[1]杨斌,张文辉*. 竹柳对Pb2+胁迫的响应及其Pb富集能力[J].西北林学院学报,2016,31(1):36-41.[doi:10.3969/j.issn.1001-7461.2016.01.07]
　YANG Bin,ZHANG Wen-hui*. Responses of Salix matsudana Koidz cv.zhuliu to Pb2+ Stress and Its Accumulation Ability[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2016,31(1):36-41.[doi:10.3969/j.issn.1001-7461.2016.01.07]
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 竹柳对Pb2+胁迫的响应及其Pb富集能力()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第31卷
期数:
2016年第1期
页码:
36-41
栏目:
出版日期:
2016-01-31

文章信息/Info

Title:
 Responses of Salix matsudana Koidz cv.zhuliu to Pb2+ Stress and Its Accumulation Ability
文章编号:
1001-7461(2016)01-0036-06
作者:
 杨斌1; 2; 张文辉2*
 （1.西北农林科技大学 生命科学学院，陕西 杨陵 712100；2.西部环境与生态教育部重点实验室，陕西 杨陵 712100）
Author(s):
 YANG Bin1; 2; ZHANG Wen-hui2*
 (1.College of Life Sciences,Northwest A&F University,Yangling,Shaanxi 712100,China; 2.Education Ministry Key Laboratory of Environment and Ecology in West China,Yangling,Shaanxi 712100,China)
关键词:
 ; 竹柳; 重金属; Pb2+胁迫; 光合参数; 矿质元素
Keywords:
Salix matsudana Koidz cv.zhuliu;  heavy metal;  Pb2+ stress;  photosynthetic parameter;  mineral element
分类号:
S792.12
DOI:
10.3969/j.issn.1001-7461.2016.01.07
文献标志码:
A
摘要:
 为了阐明竹柳（Salix matsudana Koidz cv.zhuliu）对重金属Pb2+胁迫的耐受性和吸附能力，以竹柳插穗（直径1 cm，长度15 cm）生根苗为材料，在水培试验条件下，观测不同Pb2+浓度（0、100、200、400 mg·L-1）下的竹柳生长、光合参数和各器官矿质元素含量，分析Pb2+胁迫对竹柳的影响。结果表明：竹柳株高、叶数、根长及生物量在100 mg·L-1 Pb2+胁迫下均增加，但在200、400 mg·L-1胁迫下，均受到抑制；100 mg·L-1 Pb2+胁迫促进竹柳光合速率，随着Pb2+胁迫递增，在200、400 mg·L-1 Pb2+胁迫下，竹柳的净光合速率、蒸腾速率和气孔导度受到抑制，胞间CO2浓度升高；不同Pb2+胁迫条件下，在竹柳各器官的分布情况为：根>叶>茎，随着Pb2+胁迫递增，Pb2+在各器官的积累也逐渐升高，但相应的转运系数和富集系数则逐渐减小；不同浓度Pb2+胁迫，促进了竹柳各器官对矿质元素Ca2+的吸收（p<0.05），但却抑制了K+和Mg2+的吸收。表明竹柳对Pb2+胁迫有一定的耐受性和适应性。
Abstract:
 To study the tolerance and adsorption capacity of Salix matsudana Koidz cv.zhuliu against Pb2+ contamination,cuttings of S.matsudana were cultured in water with four different Pb2+ concentrations (0,100,200 and 400 mg·L-1).The growing indexes,photosynthetic parameters and the contents of mineral elements in various organs were measured and analyzed.The results showed that,100 mg·L-1 Pb2+ stress promoted the growth,while 200 mg·L-1 and 400 mg·L-1 Pb2+ stress suppressed the plant height,leaf number,the length of root and the biomass.With the increase of Pb2+ concentration,the photosynthetic rate,transpiration rate and stomatal conductance firstly increased and then decreased,however the intercellular CO2 concentration increased continuously.The distribution of Pb2+ in various organs was in the order of root > leaf > stem.Pb2+ accumulated gradually in various organs with the increase of Pb2+ concentration,but both the corresponding transport coefficients and the enrichment factors decreased.Pb2+ stress facilitated the absorption of Ca2+ in different organs significantly (p<0.05),but inhibited the absorption of K+ and Mg2+.The study indicated that S.matsudana Koidz cv.zhuliu could adapt and resist Pb2+ stress in a certain extent.

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备注/Memo

备注/Memo:
 收稿日期：2015-03-04修回日期：2015-05-29
基金项目：天津市农业科技成果转化项目（201102060）。
作者简介：杨斌，男，硕士研究生，研究方向：植物生理生态学。E-mail:yangbin23@126.com
*通信作者：张文辉，男，教授，研究方向：植物生理生态学。E-mail:zwhckh@163.com
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