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- W3188695110 abstract "The abscisic acid (ABA) signalling pathway is involved in the plant response to osmotic stress caused by drought and/or salinity. Although the ABA signalling pathway has been elucidated in Arabidopsis, it remains elusive in woody poplars. In this study, genome-wide analyses of U-box genes in poplars revealed that a U-box E3 ubiquitin ligase gene, PalPUB79, is significantly induced following drought, salinity and ABA signalling. PalPUB79 overexpression enhanced drought tolerance in transgenic poplars, while PalPUB79 RNAi lines were more sensitive to drought. PalPUB79 positively regulated ABA signalling pathway. Furthermore, PalPUB79 interacted with PalWRKY77, a negative transcriptional regulator of ABA signalling, and mediated its ubiquitination for degradation, therefore counteracting its inhibitory effect on PalRD26 transcription. However, the finding that PalWRKY77 negatively regulates PalPUB79 expression was indicative of a negative feedback loop between PalWRKY77 and PalPUB79 during ABA signalling in poplar. These findings provide novel insight into the mechanism through which PalPUB79 enhances the ABA-mediated stress response in woody poplars." @default.
- W3188695110 created "2021-08-16" @default.
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- W3188695110 date "2021-08-22" @default.
- W3188695110 modified "2023-10-17" @default.
- W3188695110 title "The U‐box E3 ubiquitin ligase PalPUB79 positively regulates ABA‐dependent drought tolerance via ubiquitination of PalWRKY77 in <i>Populus</i>" @default.
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- W3188695110 doi "https://doi.org/10.1111/pbi.13681" @default.
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