Abstract: This paper studied the anatomical structure ofDeyeuxia angustifolia stem in the representative meadow, swamp meadow, and swamp of Sanjiang Plain. Six parameters were determined, i.e., cell layers of collenchyma and arenchyma, cell wall thickness of collenchyma, thickness of cortex layer and vascular bundle, and diameter of vessel lumen. The results showed that in the three habitats with different water conditions, the structural components of the stem were basically the same but showed significant differences in their amount and size, indicating that Deyeuxia angustifolia had definite adaptation abilities to the changes of environment.

Key words: Winter wheat, Booting stage, Waterlogging, Root system, Senescence