铝对茶树根细胞膜透性和根系分泌有机酸的影响
刘腾腾;郜红建;宛晓春;张正竹
【期刊名称】《茶叶科学》 【年(卷),期】2011(031)005
【摘要】采用溶液培养法研究了铝浓度对茶树根细胞膜透性和分泌低分子量有机酸的影响.结果表明,低质量浓度铝( 20 mg/L)有利于茶树根细胞膜的稳定,缺铝(0 mg/L,CK)和高铝(100 mg/L)均使根细胞膜透性显著降低.有机酸总量随铝浓度升高呈现先降低后升高的趋势.草酸、苹果酸和柠檬酸是茶树根系分泌的3种主要有机酸,占85％～93％；根系分泌草酸的量与对照相比,低铝和高铝时显著降低了84.7％和34.3％;分泌苹果酸的量与对照相比,低铝时增加了121.0％,高铝时降低了40.9％；铝浓度对柠檬酸的分泌量影响不大.研究结果可为阐明茶树根系的耐铝生理机制提供依据.%The impacts of aluminum (Al) concentration on root cell membrane permeability and components of organic acids in root exudates of tea plant (Camellia, sinensis L.) were investigated by hydroponics. Results showed that 20 mg/L of low Al concentration could enhance the cell membrane stability of tea root, and the membrane permeability was significantly declined with deficiency Al (0 mg/L, CK) and high Al (100 mg/L) treatments. The total organic acids firstly decreased and then increased with the increase of Al concentrations. About 85%~93% of the total organic acids in root exudates of tea plant were oxalic acid, malic acid and citric acid. Compared with CK, the oxalic acid secretion remarkably reduced 84.7%
and 34.3% under the low and high Al concentration treatments. Compared with CK, the malic acid of root exudates increased by 121.1% in low Al concentration, and decreased by 40.9% in high Al concentration. There wasn't significant influence on citric acid, containing about 3.5~4.5 mg/g. This result can provide critical data for elucidating tolerance mechanisms of Al stress on tea root. 【总页数】5页(458-462)
【关键词】铝浓度;茶树;根细胞膜透性;有机酸 【作者】刘腾腾;郜红建;宛晓春;张正竹
【作者单位】安徽农业大学资源与环境学院,安徽合肥230036;安徽农业大学资源与环境学院,安徽合肥230036;教育部茶叶生物化学与生物技术重点实验室,安徽合肥230036;教育部茶叶生物化学与生物技术重点实验室,安徽合肥230036;教育部茶叶生物化学与生物技术重点实验室,安徽合肥230036 【正文语种】中文
【中图分类】S571.1;Q945.78 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_journal-tea-science_thesis/0201259185546.html 【相关文献】
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铝对茶树根细胞膜透性和根系分泌有机酸的影响
