摘要
采用溶液培养研究玉米、小麦在不同磷、锌浓度下细胞磷、锌营养及交互作用。结果表明,随着外界磷浓度(0,0.12,0.6,3.0mmol/L)的提高,玉米、小麦根系和叶片细胞壁、细胞质和液泡中磷含量也随之增高,但细胞壁和液泡中磷的含量高于细胞质中的含量。介质中磷浓度的提高使根细胞壁中锌的含量增加,但高磷(3.0mmol/L)处理使细胞质、液泡中锌的含量下降。高磷处理抑制了两种作物的锌由根系向地上部的转运,同时叶片中大部分锌被结合在细胞壁中,因而叶细胞中的细胞质和液泡处于相对的低锌状态。与足量锌(2.0μmol/L)供应比较,低锌(0.1μmol/L)处理使玉米、小麦根系和叶细胞壁、细胞质和液泡中磷的浓度增高。低锌和过量磷的供给抑制了植株的生长,最终使干物质的积累下降。
The cellular nutrition of phosphorus and
zinc and their interaction in corn and wheat under the varied phosphorus and zinc were
investigated in solution culture. The results showed that the increased phosphorus content of
cell walls, cytoplasm and vacuoles in both leaved and roots of corn and wheat were observed
with the increasing phosphorus supply (0, 0.12, 0.6, 3.0 mmol/L) in the medium. However, the
content of phosphorus in the cell wall was higher than that in the cytoplasm. The enhanced
phosphorus in the culture solution increased the content of zinc in the root cell wall, but the
treatment of 3 mmol/L P made the zinc content in cytoplasm and vacuoles decreased. High
treatment with phosphorus inhibited the zinc translocation from roots to shoots in both crops. In
addition, as most of zinc in leaves was bound to in the cell wall, a relative low zinc contents in
the leaf cytoplasm and vacuoles were expected compared to the treatment of rich zinc supply
(2.0 mol/L) and decreased application of zinc (0.1 mol/L) increased the content of phosphorus in
the leaf and root cell in corn and wheat. As a result, the stunted growth of both crops was
attributed to the imbalance of low zinc and high phosphorus concentrations in the plants.
出处
《植物营养与肥料学报》
CAS
CSCD
1999年第2期150-155,共6页
Journal of Plant Nutrition and Fertilizers
基金
国家自然科学基金