Effects of GA<SUB>3</SUB> Treatment Duration and Chilling Treatment Before Sowing on the Germination of Seed-Propagated Dry Wasabi Seeds

Abstract

In this study, we investigated the effects of GA3 treatment duration and chilling treatment before sowing, and germination temperature on the germination of dried wasabi (Wasabia japonica (Miq.) Matsum.) seeds in October sowing. As the GA3 treatment duration before sowing increased to 10 days, the germination rate improved significantly. The germination rate at 15 ℃ was higher than those at 10 ℃ and 20 ℃. However, using the seeds treated with GA3 for 10 days followed by wet chilling treatment at 5 ℃ for 10 days, germination rates at 10 ℃ and 20 ℃ were improved, i.e., respectively, 63 % and 69 %, and have almost the same germination rate at 15 ℃. Since the germination rate of seeds treated with low temperature after GA3 treatment was high in a wide temperature range, it may be possible to construct a systematic seeding raising system even in October when germination is unstable.

Accelerated germination of aged recalcitrant seeds by K+-rich bulk oxygen nanobubbles

“…In addition to water-wasabi, other valuable plant crops such as mango, lychee, jackfruit, oil palm, and cocoa, which may show price increases linked to supply problems caused by climate change, COVID-19, or the Ukraine conflict, can benefit from this technology. In other studies of wasabi germination, although the germination rate of recalcitrant wasabi seeds increased with gibberellin treatment, neither the mechanism promoting germination nor the implication for food safety is well elucidated 23 .…”