水培茶树对铅的吸收与累积特性研究

doi:10.13305/j.cnki.jts.2011.03.016

茶叶科学 ›› 2011, Vol. 31 ›› Issue (3): 237-246.doi: 10.13305/j.cnki.jts.2011.03.016

水培茶树对铅的吸收与累积特性研究

赵先明¹, 汪艳霞², 杜晓^2,3*, 李品武²

1. 宜宾职业技术学院,四川宜宾 644003;
2. 四川农业大学园艺学院,四川雅安 625014;
3. 四川省茶业科学与工程重点实验室,四川雅安 625014

收稿日期:2010-10-18 修回日期:2011-01-27 出版日期:2011-06-15 发布日期:2019-09-06
通讯作者: duxiao@vip.163.com
作者简介:赵先明（1963— ）,男,重庆市人,副教授,主要从事茶叶加工方面的研究。
基金资助:
四川省教育厅重点实验室项目（2006ZD010）、四川农业大学青年科技创新基金（00330300）

Uptake and Accumulation Characters of Lead in Tea Plants (Camellia sinensis) Grown in Hydroponics

ZHAO Xian-min¹, WANG Yan-xia², DU Xiao^2,3*, LI Pin-wu²

1. Yibin vocational and technical college, Yibin 644003, China;
2. College of Horticulture, Sichuan Agricultural University, Ya’an 625014, China;
3. Key Laboratory of Tea Science and Engineering in Sichuan province, Ya’an 625014, China;

Received:2010-10-18 Revised:2011-01-27 Online:2011-06-15 Published:2019-09-06

摘要/Abstract

摘要： 添加铅盐进行水培茶树试验,用火焰原子吸收光度法测定铅含量,研究茶树对铅的吸收、累积及分布特性。结果表明,铅离子能被根系或叶片大量吸收和累积,并按浓度差通过茎段转运与再分布;根施或叶部喷施2500mg/L的铅盐溶液,根系铅含量分别为8.00×10⁴mg/kg和8.38×10³mg/kg,叶片铅含量分别为551.79mg/kg和1.03×10⁴mg/kg,两者的铅富集量很高,但仍未见茶树死亡;当铅盐质量浓度为800~2000mg/L时,茶树逐渐受到铅危害,早期吸收根转为透明状,再褐变,后期叶片部分脱落;当铅盐质量浓度为300~800mg/L,水培茶树35d,茶树长势良好,未见受害症状。研究表明,水培茶树对铅具有大量吸收与累积的能力,并对铅危害有很强的抵抗与耐受力。

关键词: 茶树水培, 铅盐浓度, 铅吸收量, 铅累积倍数, 铅分布率

Abstract: Lead (Pb) concentration was investigated in tea plants (Camellia sinensis) grown in hydroponics by the FAAS method to understand the Pb uptake, accumulation and distribution characters in tea plants. The results showed that Pb ion can be uptaken and accumulated by roots in a large quantity, transported through stems along with concentration gradient, and redistributed. Cultured in 2500mg/L Pb solution or sprayed the same solution on leaves (cultured in distilled water), Pb concentration in roots were 8.00×10⁴mg/kg and 8.38×10³mg/kg, respectively, in leaves were 551.79mg/kg and 1.03×10⁴mg/kg respectively. Even such high accumulation the tea plants were still alived. At the range of 800~2000mg/L Pb solution, tea plants were gradually damaged; in the early time, absorbing roots became transparent, and then turned brown, and leaves were defoliated in the latter period. Tea plant cultured under the 300~800mg/L Pb solution for 35d, these plants grew well, and no damaged symptoms can be observed. Results indicated that tea plants possessed a strong ability of Pb uptake, accumulation and tolerance.

Key words: hydroponic tea plants, Pb solution concentration, Pb uptake, Pb cumulative multiple, Pb distribution

中图分类号:

赵先明, 汪艳霞, 杜晓, 李品武. 水培茶树对铅的吸收与累积特性研究[J]. 茶叶科学, 2011, 31(3): 237-246. doi: 10.13305/j.cnki.jts.2011.03.016.

ZHAO Xian-min, WANG Yan-xia, DU Xiao, LI Pin-wu. Uptake and Accumulation Characters of Lead in Tea Plants (Camellia sinensis) Grown in Hydroponics[J]. Journal of Tea Science, 2011, 31(3): 237-246. doi: 10.13305/j.cnki.jts.2011.03.016.

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水培茶树对铅的吸收与累积特性研究

Uptake and Accumulation Characters of Lead in Tea Plants (Camellia sinensis) Grown in Hydroponics

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