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当前位置: 首页 > 文章 > 水蓼、小飞蓬、杠板归和美洲商陆对锰毒的生理响应 水土保持学报 2007,21 (3) 81-85
Position: Home > Articles > Physiological Response of Polygonum hydropiper,Comnyza canadensis,Polygonum perfoliatum and Phytolacca americana to Manganese Toxicity Journal of Soil and Water Conservation 2007,21 (3) 81-85

水蓼、小飞蓬、杠板归和美洲商陆对锰毒的生理响应

作  者：
任立民;刘鹏;蔡妙珍;徐根娣;方旭燕;程正新
单  位：
广西大学农学院;浙江师范大学植物学实验室
关键词：
水蓼;小飞蓬;杠板归;美洲商陆;锰毒
摘  要：
采用水培试验,研究了不同的锰营养水平下,水蓼、小飞蓬、杠板归和美洲商陆的生理响应,通过丙二醛含量(M DA)、质膜透性(M P)、根系活力(RA)、可溶性糖含量(SS)、叶绿素含量、可溶性蛋白质含量等指标的分析比较,来揭示它们的耐锰性差异。结果表明,锰对4种植物的生理特性都有明显的影响。在高浓度锰处理下(16000μm ol/L),4种植物的质膜透性极显著升高(p<0.01),根系活力明显降低(p<0.05),地上部锰含量极显著增加(p<0.01),除美洲商陆外的其他3种植物的丙二醛含量明显上升(p<0.05),其中小飞蓬的变化幅度最大,美洲商陆的变化幅度最小。水蓼、杠板归、美洲商陆的可溶性糖及叶绿素总量维持在一定水平,与对照相比无极显著差异(p>0.01)。植物通过维持较低的质膜透性和丙二醛含量、较高的根系活力、稳定的可溶性糖及叶绿素含量来增强耐锰性,研究发现,美洲商陆的耐锰性最强,水蓼和杠板归的耐锰性较强,小飞蓬的耐锰性最差,并且发现水蓼和杠板归均已达到锰超富集植物的标准。
译  名：
Physiological Response of Polygonum hydropiper,Comnyza canadensis,Polygonum perfoliatum and Phytolacca americana to Manganese Toxicity
作  者：
REN Li-min1,2,LIU Peng1,,CAI Miao-zheng1,XU Gen-di1,FANG Xu-yan1,CHENG Zheng-xin2(1.Key Laboratory of Botany,Zhejiang Normal University,Jinhua 321004; 2.College of Agronomy,Guangxi University,Nanning 530005)
关键词：
Polygonum hydropiper;Conyza canadensis;Polygonum perfoliatum;Phytolacca americana;manganese toxicity
摘  要：
Four herbaceous plants,Conyza canadensis,Polygonum hydropiper,Polygonum perfoliatum and Phytolacca americana response differently to a wide range of Mn2+ treatments(control,2 000,4 000,8 000,16 000 μmol/L),suggesting that the degree of tolerance or toxicity varies widely in different species.The objectives of this study were first to determine whether there were differences in the physiological responses among the four herbaceous plants based on the malondialdehyde(MDA),membrane permeability(MP),root activity(RA),soluble sugar(SS),chlorophyll and soluble protein contents and second to assess whether there were some correlation between these indexes and Mn overground tissue concentrations.The results indicated that there were some correlation between the physiochemical values and Mn concentrations in plants' overground tissues due to increasing Mn2+ supply.According to the hydroponic culture experiments,16 000 μmol/L Mn2+ significantly(P<0.05) promoted the contents of MDA(Phytolacca americana was exceptive),MP and the overground Mn content when compared to the control respectively and these indexes in Polygonum hydropiper increased most while Phytolacca americana rose less.Meanwhile,the soluble sugar(SS),as well as the contents of chlorophyll nearly maintained the same level as each control in Conyza canadensis,Polygonum perfoliatum and Phytolacca americana in comparison with Polygonum hydropiper,whereas,the content of soluble protein didn't show the obvious tendency.The results also implied that Conyza canadensis,Polygonum perfoliatum and Phytolacca americana could enhance the tolerance to Mn stress under high treatments by maintaining lower contents of MDA and MP,higher root activity(RA),steady contents of SS and chlorophyll and the three herbaceous plants,which were satisfied with the standard of Mn phytoaccumulators can be expected during the phytoremediation application.

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