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| 异质Cd胁迫对蚕豆和富集植物续断菊根系生长的影响 |
| Effects of heterogeneous Cd stress on root growth of Vicia faba and Sonchus asper |
| 投稿时间：2017-12-08 |
| DOI：10.13254/j.jare.2017.0313 |
| 中文关键词: 蚕豆，续断菊，Cd胁迫，根长，根表面积，根体积 |
| 英文关键词: Vicia faba, Sonchus asper, heterogeneous Cd stress, root length, root surface area, root volume |
| 基金项目:国家重点研发项目（2018YFC1802603）；云南省科技计划项目（2017FD078，2018BB017）；云南省科技创新团队计划项目（2017HC015）；国家污染耕地修复示范项目（YNBY2016-002） |
| 作者 | 单位 | E-mail | | 李博 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 袁兴超 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 湛方栋 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 尹晓青 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 蒋明 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 秦丽 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 祖艳群 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | | | 李元 | 云南农业大学资源与环境学院, 昆明 650201
云南省农业环境污染控制与生态修复工程实验室, 云南农业大学, 昆明 650201 | liyuan@ynau.edu.cn |
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| 中文摘要: |
| 为了研究蚕豆和续断菊根系对异质Cd胁迫的生态学响应，探讨间作体系影响Cd累积的根系可塑性机理，以蚕豆和Cd富集植物续断菊为试验材料，设置异质Cd胁迫根箱模拟试验，将根箱平均分为左、右两室，分别填充Cd处理（50 mg·kg-1）土壤和无Cd土壤，分别测定蚕豆和续断菊的根长、根表面积、根体积等形态指标，比较异质Cd胁迫对蚕豆和续断菊根系生长影响的差异。结果表明，异质Cd胁迫下，蚕豆的根长、根表面积、根体积表现为无Cd右室大于Cd胁迫左室，续断菊表现为Cd胁迫左室大于无Cd右室。蚕豆根系直径为0~0.5 mm、土壤深度为15~20 cm时，无Cd右室根长、根表面积和根体积是Cd胁迫左室的4.63、3.14倍和2.39倍；根系直径为0.5~1 mm和大于1 mm、土壤深度为30~35 cm时，无Cd右室根长分别是Cd胁迫左室的1.69倍和5.04倍，根表面积分别是Cd胁迫左室的1.78倍和5.05倍，根体积分别是Cd胁迫左室的1.85倍和33.00倍。续断菊根系直径为0~0.5 mm、土壤深度为0~5 cm时，Cd胁迫左室根长、根表面积和根体积是无Cd右室的1.66、1.36倍和1.57倍；根系直径为0.5~1 mm、土壤深度为35~40 cm时，Cd胁迫左室根长、根表面积和根体积是无Cd右室的2.86、2.16倍和2.81倍；根系直径大于1 mm、土壤深度为15~20 cm时，Cd胁迫左室根长、根表面积和根体积是无Cd右室的26.94、52.26倍和139.33倍。综上结果表明Cd胁迫抑制了蚕豆根系的生长，促进了续断菊根系的生长，这可能是蚕豆和续断菊间作模式修复Cd污染土壤的机理之一。 |
| 英文摘要: |
| A controlled glasshouse experiment was conducted to explore the effects of heterogeneous Cd stress on root growth of Vicia faba and Sonchus asper. The root length, root surface area and root volume were examined. The results showed that the root length, root surface area and root volume of Vicia faba was greater increase in no Cd patches than in the Cd stress patches. The root length, root surface area and root volume of Sonchus asper was greater increase in Cd stress patches than in no Cd patches. When the root diameter of Vicia faba was 0~0.5 mm and the soil depth was 15~20 cm, the root length, root surface area and root volume in no Cd patches were 4.63, 3.14 times and 2.39 times that in the Cd stress patches; Root diameter for 0.5~1 mm and greater than 1 mm, soil depth of 30~35 cm, root length in no Cd patches were 1.69 times and 5.04 times that in the Cd stress patches, root surface area in no Cd patches were 1.78 times and 5.05 times that in the Cd stress patches, root volume in no Cd patches were 1.85 times and 33 times that in the Cd stress patches. When the root diameter of Sonchus asper was 0~0.5mm and the soil depth was 0~5 cm, the root length, root surface area and root volume in the Cd stress patches were 1.66, 1.36 times and 1.57 times that in no Cd patches; Root diameter for 0.5~1 mm, soil depth of 35~40 cm, the root length, root surface area and root volume in the Cd stress patches were 2.86, 2.16 times and 2.81 times that in no Cd patches; Root diameter for greater than 1 mm, soil depth of 15~20 cm, the root length, root surface area and root volume in the Cd stress patches were 26.94, 52.26 times and 139.33 times that in no Cd patches. The root growth of Vicia faba was alleviated, and the root growth of Sonchus asper was promoted under Cd stress. |
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