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CRISPR-Editing of Sweet Basil (Ocimum basilicum L.) Homoserine Kinase Gene for Improved Downy Mildew Disease Resistance.


ABSTRACT: Sweet basil (Ocimum basilicum L.) downy mildew disease (DM) caused by Peronospora belbahrii is a worldwide threat to the basil industry due to the lack of natural genetic resistance in sweet basil germplasm collections. In this study, we used CRISPR-gene editing to modify the sweet basil DM susceptibility gene homoserine kinase (ObHSK). Gene-edited plants challenged with P. belbahrii displayed a significantly reduced susceptibility to DM, based on phenotypic disease indices and on in planta pathogen load. These results suggest that ObHSK plays a role in conditioning DM susceptibility, similar to that observed for the AtHSK gene in Arabidopsis. These results demonstrate the utility of CRISPR-gene editing in enhancing DM resistance and contributing to sweet basil breeding programs.

SUBMITTER: Zhang X 

PROVIDER: S-EPMC8525366 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature

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CRISPR-Editing of Sweet Basil (<i>Ocimum basilicum</i> L.) Homoserine Kinase Gene for Improved Downy Mildew Disease Resistance.

Zhang Xiaoyu X   Low Yee Chen YC   Lawton Michael A MA   Simon James E JE   Di Rong R  

Frontiers in genome editing 20210512


Sweet basil (<i>Ocimum basilicum</i> L.) downy mildew disease (DM) caused by <i>Peronospora belbahrii</i> is a worldwide threat to the basil industry due to the lack of natural genetic resistance in sweet basil germplasm collections. In this study, we used CRISPR-gene editing to modify the sweet basil DM susceptibility gene <i>homoserine kinase</i> (<i>ObHSK</i>). Gene-edited plants challenged with <i>P. belbahrii</i> displayed a significantly reduced susceptibility to DM, based on phenotypic di  ...[more]

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