高氯酸盐与铅复合污染对8种空心菜幼苗生长的影响

张茹; 陈桂葵; 黎华寿; 贺鸿志; 张泽民

文章摘要

张茹,陈桂葵,黎华寿,贺鸿志,张泽民.高氯酸盐与铅复合污染对8种空心菜幼苗生长的影响[J].农业环境科学学报,2015,34(3):415-423.

高氯酸盐与铅复合污染对8种空心菜幼苗生长的影响

Combined Effects of Perchlorate and Lead on Seedling Growth of Eight Ipomoea aquatica Forsskal Varieties

投稿时间：2014-09-28

DOI：10.11654/jaes.2015.03.002

中文关键词: 高氯酸盐铅复合污染空心菜交互作用

英文关键词: perchlorate lead combined pollution Ipomoea aquatica Forsskal interaction

基金项目:863项目(2013AA102402)

作者	单位	E-mail
张茹	华南农业大学农学院, 广州 510642 华南农业大学农业部华南热带农业环境重点实验室, 广州 510642
陈桂葵	华南农业大学农学院, 广州 510642 华南农业大学农业部华南热带农业环境重点实验室, 广州 510642	guikuichen@scau.edu.cn
黎华寿	华南农业大学农学院, 广州 510642 华南农业大学农业部华南热带农业环境重点实验室, 广州 510642
贺鸿志	华南农业大学农学院, 广州 510642 华南农业大学农业部华南热带农业环境重点实验室, 广州 510642
张泽民	华南农业大学农学院, 广州 510642	zmzhang@scau.edu.cn

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中文摘要:

通过室内滤纸法试验研究发现,ClO₄^-、Pb及其复合污染对8个品种空心菜(Ipomoea aquatica Forsskal)幼苗根长、芽长以及鲜重的影响总体呈现出低浓度促进、高浓度抑制的规律,对空心菜幼苗根部的抑制效果最为明显,其中泰国空心菜和香港纯白大叶空心菜在ClO₄^-和Pb复合污染下的根长分别仅为对照组的31.66%和38.64%。ClO₄^-和Pb复合污染对空心菜的抑制效果因空心菜品种、污染物的类型、浓度及其组合的不同而不同,且呈现出复杂的交互作用,多数空心菜品种在低浓度(1 mg·L^-1的ClO₄^-+5 mg·L^-1的Pb)和中浓度(20 mg·L^-1的ClO₄^-+50 mg·L^-1的Pb)的复合条件下的交互作用类型表现为协同作用,而在高浓度(200 mg·L^-1的ClO₄^-+500 mg·L^-1的Pb)的复合条件下则主要表现为拮抗作用。空心菜对ClO₄^-、Pb及其复合污染的耐性都存在明显的品种差异,其中耐性较强的品种是泰国柳叶空心菜、港种青绿梗竹叶空心菜和金龙白骨柳叶空心菜,耐性较差的品种是泰国空心菜和香港纯白大叶空心菜。

英文摘要:

Perchloratte(ClO₄^-) and lead(Pb) are both inorganic contaminants in soils. However, their interactive effects on plants have not been well investigated. Here the root length, shoot length and biomass of 8 Ipomoea aquatica Forsskal varieties were examined under different rates of ClO₄^- and Pb and their combinations. Results showed that increasing ClO₄^-, Pb, and ClO₄^- +Pb concentrations increased inhibitory effects on the root length, shoot length and fresh weight of I. aquatica seedlings, with the most obvious inhibition found in the root length, in which a significant dose-effect relationship(P<0.05) was present. Different varieties of I. aquatica responded differently to ClO₄^- and Pb. The root lengths of Thailand and wide-leaf white skin(Hong Kong) I. aquatica were only 31.66% and 38.64% of that of the controls. The interaction of ClO₄^- and Pb showed synergism for most varieties of I. aquatica at low concentrations, but antagonism at higher concentrations. The narrow-leaf(Thailand), narrow-leaf green-skin(Hong Kong) and narrow-leaf white-skin I. aquatica were relatively tolerant to, whereas the Thailand and wide-leaf white-skin(Hong Kong) varieties were susceptible to perchlorate and lead stresses.

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