PRELIMINARY SURVEY ON STOMATAL DENSITY AND LENGTH OF GRAPEVINE

For stomatal density and length, a preliminary survey of 40 grapevines and its wild relatives, Muscadinia rotundifolia was conducted. Within genus Vitis, the stomatal density and length of the diploid cultivars ranged between 140 and 300/mm(2) and between 20 and 30 mu m, respecti vely. On the other hand, the stomatal density and length of the tetrap loid cultivars ranged between 80 and 120/mm(2) and between 32 and 37 m u m, respectively. Stomatal density of relatives of genus Vitis, Musca dinia rotundifolia was about 400/mm(2), and the stomatal length was ab out 19 mu m. These results suggest that genetic differentiation in sto matal density and length may occurred within family Vitaceae.