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Suppression of DRR1 results in the accumulation of insoluble ubiquitinated proteins, which impairs drought stress tolerance.
- Source :
- Journal of Integrative Plant Biology; Mar2021, Vol. 63 Issue 3, p431-437, 7p
- Publication Year :
- 2021
-
Abstract
- Summary: 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16729072
- Volume :
- 63
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Integrative Plant Biology
- Publication Type :
- Academic Journal
- Accession number :
- 149047086
- Full Text :
- https://doi.org/10.1111/jipb.13014