Abstract
For the maintenance of shoot growth and the survival under the osmotic stress condition, it is considered that the maintenance of root growth, the expansion of root system and the maintenance of water and nutrients absorption have the important key. Root elongation involves both cell elongation and cell production. Additionally, the root system consists largely of many lateral roots and lateral root has an important role for the plant growth under osmotic stress condition. It was suggested that allocation of photosynthate is one of the main factors that regulate lateral root development in root systems. In this paper, we review the previous studies focused on (1) the relationship between root elongation and root osmotic adjustment for the maintenance of turgor pressure under the osmotic stress condition, (2) the effect of osmotic stress for the cell production and root elongation and (3) the role of sugar accumulation for the lateral root development under the osmotic stress condition.
