Studies on the Development of the Young Stems of Pinus kwangtungensis
Zou Li-hua · Guangxi kexue · 2007
Transmission electron microscope and optical microscope technique were applied in the study of the morphology, development and starch grains in cells of terminal buds and young stems of Pinus kwangtungensis.Result is as follows: Shoot apex zones were appeared in the late period of terminal buds scale formation.The plastid,mitochondrium,endoplasmie reticulum distribution and quantity fitted the droughty living environment in the terminal bud cells, young stem cells.The cortex and the primary xylem of the young stem had resin ducts from 12～18 cells arranging the lotus form.There is a certain relationship between the dynamics state change of starch grains before and after maturity and development in resin ducts.With the growth of the organizations the starch grains in the parenchyma cells shows a non to a rich dynamics state change.