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Diagnostic kit for rice blight resistance.

ABSTRACT: Blight-resistant rice lines are the most effective solution for bacterial blight, caused by Xanthomonas oryzae pv. oryzae (Xoo). Key resistance mechanisms involve SWEET genes as susceptibility factors. Bacterial transcription activator-like (TAL) effectors bind to effector-binding elements (EBEs) in SWEET gene promoters and induce SWEET genes. EBE variants that cannot be recognized by TAL effectors abrogate induction, causing resistance. Here we describe a diagnostic kit to enable analysis of bacterial blight in the field and identification of suitable resistant lines. Specifically, we include a SWEET promoter database, RT-PCR primers for detecting SWEET induction, engineered reporter rice lines to visualize SWEET protein accumulation and knock-out rice lines to identify virulence mechanisms in bacterial isolates. We also developed CRISPR-Cas9 genome-edited Kitaake rice to evaluate the efficacy of EBE mutations in resistance, software to predict the optimal resistance gene set for a specific geographic region, and two resistant 'mega' rice lines that will empower farmers to plant lines that are most likely to resist rice blight.

SUBMITTER: Eom JS

PROVIDER: S-EPMC6831515 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature

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Diagnostic kit for rice blight resistance.

Eom Joon-Seob JS Luo Dangping D Atienza-Grande Genelou G Yang Jungil J Ji Chonghui C Thi Luu Van V Huguet-Tapia José C JC Char Si Nian SN Liu Bo B Nguyen Hanna H Schmidt Sarah Maria SM Szurek Boris B Vera Cruz Casiana C White Frank F FF Oliva Ricardo R Yang Bing B Frommer Wolf B WB

Nature biotechnology 20191028 11

Blight-resistant rice lines are the most effective solution for bacterial blight, caused by Xanthomonas oryzae pv. oryzae (Xoo). Key resistance mechanisms involve SWEET genes as susceptibility factors. Bacterial transcription activator-like (TAL) effectors bind to effector-binding elements (EBEs) in SWEET gene promoters and induce SWEET genes. EBE variants that cannot be recognized by TAL effectors abrogate induction, causing resistance. Here we describe a diagnostic kit to enable analysis of ba ...[more]

PMID: 31659338

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Diagnostic kit for rice blight resistance.

Publications

Diagnostic kit for rice blight resistance.

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