Growth and cell wall changes in rice coleoptiles growing under different conditions I. Changes in turgor pressure and cell wall polysaccharides during intact growth

摘要

The effect of the oxygen supply on growth, water absorption of cells and cell wall changes was studied in coleoptiles of rice seedlings growing under three different conditions: under water, under water with constant air bubbling and in air. Coleoptile growth was larger when they were grown under water than in water with air bubbling and in air. Coleoptile growth under water was limited by the suction force of their cells rather than by mechanical properties of the cell wall, while that of the coleoptiles growing under the other two conditions was limited by the cell wall rigidity. A decrease in the relative amount of noncellulosic glucose of the cell wall, and an increase in the noncellulosic xylose during coleoptile growth were found for all three culture conditions.