The HKT1 Na+ transporter protects plant fertility by decreasing Na+ content in stamen filaments.
Sci Adv
; 9(22): eadg5495, 2023 06 02.
Article
em En
| MEDLINE
| ID: mdl-37267352
ABSTRACT
Salinity stress can greatly reduce seed production because plants are especially sensitive to salt during their reproductive stage. Here, we show that the sodium ion transporter AtHKT1;1 is specifically expressed around the phloem and xylem of the stamen in Arabidopsis thaliana to prevent a marked decrease in seed production caused by salt stress. The stamens of AtHKT1;1 mutant under salt stress overaccumulate Na+, limiting their elongation and resulting in male sterility. Specifically restricting AtHKT1;1 expression to the phloem leads to a 1.5-fold increase in the seed yield upon sodium ion stress. Expanding phloem expression of AtHKT1;1 throughout the entire plant is a promising strategy for increasing plant productivity under salinity stress.
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Base de dados:
MEDLINE
Assunto principal:
Arabidopsis
/
Simportadores
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Proteínas de Arabidopsis
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article