고추種字의 低溫發芽性에 關한 硏究 Ⅱ. 果実의 登熟 및 貯藏이 種子의 低溫發芽性에 미치는 影響

Studies on the Germination Ability of Pepper Seeds at Low Temperature Ⅱ. Effects of Maturity and Storage of Pepper Seeds on the Germinability at Low Temperature

The effects of maturity and after-ripening of pepper seeds on germinability at low temperature (10℃) and also the effects of storage duration and condition of seeds were studied. 8 pepper varieties were used in the study, which produce typical germinability at low temperature. There was varietal differences in percentage of seed filling as influenced by days after flowering. In the protein content, “Saegochu” showed the peak about 40 days after flowering. and “Mexico” and “Texans” it about 50 days. At low temperature germination of pepper seeds decreased remarkably at the immature stage, and varietal. differences were recognized as nonsignificant, but it as significant at about 45 days after flowering. The varieties with high and low germinabilities at low temperature produced some germination about 35 and 50 days after flowering, respectively. The former increased sharply in germination coefficient around 60% seed weight of fully developed seed, but the latter remained unchangeable. There was significant simple correlation between germination coefficient, dry weight of 1000 seeds, days after flowering and protein content. In partial correlation, germination coefficient and days after flowering were correlated indicating that similar correlation would be found in the different dry weight of 1000 seeds, but germination coefficient and dry weight of 1000 seeds were not correlated suggesting that they are not correlated within a few same days group after flowering. Days to after-ripening showed significantly positive correlation with germination coefficient as days after flowering shortened. But pepper seeds, which was harvested about 35 or 40 days after flowering and after-ripened for 10 days, has the better germinability at low temperature. The difference in the germinability of pepper seeds stored between low and room temperatures may be attributed to temperature rather than humidity. The germination was highest at normal harvest, so pepper seeds can be considered as nondormant. Varietal differences in the germination at low temperature could be detected within 6 months in the case of storage under room temperature, and within 18 months in the case of desiccator storage under room temperature.