Studies on the Relationship among Cadmium Absorption, Translocation and Tolerance in Rice
[Objective] The research aimed to confirm the relationship between the tolerance of rice cultivars to cadmium (Cd) and its distribution in vivo. [Method] The absorption, translocation and tolerance characteristics of 10 rice cultivars in Jiangsu province to Cd were compared by using solution culture method. [Result] The tolerance and distribution in vivo had significant difference among different rice cultivars. The growth of the aboveground parts in Teyou 559 was greatly inhibited by Cd, but Zhendao 8 was not affected by Cd treatment. The ratio of Cd concn. in the aboveground oart and underground part of Yangfujing 7 was highest, while the S/R value of Kyou-818 was lowest. There was no direct relationship among the absorption, translocation and the tolerance of rice. The clustering analysis was made according to the tolerance index of rice to Cd and the ratio of shoot to root, 10 rice cultivars were classified into 4 groups. In the first group, there was avariety with high translocation and weak tolerance (Yangfujing 7,Teyou-559) .In the second group, there were varieties with less translocation and weaker tolerance (Liangyoupeijiu, Suyou 22). In the third group, there were varieties with little translocation and stronger tolerance (Ⅱyou 838,K you 818, Wuyunjing-7). In the fourth group, there were varieties with more translocation and strong tolerance (Ningjing 1, Zhendao 8,86you-8). [ Conclusion ] The research provided basis for screening the rice varieties with both low Cd content and high Cd tolerance.
国家科技期刊平台
NSTL
万方数据
维普
