Seed longevity of perilla (Perilla frutescens (L.) Britt var. frutescens)

Seed longevity of perilla (Perilla frutescens (L.) Britt var. frutescens)

2000

A:PS

Seed dormancy of the Japanese oil crop perilla (Perilla frutescens var. frutescens) was investigated. Germination rates of the crop at one month after harvest were high and no seed dormancy was observed. Seed longevity of perilla was monitored using accelerated aging treatment with 5øC, 15øC, 25øC and 35øC temperature conditions. Perilla seeds, which were stored with low seed moisture content under low temperature conditions, have a high longevity. The seeds can be stored at least for one year and half at room temperature. Average viability constants of Kv, C1 and C2 for perilla were 3.994, 0.017 and 0.036, respectively. Constant Kv was smaller for perilla than rice, wheat and buckwheat. Storage at sub-zero temperatures of -1øC and -10øC extended the longevity of perilla seeds. The theoretical half life of perilla seeds is approximately 50 years under storage conditions of 5% seed moisture content and -10øC temperature.

v.28(3):875-879, SEED SCIENCE AND TECHNOLOGY

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