The Distribution of Stomata on the Different Organs of Zephyranthes candida

The epidermis of flowers,scape,bulb,leaves,fruits,seeds and roots of Zephyranthes candida plants were investigated under light microscope.The stomatal index,stomatal density,guard cell length and width of the upper and lower petal surface,epidermis of scape,exocarp and adaxial and abaxial leaf epidermis were compared.The relevances between stomatal density and guard cell area on the petal and leaf were analyzed respectively.The results show that there are stomata in the surface of petal,stamen,pistil,ovary,peduncle,scape,bulb scale,fruit and seed besides the conventional parts such as leaves and stems.But the stomata are absent from the root.The stomata are kidney-shaped and not rounded by subsidiary cells.The stomatal index and stomatal density on the adaxial leaf epidermis are significantly greater than on the abaxial(P0.05).The stomatal index and stomatal density on the scape and leaf are significantly greater than on the petal and fruit(P0.05).The stomatal index and stomatal density reach minimum on the exocarp.The guard cell area is largest on the abaxial leaf epidermis(P0.01),but smallest on the lower petal surface(P0.01).There is no significant correlation between the stomatal density and guard cell area on the petal(γ=0.089,P0.05).An extremely significant negative correlation is observed between the stomatal density and guard cell area on the leaf(γ=-0.535,P0.01).