镉胁迫下猕猴桃对镉的吸收及转运
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湖南省财政厅项目(湘财农指2015167)


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    摘要:

    在对湖南省猕猴桃成年果园8个猕猴桃品种(金魁、金艳、翠玉、东红、红阳、丰悦、魁蜜、米良一号)镉含量调查分析的基础上,选取镉富集能力有差异的米良一号与金艳猕猴桃进行镉胁迫(5、10、15、20 mg/kg)下对镉的吸收、转运的差异研究。结果表明:成年果园8个猕猴桃品种在土壤中度镉污染(0.9 mg/kg)时,果实镉含量均未超过国家标准值(0.05 mg/kg);猕猴桃果实成熟期镉含量最高;镉胁迫下,米良一号和金艳镉含量随镉处理浓度增大而上升,且在镉浓度较低情况下富集能力较强;根的镉分配系数最大(>0.90),果实的最小,说明猕猴桃主要由根部吸收累积镉;米良一号整株吸收和积累镉量显著高于金艳,但金艳对镉的转移能力强于米良一号,金艳果实镉含量高于米良一号。

    Abstract:

    Based on the investigation and analysis of the cadmium content in 8 kiwifruit varieties(Jinkui, Jinyan, Cuiyu, Donghong, Hongyang, Fengyue, Kuimi, Miliang No. 1) in partial adult kiwifruit orchards in Hunan Province, Miliang No.1 and Jinyan Kiwifruit with different cadmium enrichment capacity were selected to study the difference in cadmium absorption and transportation under cadmium stress(5, 10, 15, 20 mg/kg). The results showed that the cadmium content of the eight kiwifruit varieties in the adult orchard did not exceed the national standard value(0.05 mg/kg) when the soil was polluted by moderate cadmium(0.9 mg/kg). The cadmium content of kiwi fruit is the highest in ripening period. Under cadmium stress, the cadmium content in the organs of Miliang No. 1 and Jinyan increased with the increase of cadmium treatment concentration, and the enrichment ability was stronger when the cadmium concentration was lower. The cadmium distribution coefficient in the root is the largest(>0.90) and the fruit is the smallest. indicating kiwifruit mainly absorbs and accumulates cadmium from the root. The absorption and accumulation of cadmium in the whole plant of Miliang No. 1 were significantly higher than that in the whole plant of Jinyan, but the transfer ability of cadmium of Jinyan is stronger than that of Miliang No. 1 and the cadmium content of Jinyan fruit is significantly higher than that of Miliang No. 1.

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王思元,王仁才,石浩,王芳芳,韩宁.镉胁迫下猕猴桃对镉的吸收及转运[J].湖南农业大学学报:自然科学版,2020,46(6):.

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  • 在线发布日期: 2020-12-23
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