Advances in Morphogenesis of Petal Conical Epidermal Cells

doi:10.16420/j.issn.0513-353x.2023-0846

Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (7): 1695-1706.doi: 10.16420/j.issn.0513-353x.2023-0846

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Advances in Morphogenesis of Petal Conical Epidermal Cells

ZHAO Zeyang¹^,², ZHOU Yuqing¹^,², LIN Deshu², REN Huibo²^,^*()

¹ College of Life Science，Fujian Agriculture and Forestry University，Fuzhou 350002，China
² Basic Forestry and Proteomics Research Center，Haixia Institute of Science and Technology，Fujian Agriculture and Forestry University，Fuzhou 350002，China

Received:2024-01-19 Revised:2024-05-31 Online:2024-07-25 Published:2024-07-19
Contact: REN Huibo

Abstract

Abstract:

Most angiosperm species have conical epidermal cells on petal adaxial epidermides. These special shaped cells not only influence the light absorption，light reflection and surface hydrophobicity of petals to make flowers possess and maintain their attraction to pollinators，but also provide grips for pollinators to enhance pollination rate. Because of their important biologic functions and specific cell shape，petal conical epidermal cells are used as a model system to study the mechanisms of cell shape formation. This review explains the analytical method for morphological phenotypes of petal conical epidermal cells. Meanwhile，this review summarizes the current research results and elucidates the roles and possible regulatory mechanisms of MYB transcription factors，TCP transcription factors，zinc finger transcription factors，auxin and cortical microtubule arrays in the morphogenesis of petal conical epidermal cells. These research findings will provide theoretical references to the genetic improvement of horticultural plants.

Key words: petal, conical epidermal cell, transcription factor, auxin, cortical microtubule

ZHAO Zeyang, ZHOU Yuqing, LIN Deshu, REN Huibo. Advances in Morphogenesis of Petal Conical Epidermal Cells[J]. Acta Horticulturae Sinica, 2024, 51(7): 1695-1706.

Figures/Tables 3

Fig. 1 Petal conical epidermal cells of Arabidopsis A：The adaxial and abaxial of epidermis petals. B：Petal. C：Electron microscope magnification of petals. D-E：The bottom（D）and lateral（E）confocal images of petal epidermal conical cells stained by propidium iodide. F：A scanning electron microscope image of the cuticular striations on the surface of petal epidermal conical cells. G-H：Fluorescent-labeled microtubule transgene material GFP-TUA6 arrays of microtubules in petal conical epidermal cells under confocal top microscopy（G）and side view（H）. H provided by Dang Xie（Center of Forestry，Straits Joint Research Institute，Fujian Agriculture and Forestry University）. Ren et al.，2017；Dang et al.，2018.

Fig. 2 Analyses of the morphological phenotypes of petal epidermal conical cells Ren et al.，2017；Dang et al.，2020a.

Fig. 3 A proposed model of the shape formation mechanism of petal conical epidermal cells The arrows indicate positive regulation，and the perpendicular lines indicate negative regulation. Glover et al.，1998；Crawford et al.，2004；Dinneny et al.，2004；Takeda et al.，2013；Saffer & Irish，2017；Dang et al.，2018，2020b；Ren et al.，2022.

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Advances in Morphogenesis of Petal Conical Epidermal Cells

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