不同水稻品种对五氯酚钠的吸收累积特征  

Uptake and Accumulation Characteristics of Sodium Pentachlorophenate(PCP-Na)in Different Rice Varieties

作　　者：武桄旗 苏傲雪 李学宁 谢广雪 宋欣录 徐艳 WU Guangqi;SU Aoxue;LI Xuening;XIE Guangxue;SONG Xinu;XU Yan(School of Environmental Science and Engineering,Qingdao University,Qingdao,Shandong 266071,China)

机构地区：[1]青岛大学环境科学与工程学院,山东青岛266071

出　　处：《土壤》2024年第2期382-387,共6页Soils

基　　金：国家自然科学基金面上项目(42177028);山东省高等学校青创人才引育计划(DC2000000961)资助。

摘　　要：本文采用温室水培试验,研究了15种水稻品种对五氯酚钠(PCP-Na)的吸收差异,进而明确水稻对其体内PCP-Na的代谢能力。结果表明,水培浓度显著影响水稻对PCP-Na的吸收行为,且在胁迫的1~2 d内水稻根部的PCP-Na累积浓度达到最大值。粳稻、籼稻、杂交稻品种的根部累积浓度分别为399.47~603.39、198.67~315.05、186.16~271.17 mg/kg;茎叶累积浓度分别为6.32~10.80、2.09~8.28、2.53~3.19 mg/kg。扬粳687号(粳稻)、农香24号(籼稻)、泰两优217号(杂交稻)是PCP-Na耐受性最强的三大水稻品种。研究还发现,水稻本体对PCP-Na具有较强的降解能力,水稻根部的PCP-Na在14 d内从355.21 mg/kg下降至2.59 mg/kg,茎叶内的PCP-Na在11 d内从14.55 mg/kg下降至0.098 mg/kg。本研究有助于理解水稻对PCP-Na的吸收累积特征和降解能力,同时对水稻的安全生产和耐性育种提供一定的依据。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.

关 键 词：五氯酚钠 植物吸收迁移 水稻品种 氯代有机污染物 植物代谢 

分 类 号：X173[环境科学与工程—环境科学]