Leaf Epidermis in Rosaceae: Diversity of the Cuticular Folding and Microstructure
2021
Kumachova, Tamara | Babosha, Alexander | Ryabchenko, Andrey | Ivanova, Tatʹi︠a︡na | Alexander Voronkov,
The micromorphological features of the adaxial and the abaxial leaf epidermis of representatives of ten species of the Rosaceae family were studied. The epidermis of the abaxial side is a complex of different structural and functional cell types: pavement cells, stomata cells and trichomes. Cells of Sorbus aucuparia and Amelanchier sp. contain papillae on the abaxial side, especially there are a lot of them around stomatal guard cells. Various structures unknown among the representatives of Rosaceae were found in Mespilus germanica, Amelanchier sp., Aronia mitschurinii and Crataegus sanguinea. They are noted as colleters and located along the edges of the teeth of the leaf blade, next to the last one and the stipules. For the first time, scaly-lamellar wax deposits were noted in Pyrus communis, although there is an opinion that the wax coating does not occur simultaneously with cuticular folding. It should be noted that all the researched species have a high degree of a correlation between the area of the pavement cells of the abaxial and the adaxial epidermis, which shows us their direct structural and physiological interconnection during their division, growth and development. The results allow us to characterize the epidermis of the leaves of Rosaceae as a compound tissue, and the combination of the structural elements is species-specific and correlates with the growing conditions of plants.
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