茶树对铅胁迫响应其组织铅化学形态变化,本论文主要论述了茶树论文范文相关的参考文献,对您的论文写作有参考作用。
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摘 要 為了分析不同茶树对Pb（铅）胁迫的响应及其组织中不同化学形态Pb的累积特性,本研究采用盆栽种植法,探讨铁观音、肉桂2种茶树在不同浓度Pb胁迫下,茶树叶片光合生理指标,包括光合作用速率和叶绿素含量,以及茶树组织Pb含量和不同化学形态Pb含量的变化.结果表明,随着Pb浓度的增加,茶树光合生理指标呈现下降趋势,且和对照相比,铁观音下降的幅度高于肉桂.同一Pb胁迫浓度下,茶树组织中Pb含量表现为根>叶.不同化学形态Pb含量分析结果表明,随着Pb胁迫浓度的升高,2种茶树根部可交换态Pb、碳酸盐结合态Pb和残留态Pb含量百分比呈现下降趋势,而有机结合态Pb和铁锰氧化态Pb含量呈现上升趋势；2种茶树叶片碳酸盐结合态Pb、可交换态Pb、铁锰氧化态Pb和有机结合态Pb百分含量呈现上升趋势,而残留态Pb百分含量呈现下降趋势.进一步分析发现,在Pb胁迫下,不同的茶树表现出解毒模式的差异性.
关键词 茶树；Pb胁迫；化学形态；光合生理指标
中图分类号 S571.1 文献标识码 A
Biological Responses and Pb Speciation in Tissues After
Pb Exposure of Tea Plants
YE Jianghua1,4, WU Chengzhen1, JIA Xiaoli1,3, CHEN Xiaoting2,3, LI Yuanhua4, WANG Feiquan4,
LU Li4, ZHENG Maozhong1, HU Yongle1, ZHANG Qingxu2, WANG Haibin2,3 *
1 Fujian Provincial Key Laboratory of Eco-Industrial Green Technology（Wuyi University）, Wuyishan, Fujian 354300, China
2 College of Life Sciences, Longyan University, Longyan, Fujian 364012, China
3 Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, Fujian Agriculture and Forestry
University, Fuzhou, Fujian 350002, China
4 College of tea and food science, Wuyi University, Wuyishan 354300, China
Abstract In order to analyze the physiological responses of different tea trees to Pb stress and accumulation characteristics of Pb with different chemical forms in different tissues of tea trees, photosynthesis rate, chlorophyll content, Pb content in different tissues and Pb content with different chemical forms of Tieguanyin and Rougui tea plants were measured under Pb stess with different concentrations in pot culture. Results showed that the photosynthesis rate and chlorophyll content of tea plants descended with the increase of Pb stress concentration, but the falling range of Tieguanyin was higher than Rougui as compared with the control. At the same concentration of Pb stress, Pb contents in tea plant roots and leaves performed root> leaf. Analysis of Pb contents with different chemical forms showed that the content percentages of exchangeable Pb, carbonate-bound Pb, residual Pb from two tea tree roots had downward trends, while organic-bound Pb and Pb with Fe-Mn oxidation state had upward trends as stress concentration increased. Content percentages of exchangeable Pb, carbonate-bound Pb, organic-bound Pb and Pb with Fe-Mn oxidation state in the leaf appeared to be rising, while residual Pb declined. Further analysis indicated that detoxification patterns of different tea plant varieties exhibited variance under Pb stress.
结论：关于本文可作为茶树方面的大学硕士与本科毕业论文茶树精油的功效与作用论文开题报告范文和职称论文论文写作参考文献下载。
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