Abscisic acid relations of plants grown on tungsten enriched substrates
Abscisic acid relations of plants grown on tungsten enriched substrates
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DOI：
10.1007/s11104-007-9409-z
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发表时间：
2007-12-01
期刊：
影响因子：
4.9
通讯作者：
Hartung, Wolfram
中科院分区：
文献类型：
--
作者：
Jiang, Fan;Heilmeier, Hermann;Hartung, Wolfram
在温室或实验室的受控条件下以及在天然富含钨的地点的田间测试了钨作为植物中脱落阿坝合成潜在抑制剂的作用。虽然预测在所有情况下，醛氧化酶的活性被强烈抑制钨，在良好的浇水，温室生长的玉米植株的钨浓度的增加并没有降低组织中的阿坝浓度。取决于孵育的时间，主要是由于增加净阿坝合成的积累可以观察到。在干旱胁迫下，钨可能对阿坝积累有抑制作用。从一个靠近前钨矿的栖息地，用干旱胁迫的三叶草和三叶草进行的田间试验证实了温室和实验室的结果。钨在降低水分充足的植物阿坝水平上的无效性和它在抑制干旱植物阿坝积累上的微小作用表明它不适合作为阿坝生物合成的抑制剂。
The effect of tungsten as a potential inhibitor of ABA biosynthesis in plants was tested both under controlled conditions in the greenhouse or laboratory and in the field at a site naturally enriched with tungsten. Although as predicted in all cases the activity of aldehyde oxidase was strongly inhibited by tungsten, in well watered, greenhouse-grown maize plants increased concentrations of tungsten did not reduce ABA concentration in tissues. Depending on the time of incubation, mostly an accumulation due to an increased net ABA synthesis could be observed. Under drought stress, however, tungsten may have an inhibitory effect on ABA accumulation. Field experiments with drought-stressed clover and dandelion plants from a habitat close to a former tungsten mine confirm those of the greenhouse and laboratory. The ineffectiveness of tungsten in decreasing ABA levels in well-watered plants and its minimal effects in inhibiting ABA accumulation of droughted plants indicate that it is unsuitable as an inhibitor of ABA biosynthesis.