铅胁迫对灌木柳树生长的影响

Influence of lead stress treatment on the growth of bush willow clones

采用水培法研究了4个灌木柳无性系在不同浓度（100μM、300μM、600μM）铅胁迫下的生长表现及其耐受性。结果表明：柳树无性系的存活率与生长量在不同无性系和不同铅胁迫浓度间均存在显著差异；不同浓度的铅胁迫均抑制了灌木柳无性系的生长，其存活率与生长量的排序均为CK〉100μM〉300μM〉600μM；在100—600μM铅胁迫下，存活率和萌枝数排序均为银柳P102〉欧洲红皮柳P665〉蒿柳P683〉细柱柳P642，株高和生物量排序均为银柳P102〉蒿柳P683〉欧洲红皮柳P665〉细柱柳P642，生物量分配排序为银柳P102〉欧洲红皮柳P665〉细柱柳P642〉蒿柳P683。银柳P102在3种铅胁迫浓度下耐性指数均为最高。

we examined the growth traits and tolerance index of four bush willow clones on different concentrations （100 μM, 300 μM, 600 μM） of lead stress using hydroponic culture. The results showed that there were significant differ- ence on the survival rate and growth characteristics among different clones or lead content. The growth of the clones were inhibited by the lead stress of different concentrations, the survival rate and growth traits were in order of CK 〉 100μM 〉 300 μM 〉 600 μM. Under 100 μM -600 μM lead concentrations, the survival rate and the sprout numbers were in order of P102 〉 P665 〉 P683 〉 P642 , the stem height and the biomass were in order of P102 〉 P683 〉 P665 〉 P642, the distribution of the biomass was in order of P102 〉 P665 〉 P642 〉 P683. The P102 has the highest tolerance index under the different lead concentrations.