CAJ | 학술논문

采用水培法和化学逐步提取法,研究水生植物凤眼莲（Eichhornia crassipes）根和叶Cu2＋的累积及其提取形态.结果表明,凤眼莲中Cu2＋的累积模式表现为根〉叶,凤眼莲根是Cu2＋主要的吸收和累积部位,具有强的吸收和累积水体环境Cu2＋的能力,并且根和叶对Cu2＋的累积量随培养液中Cu2＋浓度的增加和处理时间的延长而上升;Cu2＋在凤眼莲组织中的提取态总体表现一致为：盐酸提取态〉乙醇提取态〉醋酸提取态〉水提取态〉氯化钠提取态,盐酸提取态占优势分布,稳定且毒性低的草酸铜可能是Cu2＋在凤眼莲体内的主要存在形式.盐酸提取态Cu比例的下降和乙醇提取态Cu比例的上升是凤眼莲富集器官根对Cu2＋污染在提取态上的响应特征之一.
채용수배법화화학축보제취법,연구수생식물봉안련（Eichhornia crassipes）근화협Cu2＋적루적급기제취형태.결과표명,봉안련중Cu2＋적루적모식표현위근〉협,봉안련근시Cu2＋주요적흡수화루적부위,구유강적흡수화루적수체배경Cu2＋적능력,병차근화협대Cu2＋적루적량수배양액중Cu2＋농도적증가화처리시간적연장이상승;Cu2＋재봉안련조직중적제취태총체표현일치위：염산제취태〉을순제취태〉작산제취태〉수제취태〉록화납제취태,염산제취태점우세분포,은정차독성저적초산동가능시Cu2＋재봉안련체내적주요존재형식.염산제취태Cu비례적하강화을순제취태Cu비례적상승시봉안련부집기관근대Cu2＋오염재제취태상적향응특정지일.
A hydroponics experiment combined with sequential extraction method was conducted to determine the Cu2＋ concentration and Cu2＋ extractable forms in different parts of Eichhornia cras- sipes.The results showed that the accumulation patterns of Cu2＋ in Eichhornia crassipes were root〉 leaf,suggesting that Cu2＋ accumulates mainly in the root of Eichhornia crassipes and the root had the ability to uptake and accumulate large amount of Cu2＋.Cu2＋ accumulations in both the roots and the leaves of Eichhornia crassipes increased with the increasing concentration of Cu2＋ in the medium and the duration of the experiment. HC1 extractable Cu2＋ occupied the greatest proportion, followed by ethanol-extractable Cu2＋ , HAc-extractable Cu2＋ , H2 O-extractable Cu2＋ , and NaCl-extractable Cu2＋ ,which indicated that Cu2＋ was forming stable and low toxicity copper complexed with oxalic acid in leaves and roots. Each Cu chemical form in Eichhornia crassipes roots increased with Cu2＋ concentration in the treatment.The measured decrease in the HC1 extractable Cu and increase in the ethanol-extractable Cu among all extractable hornia crassipes root to Cu pollution. forms is attributed to the response mechanisms of Eich