Formation of Root Hair in Lateral Rots of Rice Plants

The formation of the root hair in the lateral roots of rice plants has not yet been ascertained. This investigation was carried on to ascertain the root hair formation in lateral roots. The root hairs were formed in the secondary (Figs. 1 and 2), tertiary (Fig. 3), fourth (Fig. 4) and the fifth lateral roots (Fig. 5). Generally, the epidermal cells of the lateral roots were composed of two types; the short cells and the long cells. And the root hairs of the lateral roots were formed in the short cell, as in the crown roots - primary roots. The root hairs in the sixth lateral roots were not observed, but there appeared two types of the epidermal cells; short epidermal cells and long epidermal cells (Fig. 6). It was also found that when the diameter of the lateral roots was thick, the root hair formation and their growth in the lateral roots was accelerated than in the case when diameter of the lateral roots was thin. As regards the effect of nitrogen fertilizer on root hair formation and their growth in the lateral roots, it was also found that the root hair formation and their trowth in the lateral roots was accelerated, as compared with that nitrogen fertilizer of high level were given to the rice plants.