Distribution of cesium and cationic mineral elements in napiergrass
Distribution of cesium and cationic mineral elements in napiergrass
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蓼草中铯和阳离子矿质元素的分布
DOI：
10.1007/s42452-019-1750-3
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发表时间：
2019
影响因子：
2.6
通讯作者：
Y. Ishii
中科院分区：
文献类型：
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作者：
D. Kang;Y. Seo;Y. Ishii
龙胆草是一种快速生长的多年生植物，以其积累铯 (Cs) 的巨大潜力而闻名。 Cs在植物体内的流动性很强，可以分布到植物的各个器官中。在这里，我们研究了铯 133 (133Cs) 和竞争性易位的阳离子矿物质，如钾 (K)、钙 (Ca) 和镁 (Mg) 在龙胆草不同器官中的分布。处理包括施用于土壤的四种浓度的 133 C：0（作为对照）；0（作为对照）； 300； 500；和 1000 μM。在 300 和 500 μM133Cs 处理下，叶片含有的 133Cs 浓度显着高于茎（P< 0.01）。具体而言，与成熟或较老的植物部分相比，在茎和叶片的年轻部分中测量到显着更高的 133 Cs 含量。在300、500和1000μM133Cs处理下，茎中较年轻部分的133Cs含量分别为5302、13,059和51,678mg·kg−1，叶片中的133Cs含量分别为6961、16,363和52,781mg·kg−1。在所有 133 Cs 处理条件下，茎中钾的分配比均高于叶片（P< 0.05）。叶片中 K 与 Ca 或 Mg 之间存在显着负相关，这表明 133 Cs 和 K 与尿草中的 Ca 或 Mg 具有类似的竞争性。我们得出结论， 133 Cs 分布到较年轻的植物部分，特别是叶片，并且Ca 和Mg 的易位受到器官内133 Cs 或K 的存在的强烈抑制。这表明 133 Cs 或 K 可以抑制 Mg 易位，并可能导致较年轻的植物部分缺镁。
Napiergrass is fast-growing perennial known for its high potential for accumulation of cesium (Cs). Cs is highly mobile within a plant and can be distributed to various plant organs. Here, we investigated the distribution of cesium-133 (133Cs) and competitively translocated cationic minerals, such as potassium (K), calcium (Ca), and magnesium (Mg), in different organs of napiergrass. Treatments comprised four concentrations of133Cs applied to soil: 0 (as control); 300; 500; and 1000 μM. Leaf blades contained significantly higher concentrations of133Cs than stems under 300 and 500 μM133Cs treatments (P< 0.01). Specifically, significantly greater133Cs content was measured in younger parts of stems and leaf blades compared with mature or older plant parts. The133Cs content in younger parts was 5302, 13,059, and 51,678 mg kg−1in stems and 6961, 16,363, and 52,781 mg kg−1in leaf blades under 300, 500, and 1000 μM133Cs treatments, respectively. Distribution ratios of K were higher in stems than in leaf blades in all133Cs-treated conditions (P< 0.05). A significantly negative correlation was found between K and Ca or Mg in leaf blades, suggesting that133Cs and K are similarly competitive with Ca or Mg within napiergrass. We conclude that133Cs is distributed to younger plant parts, especially leaf blades, and that translocation of Ca and Mg is strongly inhibited by the presence of133Cs or K within organs. This suggests that133Cs or K can inhibit Mg translocation and could lead to Mg deficiency in younger plant parts.
不同种植密度和刈割频率条件下使用龙胆草修复放射性铯137影响的土壤
DOI：
10.1007/s11270-017-3444-z
发表时间：
2017
期刊：
Water, Air, & Soil Pollution.
影响因子：
--
作者：
Kang Dong-Jin;Ishii Yasuyuki;Tazoe Hirofumi;Isobe Katsunori;Higo Masao;Hosoda Masahiro;Yamada Masatoshi;Tokonami Shinji
通讯作者：
Tokonami Shinji