A role for the OsHKT 2;1 sodium transporter in potassium use efficiency in rice.
J Exp Bot
; 71(2): 699-706, 2020 01 07.
Article
em En
| MEDLINE
| ID: mdl-30854552
ABSTRACT
Increasing the potassium use efficiency (KUE) of crops is important for agricultural sustainability. However, a greater understanding of this complex trait is required to develop new, high-KUE cultivars. To this end, a genome-wide association study (GWAS) was applied to diverse rice (Oryza sativa L.) genotypes grown under potassium-stressed and -replete conditions. Using high-stringency criteria, the genetic architecture of KUE was uncovered, together with the breadth of physiological responses to low-potassium stress. Specifically, three quantitative trait loci (QTLs) were identified, which contained >90 candidate genes. Of these, the sodium transporter gene OsHKT2;1 emerged as a key factor that impacts on KUE based on (i) the correlation between shoot Na+ and KUE, and (ii) higher levels of HKT2;1 expression in high-KUE lines.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Plantas
/
Potássio
/
Oryza
/
Proteínas de Transporte de Cátions
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
J Exp Bot
Ano de publicação:
2020
Tipo de documento:
Article