SEM Observation on Drought-resistant Structure on Leaves Surface of Broomcorn Millet

In order to discuss the drought-resistant mechanism of broomcorn millet,the drought structure on leaves surface was observed by SEM.The results showed that the upper and lower epidermis were covered with trichomes with the well-developed cuticle,and cuticle on lower epidermis was rough.The epidermal cells were regular in shape with uneven surface,which were composed with long-type cell and short-type cell.These cells arranged along long axis.There were stomata on the two sides of epidermis,the stomata caved in,while the subsidiary cells were more protruding than the subsidiary cell.