ArticleThe Plant cell2023
The transcription factor MYB156 controls the polar stiffening of guard cell walls in poplar.
Article in The Plant cell, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 11 citations in OpenAlex.
- Modelling stomatal mechanics: a critical review.The New phytologist · 2026Review
- Esterified-pectin-coupled polar stiffening controls grass stomatal opening.Nature plants · 2026Article
- A review of guard cell wall architecture in shaping stomatal morphology and function.Frontiers in plant science · 2026Review
- Pectin methylesterase inhibitor 58 negatively regulates ray petal elongation by inhibiting cell expansion in Gerbera hybrida.Plant cell reports · 2025Article
- Advanced imaging-enabled understanding of cell wall remodeling mechanisms mediating plant drought stress tolerance.Frontiers in plant science · 2025Review
Corrections and comments
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
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.
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Registered trials
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