期刊论文

Biological Mechanisms of Using Pogonatum Inflexum to Monitor Soil Cd Pollution

中文

土壤学报

0564-3929

2017

54

1

128-137

10.11766/trxb201604180090

湖南省自然科学基金项目（2016JJ4015,2015JJ4012）； 湖南省科技计划重点项目（2010SK2004）资助~~；

本校为第一机构

采用对镉具有高敏感性特征的苔藓植物——东亚金发藓（Pogonatum inflexum）为材料，以不同浓度梯度镉污染基质作为胁迫条件，观测该植物在镉胁迫下的生长发育状况、镉富集能力、叶绿素含量、可溶性蛋白含量及MDA含量，并分析比较了各项指标变化特征与土壤中全镉含量及有效镉含量的相关性。结果显示，供试土壤中有效镉含量约占全镉含量的20%～40%，东亚金发藓对镉的富集能力总体较弱，其最大富集浓度值为1.627 mg kg-1，最高富集系数为63.9%，植株富集浓度与土壤有效镉含量之间的相关性高于全镉；东亚金发藓对镉污染表现出显著反应特征，植株孢子体和配子体受害症状明显，1～2 mg kg-1以上的镉胁...

【Objective】 How to monitor and assess soil Cd pollution and bioavailability is currently an issue of great concern. However, measurements of soil available Cd contents using the conventional chemical methods may only serve as certain reference, because they are not good enough to intuitively and truly reflect the damages soil Cd~(2+) does to plants. Bryophyta are simple in structure, free of any cuticle on their surface and quite sensitive to pollutants, so they are usually used in monitoring environmental pollution. In this paper, an effecti...