Mutation of Os4BGlu18, monolignol β-glucosidase, improves salinity insensitivity in a rice

Seo, Hyeon Ung; Oh, Su Hong; Jang, Cheol Seong

doi:10.1016/j.envexpbot.2022.105076

Environmental and Experimental Botany

2022

DOI: 10.1016/j.envexpbot.2022.105076

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Mutation of Os4BGlu18, monolignol β-glucosidase, improves salinity insensitivity in a rice

Hyeon Ung Seo

Su Hong Oh

Cheol Seong Jang

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2024

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Cited by 1 publication

References 47 publications

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Mutation of a gene with PWWP domain confers salt tolerance in rice

Seo,

Jang

2024

Preprint

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Salinity is a major problem due to the continuous increase in the salinization of agricultural lands, particularly, paddy fields. Using a forward genetics approach, salt-insensitive TILLING (targeting-induced local lesions in genomes) line 3, sitl3, was selected from a core population induced by gamma-ray irradiation. Under salt stress, sitl3 had greater fresh weight and chlorophyll content, and lower H2O2 and Na+ contents than the wild-type. In the gene (LOC_Os07g46180) with two PWWP domains (OsPWWP4) of sitl3, a premature stop was caused by an SNP, and was named OsPWWP4p.Gly462* (a stop gain occurred from the 462th amino acid residue). The OsPWWP4 and substrate proteins (OsEULS2, OsEULS3, and OsEULD2) were identified using yeast two-hybrid, bimolecular fluorescence complementation, in vitro pull-down, and in vitro methyltransferase assays. Subcellular localization of OsPWWP4 and OsPWWP4p.Gly462*GFP-tagged proteins revealed they were both localized in the nucleus, while OsEULS2, OsEULS3, and OsEULD2 GFP-tagged proteins were found in the nucleus and cytosol of rice protoplasts. The expression levels of OsEULS2, OsEULS3, OsEULD2 under salt stress were higher in sitl3 than in wild-type plants. In contrast, OsPWWP4 expression was higher in the latter. Genes involved in the salt overly sensitive (SOS) pathway showed higher expression in the aerial tissues of silt3 than in the wild-type. Our data suggest that TILLING line sitl3 is a valuable genetic resource for understanding protein post-translational regulation-related salinity tolerance mechanisms such as methyltransferase activities, and for improving salt tolerance in rice through breeding.

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Mutation of a gene with PWWP domain confers salt tolerance in rice

Seo,

Jang

2024

Preprint

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Mutation of Os4BGlu18, monolignol β-glucosidase, improves salinity insensitivity in a rice

Cited by 1 publication

References 47 publications

Mutation of a gene with PWWP domain confers salt tolerance in rice

Mutation of a gene with PWWP domain confers salt tolerance in rice

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