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标题：Fluctuating auxin response gradients determine pavement cell-shape acquisition
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作者：Peter Grones ; Mateusz Majda ; Siamsa M. Doyle 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2020
卷号：117
期号：27
页码：16027-16034
DOI：10.1073/pnas.2007400117
出版社：The National Academy of Sciences of the United States of America
摘要：Puzzle-shaped pavement cells provide a powerful model system to investigate the cellular and subcellular processes underlying complex cell-shape determination in plants. To better understand pavement cell-shape acquisition and the role of auxin in this process, we focused on the spirals of young stomatal lineage ground cells of Arabidopsis leaf epidermis. The predictability of lobe formation in these cells allowed us to demonstrate that the auxin response gradient forms within the cells of the spiral and fluctuates based on the particular stage of lobe development. We revealed that specific localization of auxin transporters at the different membranes of these young cells changes during the course of lobe formation, suggesting that these fluctuating auxin response gradients are orchestrated via auxin transport to control lobe formation and determine pavement cell shape.
关键词：Arabidopsis ; pavement cells ; auxin response gradient ; auxin transporter ; lobe formation