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- W2945667099 abstract "Plasma membrane-associated abscisic acid (ABA) signal transduction is an integral part of ABA signaling. The C2-domain ABA-related (CAR) proteins play important roles in the recruitment of ABA receptors to the plasma membrane to facilitate ABA signaling. However, how CAR proteins are regulated remains unclear. In this study, we conducted a genetic screen for mutants with altered leaf transpiration and identified an uncharacterized protein, LOWER TEMPERATURE 1 (LOT1), which regulates the dynamic localization and stability of CAR proteins. The lot1 mutant had a lower leaf temperature as compared with the wild type due to higher transpiration. We found that LOT1 physically interacts with CAR9 , and ABA reduces LOT1–CAR9 interaction in the nucleus, likely via Ca2+, resulting in increased localization of CAR9 to the plasma membrane. We further found that the stability of CAR9 is affected by LOT1 less CAR9 proteins were accumulated and more were ubiquitinated in lot1. While the lot1, car9 and lot1 car9 mutants were hyposensitive to ABA, the hyposensitive phenotype of lot1 could be rescued by CAR9 overexpression. Collectively, our study reveals that LOT1 regulates plant tolerance to drought stress by affecting ABA signaling through regulating the stability and dynamic localization of CAR9." @default.
- W2945667099 created "2019-05-29" @default.
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- W2945667099 date "2019-09-01" @default.
- W2945667099 modified "2023-10-13" @default.
- W2945667099 title "LOWER TEMPERATURE 1 Enhances ABA Responses and Plant Drought Tolerance by Modulating the Stability and Localization of C2-Domain ABA-Related Proteins in Arabidopsis" @default.
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- W2945667099 doi "https://doi.org/10.1016/j.molp.2019.05.002" @default.
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