微囊藻毒素-LR和铜绿微囊藻裂解液对营养生长期水稻生理生化效应

发布时间：2018-01-11 23:19

本文关键词：微囊藻毒素-LR和铜绿微囊藻裂解液对营养生长期水稻生理生化效应　出处：《中国环境科学》2017年08期 　论文类型：期刊论文

【摘要】：选用微囊藻毒素-LR(MC-LR)纯品和铜绿微囊藻裂解液分别对水稻进行21d暴露处理,考察不同浓度(0.1,1.0和10.0μg/L)MC-LR纯品和不同浓度(0.002,0.02和0.2倍)裂解液对水稻株高、鲜重、根长、淀粉酶、碱性磷酸酶(AKP)、还原性谷光甘肽(GSH)和丙二醛(MDA)的影响.研究结果表明,MC-LR纯品能抑制水稻株高、根长及叶片中淀粉酶活性,且在较低浓度下水稻根长即出现显著响应.高浓度裂解液在水稻的生长发育方面更多地表现为对植株的刺激和促进作用,仅对水稻根长抑制显著.在生理生化方面,MC-LR纯品对叶片碱性磷酸酶活性无影响,但对GSH具有诱导作用,而裂解液对GSH、MDA和AKP都表现出显著抑制.该研究表明,MC-LR纯品和铜绿微囊藻裂解液对水稻的毒性效应存在差异,铜绿微囊藻裂解液中存在的其他毒素组分可能对水稻毒性效应影响较大.
[Abstract]:The rice was exposed to microcystin-LRN MC-LR and microcystis aeruginosa lytic solution for 21 days, respectively. 1.0 and 10.0 渭 g / L MC-LR purity and 0.002 / L 0.02 and 0.2 times of different concentrations) the lytic solution had high plant height, fresh weight, long root length and amylase on rice plants. The effects of alkaline phosphatase (AKP), reductive glutathione (GSH) and malondialdehyde (MDA) on the activity of amylase in rice were studied. The results showed that MC-LR could inhibit plant height, root length and amylase activity in leaves of rice. The root length of rice at lower concentration showed a significant response, and the high concentration of lytic solution was more likely to stimulate and promote the growth and development of rice. In physiological and biochemical aspects, MC-LR had no effect on alkaline phosphatase activity in leaves, but it could induce GSH, while lysate could induce GSH. Both MDA and AKP showed significant inhibition. This study showed that the toxicity of MC-LR and microcystis aeruginosa lytic liquid to rice was different. Other toxic components in microcystis aeruginosa lysate may have a great effect on rice toxicity.
【作者单位】：国家环境保护农药环境评价与污染控制重点实验室环境保护部南京环境科学研究所;南京工业大学环境学院;
【基金】：国家自然科学基金青年基金(21407056);国家自然科学基金专项(31340017)
【分类号】：S511;X52
【正文快照】： 蓝藻广泛分布于淡水和咸水水体中,在水体富营养化的情况下,蓝藻会过度繁殖造成水体透明度降低、溶解氧减少,其中微囊藻、鱼腥藻和念珠藻等会产生微囊藻毒素、鱼腥藻毒素、节球藻毒素等多种毒素[1].最常见的微囊藻毒素(Microcystins,简称MCs)是一类结构为环状七肽的小分子肝毒

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