Observation of anatomy structure of leaf and ultrastructure of mesophyll cell of Zelkova schneideriana

Microstructure and ultrastructure of leaf of Zelkova schneideriana Hand.-M azz. are reported. The leaf blade is covered with single cell downy hairs, while young leaf was mixed with glandular hairs. Stomata are scattered over the lower-epidermis. The type of stomatal apparatues is anomocytic. The outwalls of uppe r epidermis cell have obvious cuticular thickening. There are two layer cells so mewhere on upper epidermis. The mesophyll was consisted of palisade and spon gy tissue. There are 1-2 layer cells in palisade tissue. The spongy tissue is well developed with ventiating cavity which always link with stomata. Bundle-sh eath of vein was composed of sclerenchyma cells. The crystal cells are found in mesophyll. Matural mesophyll cells have 8-9 oval chloroplasts, the grana lamella s is distinct, starch grains and a few lipid droplets could be seen. When the c olor of leaf is changed, chloroplast become ball. The grana lamellas vary diso rde r and blurring. The lipid droplets are more and more. The microstructure and ul trastructure show some distinguishes among the individuals which leaves in autum n have different colors.