EFFECT OF REPLACING NUTRIENT POTASSIUM BY SODIUM ON UPTAKE AND DISTRIBUTION OF SODIUM IN TOMATO PLANTS
EFFECT OF REPLACING NUTRIENT POTASSIUM BY SODIUM ON UPTAKE AND DISTRIBUTION OF SODIUM IN TOMATO PLANTS
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DOI：
10.1007/bf02107188
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发表时间：
1978-01-01
期刊：
影响因子：
4.9
通讯作者：
BESFORD, RT
中科院分区：
文献类型：
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作者：
BESFORD, RT
番茄植物 (Lycopersicon esculentum cv. Amberley Cross) 在一系列营养液中生长，其中 0、60、90、95、98 和 99% 的钾被钠取代。植物从营养液中选择性地吸收钾（相对于钠），并优先将钾（钾）输送到芽中。在具有最高 K/Na 比的营养液中，植物吸收的大部分 Na 积累在根部，但随着 K 逐渐被 Na 取代，吸收的总 Na 中越来越多的部分被输送到叶子。 Na 的含量高达完整、完全展开的叶子干重的 2.4%，而没有任何明显的视觉损害迹象或植物生长速度降低。运输到叶子的大部分 Na 被排除在层流组织之外并积累在相邻的叶柄中。根和叶柄保留大量钠的能力取决于向植物提供充足的钾。
Tomato plants (Lycopersicon esculentum cv. Amberley Cross) were grown in a series of nutrient solutions in which 0, 60, 90, 95, 98 and 99% of the K was replaced by Na. The plants selectively absorbed K relative to Na from the nutrient solutions and transported K to the shoots in preference to Na. In the nutrient solution having the highest K/Na ration most of the Na taken up by the plants accumulated in the roots, but as the K was progressively replaced by Na an increasing proportion of the total Na absorbed was transported to the leaves. Na was present at up to 2.4% of the dry weight of whole, fully-expanded leaves without there being any apparent visual signs of damage or reduction in the rate of growth of the plants. Most of the Na transported to the leaves was excluded from the laminar tissue and accumulated in the adjacent petioles. The ability of the roots and petioles to retain large amounts of Na depended on an adequate supply of K to the plants.