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首页> 外文期刊>Plant and Soil >Responses of mycorrhizal colonization to nitrogen and phosphorus addition in fourteen woody and herbaceous species: the roles of hypodermal passage cells and penetration points
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Responses of mycorrhizal colonization to nitrogen and phosphorus addition in fourteen woody and herbaceous species: the roles of hypodermal passage cells and penetration points

机译：14种木本和草本植物菌根定植对氮磷添加的响应：皮下传代细胞的作用和渗透点

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Abstract Background and aims The rate of mycorrhizal colonization in plant roots generally decreases with increased soil nutrient availability but the underlying mechanism is still poorly understood. Our aims were to explore the responses of root mycorrhizal colonization, passage cells, and penetration points under nitrogen (N) and phosphorus (P) addition and their potential linkages in woody and herbaceous plants.Methods N and P were added to the pots of 14 temperate species (eight woody and six herbaceous) in the greenhouse, and the distribution of mycorrhizal colonization, passage cells and penetration points for each species were observed by staining and microscopy of first-order roots.Results The average density and proportion of mycorrhizal colonization, passage cells and penetration points of 14 species were significantly decreased under N and P addition. The N addition had a stronger effect on the plants than the P addition. More importantly, the mycorrhizal colonization density and proportion showed significant positive correlations with passage cell density and proportion, and with penetration point density and proportion of woody and herbaceous plants under control and nutrient treatments.Conclusions The density and proportion of mycorrhizal colonization were closely related with passage cells and penetration points in both woody and herbaceous species in either control or nutrient treatments. Our results are of great significance for understanding the relationship between soil fungi and plant roots under changes of soil nutrient availabilities.
机译：摘要 背景和目的 菌根在植物根系定植率普遍随着土壤养分有效性的增加而降低，但其机制仍知之甚少。本研究旨在探讨根系菌根定植、传代细胞和渗透点在氮（N）和磷（P）添加下的响应及其潜在联系。方法 在温室14个温带树种（8个木本和6个草本）的花盆中添加N、P，通过一级根的染色和显微镜观察各树种菌根定植、传代细胞和穿透点的分布。结果 氮、磷添加下，14个物种菌根定植、传代细胞和穿透点的平均密度和比例均显著降低。氮添加对植株的影响大于磷添加。更重要的是，菌根定植密度和比例与传代细胞密度和比例呈显著正相关，与对照和养分处理下木本和草本植物的穿透点密度和比例呈显著正相关。结论 无论是对照还是养分处理，菌根定植密度和比例均与木本和草本物种的传代细胞和穿透点密切相关。研究结果对于理解土壤养分有效性变化下土壤真菌与植物根系的关系具有重要意义。

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