[1]宋清玉,王进鑫*,杨楠. 铅胁迫对几种乔木种子萌发及活力的影响研究[J].西北林学院学报,2017,32(4):7-12.[doi:10.3969/j.issn.1001-7461.2017.04.02]
　SONG Qing-yu,WANG Jin-xin*,YANG Nan. Effects of Lead Stress on Seed Germination and Vigor of Several Tree Species[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2017,32(4):7-12.[doi:10.3969/j.issn.1001-7461.2017.04.02]
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 铅胁迫对几种乔木种子萌发及活力的影响研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第32卷
期数:
2017年第4期
页码:
7-12
栏目:
出版日期:
2017-07-31

文章信息/Info

Title:
 Effects of Lead Stress on Seed Germination and Vigor of Several Tree Species
文章编号:
1001-7461(2017)04-0007-06
作者:
 宋清玉1; 王进鑫2; 3*; 杨楠2
 （1.西北农林科技大学 林学院，陕西 杨陵 712100；2.西北农林科技大学 资源环境学院，陕西 杨陵 712100；3.农业部 西北植物营养与农业环境重点实验室，陕西 杨陵 712100）
Author(s):
 SONG Qing-yu1; WANG Jin-xin2; 3*; YANG Nan2
 (1.College of Forestry,Northwest A&F University,Yangling,Shaanxi 712100,China; 2.College of Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China; 3.Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China,Ministry of Agriculture,Yangling,Shaanxi 712100,China）
关键词:
 ; 土壤污染; 铅胁迫; 乔木树种; 种子萌发; 活力指数
Keywords:
 ; soil pollution;  lead stress;  tree species;  seed germination;  vigor index
分类号:
S723.13
DOI:
10.3969/j.issn.1001-7461.2017.04.02
文献标志码:
A
摘要:
 通过对不同浓度铅胁迫下的侧柏、油松、栾树、刺槐4种乔木种子进行种子萌发培养试验，研究了土壤铅胁迫对4种乔木种子萌发特征的影响。结果表明，低浓度的铅胁迫对侧柏、油松、刺槐种子的萌发有一定的促进作用，但作用不显著；随着铅浓度的升高，促进作用逐渐转变为抑制作用，且铅浓度越高，抑制作用越大，均达到了显著水平。而铅胁迫始终对栾树种子的萌发有抑制作用。不同树种的种子萌发对高浓度的铅胁迫耐性有所不同，11 000 mg·kg-1的铅胁迫已完全抑制了刺槐种子的萌发，栾树和油松种子发芽抑制率则分别在13 000、15 000 mg·kg-1的铅胁迫下达到100%，而侧柏种子在15 000 mg·kg-1的铅胁迫下仍可发芽。综合分析4种树种种子萌发的各项指标，铅胁迫对各树种的活力指数影响最大。综上分析表明，侧柏、油松对铅胁迫抗性较强，而栾树、刺槐对铅胁迫较为敏感。因此油松、侧柏2种乔木树种适合用于铅污染土壤的修复。
Abstract:
 Effects of different concentrations of Pb2+ (0-15 000 mg·kg-1) on seed germination of four tree species (Pinus tabuliformis,Platycladus orientalis,Koelreuteria paniculata,Robinia pseudoacacia) were investigated.The results showed that low concentration lead stress stimulated the seed germination of P.tabuliformis,P.orientalis and R.pseudoacacia,but the stimulation effect was not significant.With the increase of lead concentration,the promotion effect was gradually changed into the inhibition effect,and the higher the lead concentration,the greater the inhibition effect,then reached a significant level.The seed germination of K.paniculata was inhibited under any lead concentration stress.The seed germination of R.pseudoacacia was completely inhibited under 11 000 mg·kg-1 lead stress.The seed germination inhibition rate to P.tabuliformis and P.orientalis were sequentially reached 100% under 13 000 mg·kg-1 and 15 000 mg·kg-1 lead stress,and the seed of P.orientalis could still germinate under 15 000 mg·kg-1 lead stress.Comprehensive analysis of the seed germination indexes of four tree species indicated that the effect of lead stress on the seed vigor index was the largest.The foregoing analysis showed that P.orientalis and P.tabuliformis had strong resistance to lead stress,and K.paniculata and R.pseudoacacia were more sensitive to lead stress.So P.orientalis and P.tabuliformis were suitable for the vegetation restoration on lead contaminated soil.

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备注/Memo

备注/Memo:
 收稿日期：2016-10-31修回日期：2016-12-12
基金项目：国家自然科学基金(31170579，31670713)；陕西省科技统筹创新工程计划项目(2016KTCL03-18)。
作者简介：宋清玉，女，硕士研究生，研究方向：重金属污染土壤修复。E-mail:sqy280452511@163.com
*通信作者：王进鑫，男，教授，博导，研究方向：旱区人工林生态系统生物节水与环境生态学理论。E-mail:jwang118@126.com
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