The objectives of this study were to investigate the growth and nutrient absorption in different tissues of perennial ryegrass under several levels of As stress, and to determine the relationships between absorption As and nutrient elements. As treatments at 0, 5, 10, 25, and 50 μM were applied to perennial ryegrass in hydroponic systems, and As and nutrient absorption in the mature leaves, expanded leaves, emerging leaves, and roots were determined. The effects of P, Ca, and Mg on the growth and As absorption of perennial ryegrass under As stress were also investigated. The biomass of the different tissues of perennial ryegrass decreased when the As concentration was greater than 5 μM. The As content was higher in roots relative to leaves regardless of As concentrations in nutrient solution, and leaf As content was greatest in the mature leaves and least in the emerging leaves. The As treatment reduced N, P, Ca, and Mg absorption in different tissues. A positive correlation of As content was found with the Mn content in the roots and all three kinds of leaves. The N, P, and K contents in the leaves were greatest in the emerging leaves and least in the mature leaves. The P, Ca, and Mg application decreased the As absorption of As-challenged perennial ryegrass. Our results indicated that As stress treatment reduced N, P, Ca, and Mg absorption and the As absorption was associated with leaf age and also levels of nutrients. Proper application of mineral nutrients may reduce As absorption of perennial ryegrass.

这项研究的目的是研究多年生黑麦草在不同水平的砷胁迫下在不同组织中的生长和营养吸收，并确定吸收砷与营养元素之间的关系。将0、5、10、25和50μM的处理施用于水培系统中的多年生黑麦草，并确定成熟叶片，膨胀叶片，新兴叶片和根中的As和养分吸收。还研究了磷，钙和镁对砷胁迫下多年生黑麦草生长和吸收砷的影响。当As浓度大于5μM时，多年生黑麦草不同组织的生物量减少。不论营养液中的砷浓度如何，根部的砷含量均高于叶片。叶片中的含量在成熟叶片中最大，而在新兴叶片中最少。As处理减少了不同组织中N，P，Ca和Mg的吸收。在根和所有三种叶片中，As含量与Mn含量呈正相关。叶片中的氮，磷和钾含量在新兴叶片中最大，而在成熟叶片中最小。施用磷，钙和镁会降低As挑战的多年生黑麦草的As吸收。我们的结果表明，As胁迫处理减少了N，P，Ca和Mg的吸收，而As吸收与叶龄和养分含量有关。正确施用矿物质营养素可能会减少多年生黑麦草的As吸收。在根和所有三种叶片中，As含量与Mn含量呈正相关。叶片中的氮，磷和钾含量在新兴叶片中最大，而在成熟叶片中最小。施用磷，钙和镁会降低As挑战的多年生黑麦草的As吸收。我们的结果表明，As胁迫处理减少了N，P，Ca和Mg的吸收，而As吸收与叶龄和养分含量有关。正确施用矿物质营养素可能会减少多年生黑麦草的As吸收。在根和所有三种叶片中，As含量与Mn含量呈正相关。叶片中的氮，磷和钾含量在新兴叶片中最大，而在成熟叶片中最小。施用磷，钙和镁会降低As挑战的多年生黑麦草的As吸收。我们的结果表明，As胁迫处理减少了N，P，Ca和Mg的吸收，而As吸收与叶龄和养分含量有关。正确施用矿物质营养素可能会减少多年生黑麦草的As吸收。我们的结果表明，As胁迫处理减少了N，P，Ca和Mg的吸收，而As吸收与叶龄和养分含量有关。正确施用矿物质营养素可能会减少多年生黑麦草的As吸收。我们的结果表明，As胁迫处理减少了N，P，Ca和Mg的吸收，而As吸收与叶龄和养分含量有关。正确施用矿物质营养素可能会减少多年生黑麦草的As吸收。