Long-distance transport of alkali metals in maturing wheat
Long-distance transport of alkali metals in maturing wheat
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DOI：
10.1023/a:1002806522138
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发表时间：
2000-01-01
影响因子：
1.5
通讯作者：
Feller, U
中科院分区：
文献类型：
--
作者：
Zeller, S;Feller, U
碱金属铯、铷、锂和钠与锶一起通过叶片引入到田间生长的成熟完整冬小麦（Triticum aestivum L. cv. Arina）的叶片或茎中。研究了这些元素的长距离迁移以及施用日期和不同施用位置的影响。韧皮部不动的 Sr 充当植物中木质部汁液分布的标记。与对照植物相比，处理对籽粒中的干物质积累和每个芽的蒸腾没有显着影响。 Cs和Rb的韧皮部迁移率相当高。 Li 的韧皮部几乎不动（与 Sr 类似）。施用到第二叶节下方的切茎木质部中比施用到旗叶中对谷物中的内容物贡献更大。较早的饲喂日期导致谷物中的积累量较高。成熟过程中施加的元素的显着损失（对于锂来说最明显）可以用雨水中的渗漏来解释。
The alkali metals cesium, rubidium, lithium and sodium were introduced together with strontium via flaps into leaf laminas or into the stem of maturing, intact winter wheat (Triticum aestivum L. cv. Arina) grown in a field. Long-distance transport of these elements and the influence of the application date and of different application positions were investigated. The phloem-immobile Sr served as a marker for the distribution of the xylem sap in the plants. Dry matter accumulation in the grains and the transpiration per shoot were not markedly affected by the treatments as compared to control plants. The phloem mobility was rather high for Cs and Rb. Li was almost immobile in the phloem (similarly to Sr). An application into the cut stem xylem below the second leaf node contributed more to the contents in the grains than an application into the flag leaf. An earlier feeding date led to a higher accumulation in the grains. The marked losses of the elements applied during maturation (most pronounced for Li) can be explained by leakage in the rain.