The effects of cadmium on the germination and seminal root growth in Fagopyrum crops [Japanese]

摘要

To obtain a basic knowledge of the cadmium resistance of the Fagopyrum crops (common buckwheat [Fagopyrum esculentum] and Tartary buckwheat [Fagopyrum tataricum]), the effect of the germination rate and seminal root growth were examined by using the seed-pack growth pouch that filled the cadmium chloride solution. Paddy rice, upland rice (Oryza sativa), sorghum (Sorghum bicolor), rape (Brassica napus), and leaf mustard (Brassica juncea) were used as comparison crops. There was no effect of 100 ppm or less cadmium on the germination rate except with paddy rice, but except for leaf mustard, the main root elongation was inhibited. The order in which cadmium resistance was regarded : paddy rice, upland rice, sorghum, common buckwheat, Tartary buckwheat, rapeseed, and leaf mustard. In 15 varieties of common buckwheat and 3 varieties of Tartary buckwheat, there was the continuous varietal differences of cadmium resistance. These results show that it may be possible to select cadmium resistance lines. It is also expected that buckwheat crops will become new materials for phytoremediation.