Suppression of DRR1 results in the accumulation of insoluble ubiquitinated proteins, which impairs drought stress tolerance.
J Integr Plant Biol
; 63(3): 431-437, 2021 Mar.
Article
en En
| MEDLINE
| ID: mdl-32910530
ABSTRACT
Drought stress has detrimental effects on plants. Although the abscisic acid (ABA)-mediated drought response is well established, defensive mechanisms to cope with dehydration-induced proteotoxicity have been rarely studied. DRR1 was identified as an Arabidopsis drought-induced gene encoding an ER-localized RING-type E3 Ub ligase. Suppression of DRR1 markedly reduced tolerance to drought and proteotoxic stress without altering ABA-mediated germination and stomatal movement. Proteotoxicity- and dehydration-induced insoluble ubiquitinated protein accumulation was more obvious in DRR1 loss-of-function plants than in wild-type plants. These results suggest that DRR1 is involved in an ABA-independent drought stress response possibly through the mitigation of dehydration-induced proteotoxic stress.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Estrés Fisiológico
/
Adaptación Fisiológica
/
Arabidopsis
/
Proteínas de Arabidopsis
/
Ubiquitina-Proteína Ligasas
/
Sequías
/
Proteínas Ubiquitinadas
Idioma:
En
Revista:
J Integr Plant Biol
Año:
2021
Tipo del documento:
Article