Uptake and Accumulation Characteristics of Sodium Pentachlorophenate(PCP-Na)in Different Rice Varieties
In this study,the uptake differences of PCP-Na in 15 rice varieties was investigated by greenhouse hydroponics experiment,and then the metabolic ability of rice to PCP-Na was clarified.The results showed that hydroponic concentration significantly affected the uptake behavior of rice to PCP-Na,and the maximum concentration of PCP-Na absorbed by roots was reached at 1-2 days incubation.The cumulative concentration in roots of Japonica,Indica and hybrid rice varieties were 399.47-603.39,198.67-315.05,186.16-271.17 mg/kg,and 6.32-10.80,2.09-8.28 and 2.53-3.19 mg/kg in stems and leaves,respectively.Yangjing 687(Japonica),Nongxiang 24(Indica),and Tailiangyou 217(hybrid)were the three most tolerant rice varieties to PCP-Na.Rice ontogeny had a strong metabolic capacity for PCP-Na,which decreased from 355.21 to 2.59 mg/kg in 14 days in roots and from 14.55 to 0.098 mg/kg in 11 days in stems and leaves.This study contributes understand the uptake and accumulation characteristics and degradation capacity of PCP-Na in rice,and provide some basis for safe production and tolerance breeding of rice.
Sodium pentachlorophenatePlant uptake and translocationRice varietiesChlorinated organic pollutantPlant metabolism
万方数据
维普
