Abstract
In the previous paper, the author reported that there was some tendency among cold resistance trees, which included many individuals of late-ripe legurne or late-flowering trees. This paper is concerned with the inheritance of correlation between the cold-resistance and the ripe period of legume. The materials used were natural pollinated progenies of seven trees and each of the trees differing in ripening period of the legumes, Radicular epidermis of the 4-day-old seedlings (4 days after germination) was used as the material fcr plasmolysis. Germination of the seedlings was done in the ther-mostat. The 40-day-old seedlings were used in order to look for the effect of low temperature and of the toxic action of chlorate. Four reagents, CO(NH2)2, KN03, CaCl2, and KC1+Cal2 (8 : 2), were used as the plasmolyticum. The correlation between the degree of plasmolysis and the strains was found in the CaCl2 solution alone, but not in other three reagents. There exi-sted the negative correlation between the damage' of seedlings by the low temperature at -2°C∼-3°C for 24 hours, and susceptibility to KC1O3. These results agreed with those of the previous workers. Among the plasmolysis with the CaC12 solution, thet injury by low temperature treatment, the suscepti-bility to KC1O3 and the ripe period of legume (or flowering period) existed the high correlation. The strains of later ripe period of legume had a stronger power of resistance to the low temperature. This results agrees with that of the previous paper. This correlation may be the inheritant character.
