Sensibility Variation of Cadmium Uptake and Accumulation among Flue-cured Tobacco Varieties

Cadmium(Cd) influences tobacco growth, and its uptake and distribution in tobacco vary with tobacco varieties. In order to identify the low cadmium accumulation tobacco varieties, pot experiments were carried out to study the differences in Cd uptake sensitivity among 10 flue-cured tobacco varieties. The results showed that effects of Cd on tobacco growth varied significantly with varieties. The roots of NC89, Longjiang851 and Cuibi 1 were more sensitive to Cd toxicity reaction; the roots of Yunyan85 and Yuyan3 had stronger tolerance to Cd. Both the low and high Cd contents could promote the growth of tobacco leaf, and the roots of tobacco were more sensitive to Cd toxicity reaction than the tobacco leaves. The content and accumulation of Cd were significant differences in different flue-cured tobacco cultivars. The leaf Cd content of Zhongyan100, Cuibi1, Yunyan87 was comparably low, and the Zhongyan100, Hongda and NC89 were less sensitive to the chang of Cd in soil.