为寻找铅污染土壤净化和景观化的花卉植物,采用盆栽方法,研究了3种花卉对铅污染土壤的修复能力。结果表明,3种花卉中送春花(Godetia amoena)地上部吸收富集铅的量最大,积累铅能力最强,其次为勿忘我(Limonium sinuatum),马络葵(Malope trifida)吸收积累铅能力最弱。在Pb浓度为1 000 mg/kg时,3种花卉耐性均较强,可用作铅污染土壤的稳定修复植物。

In order to search flower plants which could purify and beautify Pb -contaminated environ-ment,3 kinds of flowers were screened to determine their soil remediation abilities by pot method.The results showed that Godetia amoena had the strongest capability of accumulating Pb in aerial part,followed by Limoni-um sinuatum,and Malope trifida had the weakest.When the Pb concentration was 1 000 mg/kg,3 kinds of flowers all exhibited strong endurance,which could be used for soil stabilization remediation.

异型花柱是一种受遗传控制的花柱多态现象.白花丹科Plumbaginacea被列为有异型花柱分布较多的科,对白花丹科植物花柱多态现象的研究有助于探讨异型花柱的功能和适应意义.今以白花丹科细裂补血草Limonium leptolobum为研究材料,通过对野外居群的花型、花部特征、传粉媒介、繁育系统等进行观察,发现细裂补血草野外居群主要由柱头高出雄蕊的长花柱型植株和雌雄蕊在同一位置的等高型植株及少量介于两种花型之间的不典型植株构成,其中长花柱型植株与等高型植株的数量比为1.1(1.2):1;两种花型的单花在雌雄蕊长度、柱头花粉数和自然状态的结实率显著不同,其中L型单花有着高的柱头花粉数和结实率,其它花大小参数及单花花粉数量无差异;从两种花型排列方式的不协调性和等高型花较低的结实率看,细裂补血草的这种花柱多态现象可能是异型花柱演化过程中的一个不稳定阶段,其中L型植株可能是在某种选择压力下实现的一种雌雄异位方式,而等高型植株应该是该居群的原始株型.

Heterostyle is a genetically controlled floral polymorphism. As a family with more heterostyle distribution, plumbaginace provides an ideal system in which to further explore the function and adapation of heterostyle by the study on various pattern of style polymorphism from different groups. We investigated the morph ration, floral morphology and part traits, pollinators, breeding system of L.leptolobum.the result showed that the natural populations of L. leptolobum were isoplethic, containing long-styled, isostyla morphs and a small amount of atypical plants its styles height were between long-styled and isostyla morphs, and the ratio of number between long-styled and isostyla morphs was about 1.1(1.2):1. It were significantly different between two morphs in terms of female, and stamen length, no.of pollen grains on stigma and fruit sets, with the exception of parts of floral size parameters such as corolla length, floral longitudinal length, calyx length, corolla diameter and no.of

以野生花卉二色补血草的植株和花枝为试验材料,主要对其物候期和开花指数进行了研究,以期为引种栽培和切花观赏提供理论依据。结果表明:二色补血草在秦皇岛地区生长期长,从萌发至枯萎7个月时间,花期较长,叶多为基生,根系发达,适合做地被及固土护坡植物;又因植株在6-9月开花不断且单株产量高,适宜做切花栽培,近距离运输的切花剪切选择盛开花枝,远距离运输的切花剪切选择初开花枝即可达到较高的观赏价值。

Taking the wild lfower limonium biocolor plants and the lfower branches as experiment material, we mainly studied its phenological phase and the eflforescence number index. The results show that it is an excellent ground cover plant and cut-lfower species, and the beautiful lfowers may be used for ornamental purpose;Picking the simply blossom lfower for a long way transport and picking the blooming lfower for a short way. Therefore, it should be popularized and applied in landscape architecture.