2017 ASHS Annual Conference

We investigated the effect of high temperature to root water permeability of tomato seedlings. In summer cultivation, plants are frequently exposed to high temperature stress. It is well known that the high temperature stress has many physiological effect to plants, one of this, the water absorption from the root. In this study, we investigated how high temperature affected to water permeability of tomato plants.

We used tomato varieties ‘Reiyo’, ‘Dundee’ and ‘Starbuck’ for this experiment. The seedlings were grown on hydroponic culture in incubators, and obtained at 20 days after sawing. High temperature (35 oC; control 23 oC) was applied to seedlings at different growth stages. Water permeability was estimated by using a pressure chamber and a root scanner.

In the result, when plants were grown at high temperature, the water permeability was increased dramatically, although we were not able to find the difference among varieties. When the timing for applying high temperature stress were different during growth stages, the permeabilities were remained higher.

We further investigate the response to high temperature for different varieties.