HIGH TEMPERATURE RESISTANCE OF YARD LONG BEAN (VIGNA UNGUICU LATA L. WALP. SUB. SP. SESQUIPEDALIS L. VERDC.) SEEDS.

Yard long bean seeds treated with dry hot air at 75°C for 7 days after predried at 45°C for 1 day could maintain their quality the same as untreated seeds over one year in a sealed tin can when they were stored in cold room (10°C, 55% RH). When these heat-treated seeds were stored over 6 months at room temperature (22–37°C, 57–89% RH), the percentage of emergence reduced at least 20% and 7-day seedling leaf area and 14-day seedling dry weight were decreased, although the percentage of germination was maintained until 1 year.
Thermal injury did not appear in seedling of heat-treated yard long bean seeds so long as they were dried prior to the treatment and stored at 10°C, although the seeds immediately showed changes in biochemical indices such as electrical conductivity of seed leachate, water uptake rate, CO₂ output and -amylase activity.

Seed Research in Horticulture

P. Thiraporn, T. Takano, A. Choomsai

https://doi.org/10.17660/ActaHortic.1987.215.13