Anatomical features of the leaf mesophyll structure Oryza sativa and Zizania latifolia (Oryzeae, Poaceae)

The study of the spatial organisation of plant leaf chlorenchyma, as the structural basis of photo-synthesis, allows us to characterize it more fully. The morphology of assimilative cells and the structure of the mesophyll of leaf blades and leaf sheaths of generative shoots of Oryza sativa and Zizania latifolia are consid-ered. Leaf samples were fixed in Gammalund's mixture. The assimilative tissue was studied using a light micro-scope on macerated preparations, as well as on transverse and longitudinal sections of leaves. The anatomical structure was considered in the middle part of the leaf blade and the upper third of the sheath part of the leaf. It is shown that the chlorenchyma of the leaf blades of Oryza sativa and Zizania latifolia and the leaf sheaths of Ory-za sativa is composed of flat folded cells with a small participation of cells of a more complex cellular-lobed or folded-cellular shape. More complicated in shape, the cells have lobed configurations on the cross sections and cellular, consisting of two or three sections, in the longitudinal direction. In the mesophyll of the leaf sheaths of Oryza sativa, the lobed shape of the cells is preserved, the chlorenchyma of Zizania latifolia consists mainly of cells of simple shape. The structure of the mesophyll of the leaf blades of Oryza sativa and Zizania latifolia is characterized as simplified bambusoid. The spatial configuration of lobed cells in leaves of grasses with bam-busoid, arundinoid and festucoid types of leaf anatomy was compared. It is shown that these cells can be both flat and more complex, mainly cellular-lobed.