...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plant and Soil >Phytotoxicity of aluminium-fluoride complexes and their uptake from solution culture by Avena sativa and Lycopersicon esculentum.
【24h】

Phytotoxicity of aluminium-fluoride complexes and their uptake from solution culture by Avena sativa and Lycopersicon esculentum.

机译：氟化铝络合物的植物毒性以及燕麦和番茄对溶液培养的吸收。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Oats cv. Echidna and tomatoes cv. Floridade were grown in dilute nutrient solutions supplemented with Al and/or F. In solutions containing Al and F, shoot growth was limited when predicted potentially rhizotoxic Al activity (Alr; the sum of Al3+, AlOH2+ and Al(OH)2+ activities) was <0.1 鍹, three orders of magnitude lower than the critical value determined with Al alone. The data suggest that at the activities used in these experiments, Alr is most toxic, AlF2+ and AlF2+ are less toxic, and AlF3, and AlF4- and F- are least toxic. Fluoride concentrations in shoots grown in solutions correlated best with positively charged AlFx3-x species (i.e. AlF2+, AlF2+) and the molar ratio of F:Al in most plants shoots was about 3:2. However, when activities ofpositively charged AlFx3-x species were low (<50 鍹) and the activity of AlF3 species high (500 鍹) the molar ratio of F:Al in plant shoots suggested AlF3 was taken up. These findings are discussed in relation to plant uptake and toxicity. Measured concentrations of Alr and F- in solutions containing Al and F were compared with concentrations predicted by a computer model (GEOCHEM-PC). The method for measuring F- concentrations, using a non-complexing buffer and F ion-selective electrode, gave good agreement with predicted F- concentrations. The 8-hydroxyquinoline method for measuring Alr concentrations did not agree with predicted concentrations, highlighting the limitations of this method when measuring Alr in the presence of F in a multi-ligand system with high concentrations of F and Al.
机译：燕麦简历针chi和西红柿简历。佛罗里达州在补充Al和/或F的稀营养液中生长。在含有Al和F的溶液中，当预测潜在的根际毒性Al活性（Alr; Al3 +，AlOH2 +和Al（OH）2+活性的总和）时，芽的生长受到限制。 ＜0.1鍹，比仅用Al测定的临界值低三个数量级。数据表明，在这些实验中使用的活性下，Alr毒性最高，AlF2 +和AlF2 +毒性较小，而AlF3，AlF4-和F-毒性最低。在溶液中生长的枝条中的氟化物浓度与带正电的AlFx3-x物种（即AlF2 +，AlF2 +）最相关，大多数植物枝条中F：Al的摩尔比约为3：2。但是，当带正电荷的AlFx3-x物种的活性较低（<50鍹）而AlF3物种的活性较高（500鍹）时，植物苗中F：Al的摩尔比表明AlF3被吸收。讨论了与植物吸收和毒性有关的这些发现。将含有Al和F的溶液中测得的Alr和F-浓度与计算机模型（GEOCHEM-PC）预测的浓度进行比较。使用非复合缓冲液和F离子选择电极的F-浓度测量方法与预测的F-浓度吻合良好。用于测量Alr浓度的8-羟基喹啉方法与预期浓度不一致，突出了在高F和Al浓度的多配体系统中在F存在下测量Alr时该方法的局限性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号