCK family in other plants. Previous studies implicated Arabidopsis BOTRYTIS INDUCED KINASE1 (BIK1) and TOMATO PROTEIN KINASE 1b (TPK1b) in plant resistance to the bacterial pathogen <jats:italic>Pseudomonas syringae</jats:italic> and the fungal pathogen <jats:italic>Botrytis cinerea</jats:italic>. A novel maize RLCK, <jats:italic>Zea Mays BIK1-LIKE KINASE 1 (ZmBLK1)</jats:italic>, was identified based on sequence similarity to the tomato and Arabidopsis RLCKs. We demonstrated that ZmBLK1 displays protein kinase activity in vitro and the protein localizes to the plasma membrane. Importantly, expression of <jats:italic>ZmBLK1</jats:italic> partially rescued the growth and disease phenotypes of the Arabidopsis <jats:italic>bik1</jats:italic> mutant plants. The expression of <jats:italic>ZmBLK1</jats:italic> was induced in maize at 12 h after inoculation with <jats:italic>Clavibacter michiganensis</jats:italic> subsp. <jats:italic>nebraskensis</jats:italic> (CMN), the bacterial pathogen causing Goss’s wilt. Interestingly, overexpression of <jats:italic>ZmBLK1</jats:italic> in transgenic maize increased resistance to CMN but did not impact resistance to Aspergillus ear rot caused by the fungal pathogen <jats:italic>Aspergillus flavus</jats:italic> and the associated aflatoxin contamination. These findings support our hypothesis that <jats:italic>ZmBLK1</jats:italic> contributes to plant resistance to bacterial pathogens likely by modulating events early after pathogen infection, implying that the protein may interact with other membrane proteins early in the immune response pathway.</jats:p>