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Molecules 2018, 23(6), 1365; https://doi.org/10.3390/molecules23061365

Stomatal Complex Development and F-Actin Organization in Maize Leaf Epidermis Depend on Cellulose Synthesis

1
Department of Botany, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
2
Department of Biotechnology, Agricultural University of Athens, 11855 Athens, Greece
*
Authors to whom correspondence should be addressed.
Received: 9 May 2018 / Revised: 3 June 2018 / Accepted: 4 June 2018 / Published: 6 June 2018
(This article belongs to the Special Issue Polysaccharide-based Materials)
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Abstract

Cellulose microfibrils reinforce the cell wall for morphogenesis in plants. Herein, we provide evidence on a series of defects regarding stomatal complex development and F-actin organization in Zea mays leaf epidermis, due to inhibition of cellulose synthesis. Formative cell divisions of stomatal complex ontogenesis were delayed or inhibited, resulting in lack of subsidiary cells and frequently in unicellular stomata, with an atypical stomatal pore. Guard cells failed to acquire a dumbbell shape, becoming rounded, while subsidiary cells, whenever present, exhibited aberrant morphogenesis. F-actin organization was also affected, since the stomatal complex-specific arrays were scarcely observed. At late developmental stages, the overall F-actin network was diminished in all epidermal cells, although thick actin bundles persisted. Taken together, stomatal complex development strongly depends on cell wall mechanical properties. Moreover, F-actin organization exhibits a tight relationship with the cell wall. View Full-Text
Keywords: leaf epidermis; maize; actin; cellulose synthesis; cell wall; stomata; cytoskeleton leaf epidermis; maize; actin; cellulose synthesis; cell wall; stomata; cytoskeleton
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Panteris, E.; Achlati, T.; Daras, G.; Rigas, S. Stomatal Complex Development and F-Actin Organization in Maize Leaf Epidermis Depend on Cellulose Synthesis. Molecules 2018, 23, 1365.

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