Under aerobic condition,the formation of root aerenchyma of upland rice was the latest among five rice genotypes.And cortex sclerenchymatous cells in conventional japonica root arranged loosely.

• 旱作条件下旱稻的根通气组织形成较其他基因型晚,常规粳稻根皮层厚壁细胞排列疏松,细胞壁加厚程度小。