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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 solution culture was used to study the nutrition and interaction of phosphorus and zinc in maize and wheat under different phosphorus and zinc concentrations. The results showed that with the increase of phosphorus concentration (0, 0.12, 0.6, 3.0 mmol / L), the content of phosphorus in the cell wall, cytoplasm and vacuole of roots and leaves of maize and wheat also increased. The content of phosphorus in the vacuole is higher than that in the cytoplasm. The increase of phosphorus concentration in the medium increased the content of zinc in the root cell wall, but the treatment with high phosphorus (3.0 mmol / L) decreased the content of zinc in the cytoplasm and vacuole. Phosphorus treatment inhibited the transport of zinc from roots to shoots in both crops, and most of the zinc in the leaves was bound in the cell wall, leaving the cytoplasm and vacuole in leaf cells relatively low in zinc. Compared with the supply of sufficient zinc (2.0μmol / L), the concentration of phosphorus in the cell wall, cytoplasm and vacuole of maize and wheat roots and leaves increased with low zinc (0.1μmol / L) treatment. The supply of low zinc and excess phosphorus inhibits plant growth, eventually leading to a decrease in dry matter accumulation.