【摘要】 园林水体由于受到金属或有机物污染,水质逐渐恶化.文章探讨了沟渠中常见植物石龙芮(Ranunculus scelera-tus L.)对Fe2+的富集和净化及植体内叶绿素含量、过氧化氢酶活性(CAT)和质膜透性的变化.结果表明,石龙芮在含低浓度Fe2+时,叶绿素含量和CAT活性增加,质膜透性未发生显著的变化,含低浓度Fe2+对植物的生长有利;随石龙芮对Fe2+富集量的增加,在表现出较强的富集能力的同时,由于植体内自由基含量的增加导致CAT活性下降和质膜透性增大,植体受一定的胁迫伤害。更多还原

【Abstract】 To explore the purification and enrichment of Ranunculus sceleratus L.on Fe2+contaminated water,the dynamics of chlorophyll content,CAT activities and membrane permeability in the process of purification were investigated.The results showed that under the condition of lower Fe2+contaminated water,the chlorophyll content and CAT activities of R.sceleratus increased,and no significantly change in membrane permeability.As the accumulation of the Fe2+,however,membrane permeability increased,while CAT activities decreased due to the increase of free radical.As a result,the individuals of R.sceleratus were damaged by Fe2+stress even if they are capable of enrichment on Fe2+.更多还原