文章摘要
陈辰,朱园辰,喇乐鹏,张思佳,丁工尧,闫雷.典型黑土环境下的高、低镉积累白菜品种筛选及耐性比较[J].农业环境科学学报,2020,39(3):462-472.
典型黑土环境下的高、低镉积累白菜品种筛选及耐性比较
Screening and tolerance comparison of high and low cadmium accumulating cabbage cultivars in a typical black soil
投稿时间:2019-09-26  
DOI:10.11654/jaes.2019-1069
中文关键词: 黑土    高积累品种  低积累品种  白菜  镉耐受力
英文关键词: black soil  cadmium(Cd)  high-accumulation cultivar  low-accumulation cultivar  cabbage  Cd tolerance
基金项目:国家重点基础研究发展计划课题(973计划)(2017YFD0801104-4)
作者单位E-mail
陈辰 东北农业大学资源与环境学院, 哈尔滨 150030  
朱园辰 东北农业大学资源与环境学院, 哈尔滨 150030  
喇乐鹏 东北农业大学资源与环境学院, 哈尔滨 150030  
张思佳 东北农业大学资源与环境学院, 哈尔滨 150030  
丁工尧 东北农业大学资源与环境学院, 哈尔滨 150030  
闫雷 东北农业大学资源与环境学院, 哈尔滨 150030 1071913992@qq.com 
摘要点击次数: 2178
全文下载次数: 1651
中文摘要:
      为探究不同白菜(Brassica pekinensis L.)品种在典型黑土环境中的镉敏感程度和镉积累特性,筛选出具备高镉、低镉积累特征的耐镉品种。试验以东北地区20种主栽白菜品种为材料进行盆栽模拟试验,研究基于不同白菜品种镉胁迫下的剂量-效应、镉积累特征,对得到的高、低镉积累品种的浓度积累效应及氧化损伤程度进行评估。结果显示:供试品种间剂量-效应差异明显,JF和BCCRQJ为镉耐性最强两个品种,耐受阈值分别为1.204 mg·kg-1和1.036 mg·kg-1。高镉浓度下(≥ 0.6 mg·kg-1)JF叶镉含量最低,根向叶迁移系数(TF)、叶富集系数(BCF)均小于1;BCCRQJ净化率最高。土壤镉含量与两者根、叶积累量、过氧化氢(H2O2)、超氧阴离子(O2-)、丙二醛(MDA)、游离脯氨酸(FPRO)均呈正相关,与净化率呈负相关(P<0.05),此外高浓度下BCCRQJ氧化损伤程度较JF更高。综合试验结果表明,JF是镉耐性极高的低积累品种,而BCCRQJ为镉耐受力略逊于JF的高积累品种。
英文摘要:
      To investigate cadmium(Cd)sensitivity and Cd accumulation characteristics of different cabbage(Brassica pekinensis L.)cultivars in a typical black soil environment, Cd-tolerant cultivars characteristics of high and low Cd accumulation were selected. In this study, pot experiments were conducted on 20 common cabbage cultivars from Northeast China to study the dose-effect and Cd accumulation characteristics of different cabbage cultivars under Cd stress. In addition, the effects of Cd concentration and oxidative damage on cultivars with high and low Cd accumulation were assessed. The results showed that the dose-effect differences among the tested cultivars were significant. JF and BCCRQJ were the two cultivars with the strongest Cd tolerance, with tolerance thresholds of 1.204 mg·kg-1 and 1.036 mg·kg-1, respectively. At high Cd concentrations(≥ 0.6 mg·kg-1), the Cd content in the leaves of JF was the lowest, with root-to-leaf translocation factor(TF)and bioconcentration factor(BCF)of less than 1. Meanwhile, BCCRQJ had the highest extraction rate. The Cd content in the soil was positively correlated with root and leaf accumulation of Cd, and hydrogen peroxide(H2O2), superoxide anion (O2-), malondialdehyde(MDA), and free proline(FPRO)levels in JF and BCCRQJ, and it was negatively correlated with the extraction rate(P<0.05)of the two cultivars. Moreover, the degree of oxidative damage in BCCRQJ was higher than that in JF at high Cd concentrations. In conclusion, JF is a low-accumulation cultivar with extremely high Cd tolerance, while BCCRQJ is a high-accumulation cultivar with slightly lower Cd tolerance than that of JF.
HTML    查看全文   查看/发表评论  下载PDF阅读器