Location: Plant Science ResearchTitle: A maize caffeoyl-CoA O-methyltransferase gene confers quantitative resistance to multiple pathogens Author
|El Kasmi, Farid|
Submitted to: Nature Genetics
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/1/2017
Publication Date: 6/1/2017
Citation: Yang, Q., He, Y., Kabahuma, M., Chaya, T., Kelly, A., Borrego, E., Bian, Y., El Kasmi, F., Yang, L., Teixeira, P., Kolkman, J., Nelson, R., Kolomiets, M., Dangl, J., Wisser, R., Caplan, J., Li, X., Lauter, N.C., Balint Kurti, P.J. 2017. A maize caffeoyl-CoA O-methyltransferase gene confers quantitative resistance to multiple pathogens. Nature Genetics. 49:1364-1372. Interpretive Summary: In this paper we describe the identification of a gene that is involved in resistance to two important leaf diseases of maize: Gray leaf spot and southern leaf blight. The gene is ZmCCoAOMT2, which encodes a caffeoyl-CoA O-methyltransferase enzyme associated with the production of the structural organic polymer lignin. We show that increased expression of the gene is associated with increased resistance and increased levels of lignin.
Technical Abstract: Alleles that confer multiple disease resistance (MDR) are valuable in crop improvement though molecular mechanisms underlying their functions remain largely unknown. A QTL, qMdr9.02, associated with resistance to three important foliar maize diseases, southern leaf blight (SLB), gray leaf spot (GLS) and northern leaf blight (NLB) had been identified on maize chromosome 9. Through fine mapping, association analysis, expression analysis, insertional mutagenesis, and transgenic validation, we demonstrate that ZmCCoAOMT2, which encodes a caffeoyl-CoA O-methyltransferase enzyme associated with the phenylpropanoid pathway and lignin production, is the gene within qMdr9.02 conferring quantitative resistance to both SLB and GLS.