Study on the Salt Tolerance of Rice and Other Crops in Reclaimed Soil Areas 11. On the Histological Differences Between the Roots of the Salt, Land and Water Bed Seedlings of Rice and their Rooting in Saline Soil

간척지에서 수도 및 기타작물의 내염성에 관한 연구 11. 수도의 염분묘 및 수묘근의 조직학적 차이와 염분지에서의 발근에 관하여

The rice variety, Kwanok, was reared in the water, land and salt seed beds and transplanted to the reclaimed soil area having an average of 0.48% salt content (0.67% at the end of April). The plant height of land bel seedlings at transplanting stage was short but the dry-weight/plant-height ratio was large and the rooting ability was vigorous remarkably after transplantation in the salty area. The central cylinder, vessels, sclerenchyma, endodermis and other mechanical tissues of the root of land bed seedlings were well developed while the size of cortical cell layers were small. The cytoplasm of the cortical parenchyma at the root tips seemed to be most abundant in the land bed seedlings. The formation of the aerial cavity in the cortex of primary root was rapid and it seemed that the developmental mechanism of the aerial cavity in the rice plant roots was related to the development of the lateral roots.