期刊论文

Tolerance,accumulation,translocation and stress response of Salix matsudana Koidz to lead

Wang, P.

中文

环境科学学报

0253-2468

2016

36

10

3876-3886

10.13671/j.hjkxxb.2016.0120

(No.2015SK20043):湖南省重点研发计划项目 (No.15K147.13K070):湖南省高校创新平台开放基金项目 (No.0369):中南林业科技大学引进***人才科研启动基金项目 (No.2310006):湖南省环境科学重点学科建设基金项目 (No.2015SK20043),the University Innovation Platform Open Foundation of Hunan Province(No.15K147.13K070):Supported by the Key Research and Development Plan of Hunan Province

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耐性机理的系统解析对于旱柳在土壤Pb污染控制上的应用具有重要意义.为了明确旱柳对Pb的耐性机理,通过盆栽试验研究了旱柳对Pb的耐性、富集、转运特征,采用STEM、EDAX、FTIR分析了旱柳对Pb的胁迫响应机制.结果表明:低含量(≤ 600 mg·kg~(-1)) Pb对旱柳生长有促进作用,高含量(≥ 1000 mg·kg~(-1)) Pb明显抑制旱柳的生长;旱柳对Pb具有很高的耐性,耐性指数TI(%)可达108.32,属Pb高耐性植物;旱柳对Pb的富集能力较强,富集系数均值可达7.5773,而对Pb的转运能力较弱,转运系数均小于1;低含量Pb胁迫不影响叶绿素的合成,也不会促生丙二醛(MDA),而高含量Pb胁迫明显抑制叶绿素的合成,促使MDA大量生成,导致严...

Systematic analysis of tolerance mechanism is of high significance for application of Salix matsudana Koidz in lead pollution control in soil. The tolerance, accumulation and translocation characteristics of Salix matsudana Koidz to lead was investigated by a pot test, and the stress response mechanism of Salix matsudana Koidz to lead was analyzed by using STEM, EDAX and FTIR. The obtained results showed that Pb of low content (≤ 600 mg·kg-1) promoted Salix matsudana Koidz growth, but Pb of high content (≥ 1000 mg·kg-1) significantly restri...