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Fluctuating auxin response gradients determine pavement cell-shape acquisition
Peter Grones1,2,3, Mateusz Majda1, Siamsa M Doyle1
1Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden.
Summary
Plant pavement cells
Area of Science:
- Plant cell biology
- Developmental biology
- Plant anatomy
Background:
- Puzzle-shaped pavement cells are key models for studying plant cell shape determination.
- Understanding the role of auxin in cell morphogenesis is crucial.
Purpose of the Study:
- To investigate pavement cell shape acquisition in Arabidopsis.
- To elucidate the role of auxin gradients and transport in lobe formation.
Main Methods:
- Focused on young stomatal lineage ground cells in Arabidopsis leaf epidermis.
- Analyzed auxin response gradients and auxin transporter localization during lobe development.
Main Results:
- Demonstrated auxin response gradients form within developing pavement cells.
- Observed fluctuations in auxin gradients correlating with lobe development stages.
- Revealed dynamic changes in auxin transporter localization during lobe formation.
Conclusions:
- Fluctuating auxin response gradients, orchestrated by auxin transport, control pavement cell lobe formation.
- This mechanism is critical for determining final pavement cell shape in Arabidopsis.
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