ZUO Feng-yue,HU Zong-yang,YANG Jing-hui,et al.Growth Effects of Pb on Seedling of Lactuca sativa L.and Brassica campestris L.ssp[J].Northern Horticulture,2012,36(13):12-15.
铅对油麦菜和四季菜心幼苗生长的影响
- Title:
- Growth Effects of Pb on Seedling of Lactuca sativa L.and Brassica campestris L.ssp
- 文章编号:
- 101-0009(2012)13-0012-04
- Keywords:
- Pb; leaf number; leaf area; plant hight; dry weight; fresh weight
- 分类号:
- X 503.23
- 文献标志码:
- A
- 摘要:
- 为了解铅对油麦菜和四季菜心生长的影响，通过无土栽培的方法，用不同浓度的硝酸铅溶液对2种植物的幼苗进行了胁迫处理，分析不同浓度铅处理对植物生长的影响。结果表明：铅处理不同程度的影响了2种植物的生长，降低了其生长速度。但是，除茎叶鲜重和干重外，各指标仍呈现增加趋势。在相同处理时间内，高浓度的铅处理使油麦菜叶片数、叶面积、株高和茎叶鲜重、干重指标明显下降，根系鲜重、干重则呈增加趋势。在高浓度铅处理下，四季菜心的各项指标呈现降低趋势。在0.005 mg/L的铅处理时，四季菜心各项指标略好于对照，油麦菜各项指标则略有降低；表明在低浓度下油麦菜对铅更敏感。在0.015 mg/L处理时，油麦菜和四季菜心各项生长指标均明显降低，四季菜心降低的更多；在0.045 mg/L铅高浓度处理下，油麦菜和四季菜心各项指标变化最大，生长受到明显抑制；高浓度铅对四季菜心的生长影响更大。
- Abstract:
- In order to understand the effect of lead on the growth of Lactuca sativaL.and Brassica campestris L.ssp，the seedlings of the two plants with different concentration of lead nitrate solution through the method of soilless cultivation were conducted，and growth indexes were analyzed.The results showed that lead processing influenced the two kinds of plants’ growth in different level，and reduced the rate of growth.However，all the indexes were still present the increasing trend，except the fresh weight，dry weight of stem leaf and root.In the same processing time，high levels of lead made the Lactuca sativa L.’s indexes of leaf number，leaf area，plant height and the fresh weight，dry weight of stem leaf declined obviously，and the fresh weight，dry weight of root increased.With high levels of lead processing，each index of Brassica campestris L.ssp trended to decrease.In 0.005 mg/L lead processing，each index of Lactuca sativa L.was slightly better than control，and each index of Brassica campestris L.ssp was slightly lower.It suggested that Lactuca sativa L. was more sensitive in low concentrations of lead.In 0.015 mg/L processing，each of the index of Lactuca sativa L.and Brassica campestris L.ssp reduced significantly，especially Brassica campestrisL.ssp reduced more.In 0.045 mg/L high concentration lead，each index of Lactuca sativa L.and Brassica campestrisL.ssp changed biggest，and the growth was obvious inhibition.So high concentrations of lead made more influence on the growth of Brassica campestris L.ssp.
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备注/Memo
第一作者简介：左凤月（1987-），女，河北廊坊人，硕士，研究方向为果树生物技术及育种。E-mail：zuofengyue@163.com.
通讯作者：杨静慧（1961-），女，甘肃兰州人，博士，教授，现主要从事园艺和生物技术方面的教学与研究工作。E-mail：jinghuiyang2@yahoo.com.cn.
基金项目：国家农业科技成果转化资金资助项目（2011GB2A100003）；国家住房和城乡建设部科学技术计划资助项目（2009-K7-22）。
收稿日期：2012-05-07