摘要
以八宝景天和三七景天为试材,采用盆栽方法研究了重金属镉(Cd)对这2种植物生长的影响(植株生物量、植物株高、叶片数、开花数量)和在这2种景天植物不同器官的吸收与积累。结果表明:虽然重金属Cd对八宝景天和三七景天有毒害作用,主要表现在株高下降、根系变短、变细、叶片数减少及变色、生物量降低等,但随土壤中Cd浓度增加,这2种景天各器官内Cd含量均分别显著提高,不同器官Cd浓度从高到低的顺序为:叶片>茎>花序>根系,并且地上部Cd积累量大于地下部,说明这2种景天都有较强的转运能力,具有植物修复的潜力。研究结果对景天科植物在北方地区重金属Cd植物修复中的应用有重要意义。
Taking Sedum spectabile and Sedum spetabilis planted in pots with cadmium as materials, the absorb and accumulation of Cd in different organs of these two Sedum and the effects of Cd on biomass, height, quantity of leaves and flowers were studied. The results showed that Cd had toxic effect on these two Sedum, decreased plant height, shorter and thinner roots, reduced leaf number, changed leave color, and decreased biomass. With the increase of Cd concentration,Cd content in the organs of both Sedum sp. significantly improved. Cd concentration in different organs from high to low was leaf〉stem〉inflorescence〉root. Cd accumulation above ground was greater than under ground, which indicated that these two Sedum sp. had strong transport capacity, and had the potential for phytoremediation. The results had important significance for the application of Crassulaceae plants in Cd phytoremediation in the northern area.
出处
《北方园艺》
CAS
北大核心
2016年第7期60-65,共6页
Northern Horticulture
基金
内蒙古自然科学基金资助项目(2013MS0309
2015MS0301)
