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不同高粱品种的通气组织发达程度,与其抗涝性成正比,即通气组织比较发达的品种,其外部形态的抗涝表现亦较好,植株的地上部分及根系在淹涝情况下亦发育较正常。高粱根及叶鞘中通气组织出现的时间较水稻晚,发达程度较水稻差,但比玉米出现早而发达。水稻茎与叶主脉中也有通气组织,高粱则仅在根及叶路中有,玉米仅在次生根内有不太发达的通气组织,谷子在各器官中全无通气组织。这决定了四种作物抗涝力的顺序性。
The development of aerenchyma of different sorghum cultivars is proportional to their waterlogging resistance, that is, the more developed aerenchyma, the external morphology of which is better than that of the waterlogging tolerant plants. The aboveground parts and root systems of plants also developed more than normal under the conditions of submergence . Ventilation tissues in sorghum roots and sheaths appeared later than rice, developed less well than rice but earlier than maize. The stems and leaves in the main vein of rice also have ventilation tissue, sorghum only in the roots and leaves of the road, corn only in the secondary root within the less developed ventilation organizations, miltiorrhiza in all organs without ventilation. This determines the order of the four crops’ waterlogging resistance.