水分不足を経験したグレインソルガム根の生育と働きについて

概要

論文の詳細を見る
In the previous irrigation, drought and wilting experiments an inconsistency was observed for the data of root. Therefore, further investigations were needed. The results obtained are as follows : 1. When irrigation was stopped, plant water stress gradually became severe. It was observed a temporary wilting in lower leaves at leaf water potential about -20Kg/cm^2 and in all leaves at about-30Kg/cm^2. 2. When water-stressed plants were rewatered, an acceleration in plant water uptake was observed for about 10 days from rewatering. It may be due to plasmolysis during drought and turgescence after rewatering, and also due to an increase in transpiration by rewatering. 3. With imposition of 10 days drought and/or foliar spray applications of NAA and tryptsphan at 6 leaf stage no increase was observed in length and weight of roots in plants which were sampled at flag leaf stage compared with control. 4. The number of newly elongated roots in excised plants which were irradiated by X-ray decreased than in non-irradiated plants due to auxin degradation. The number of newly elongated roots in excised plants which already were grown under low soil moisture conditions were higher than in plants grown under high soil moisture conditions.
日本作物学会の論文
1980-03-31