Effects Of Salt Stress On Morphological Structure In Leaves Of Zoysia Sinica Hance And Study On The Development Of Salt Gland

Zoysia sinica Hance is in severe danger in china.It is a twostage wild protectiveplant.It can resist salt stress,alkali stress,hot stress,drought and so on.Themorphological structure in leaves of Zoysia sinica Hance was studied under lightmicroscopy and scanning electron microscope, and the development of salt glands wasemphasized at different NaCl concentration. The results showed the countermeasuresagainst salt stress as follows. Growth of palisade tissue increased with the stimulationof NaCl, just as the vessel of the mid rib. Leaves became smaller with the increase ofNaCl concentrations. In the same process, the cuticle become thicker while stomabecome less in number and smaller in area. There were crystalliferous cells inmesophyllous tissue too.The structure and development about salt glands were studied.The results showed that a salt gland was composed of one stalk cell and one ball cellwith thicker cuticle covered. The salt gland originated from the epidermal cells in theyoung lamina and stems. The initial cell with large vacuole and dense cytoplasmdivided into two daughter cells. Then they formed stalk cell and ball cell. Zoysiasinica Hance possesses many useful characteristics and has become an ideal materialin halophytes filtrating. The research also represents an important part of basic plantbiology, contributing to understanding the mechanism of plant salt tolerance. That willlead to effective means to breed or genetically engineer salt tolerant plants.