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- W4384024349 abstract "Abstract The mechanical properties of guard cells have major effects on stomatal functioning. Reinforced stiffness in the stomatal polar regions was recently proposed to play an important role in stomatal function, but the underlying molecular mechanisms remain elusive. Here, we used genetic and biochemical approaches in poplar (Populus spp.) to show that the transcription factor MYB156 controls pectic homogalacturonan–based polar stiffening through the downregulation of the gene encoding pectin methylesterase 6 (PME6). Loss of MYB156 increased the polar stiffness of stomata, thereby enhancing stomatal dynamics and response speed to various stimuli. In contrast, overexpression of MYB156 resulted in decreased polar stiffness and impaired stomatal dynamics, accompanied by smaller leaves. Polar stiffening functions in guard cell dynamics in response to changing environmental conditions by maintaining normal stomatal morphology during stomatal movement. Our study revealed the structure–function relationship of the cell wall of guard cells in stomatal dynamics, providing an important means for improving the stomatal performance and drought tolerance of plants." @default.
- W4384024349 created "2023-07-13" @default.
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- W4384024349 date "2023-07-12" @default.
- W4384024349 modified "2023-10-12" @default.
- W4384024349 title "The transcription factor MYB156 controls the polar stiffening of guard cell walls in poplar" @default.
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- W4384024349 doi "https://doi.org/10.1093/plcell/koad198" @default.
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- W4384024349 hasPublicationYear "2023" @default.
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