Relationship of soil properties and soil amendments to response of Glomus intraradices and soybeans
Relationship of soil properties and soil amendments to response of Glomus intraradices and soybeans
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DOI：
10.1139/b97-052
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发表时间：
1997-03-01
期刊：
影响因子：
--
通讯作者：
Ellis, JR
中科院分区：
文献类型：
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作者：
Frey, JE;Ellis, JR
了解土壤性质对菌根与寄主植物关系的作用可能有助于从生态学上理解真菌及其在本地或引进土壤条件下的有效性。本研究考察了丛枝菌根真菌(AM)和大豆寄主在五种基准土壤上的反应。在所有土壤中，茎干重、根长、地上部磷和地上部锌都有所增加。土壤改良剂(氮、磷和pH调节)影响单株菌根菌丝长度、菌丝根长比和地上部锌。土壤性质、大豆植株和这种菌根分离物之间的相互作用表明，土壤性质，如pH、孔径、泥沙和有机质，可能难以预测丛枝菌根真菌的反应。然而，在土壤改良之前，回归模型可以准确地预测该菌根分离物在植物上的地上部干重、菌根定植和菌丝发育。在土壤性质回归模型中加入土壤改良剂后，模型的预测能力大大降低或根本不存在。本研究中的观察结果表明，土壤性质对根部定殖和外部菌丝产量的影响在研究AM真菌与植物的相互作用中是重要的。了解土壤性质对于了解菌根真菌生态学和在生物系统中有效利用菌根至关重要。
Knowledge of the role of soil properties on mycorrhizal relationships with host plants may contribute to the ecological understanding of the fungus and its effectiveness in indigenous or introduced soil conditions. This study examined the response of Glomus intraradices, an arbuscular mycorrhizal (AM) fungus, and soybean host in five benchmark soils. Glomus intraradices increased, with a few exceptions, shoot dry weight, root length, shoot phosphorus, and shoot zinc in all soils. Soil amendments (nitrogen, phosphorus, and pH adjustments) affected mycorrhizal hyphal length per plant and hyphal to root length ratio, as well as shoot Zn. Interactions among soil properties, soybean plant, and this mycorrhizal isolate suggested that soil properties, such as pH, pore diameter, and silt and organic matter, may have difficulties predicting arbuscular mycorrhizal fungal response. However, before soil amendment, regression models were accurate in predicting shoot dry weight, mycorrhizal colonization, and hyphal development of this mycorrhizal isolate on plants. When soil amendments were added to the soil property regression model, the predictive ability of the model was greatly reduced or nonexistent. The observations in this study indicate the effects of soil properties on root colonization and external hyphal production are important in examining AM fungal - plant interaction. An understanding of soil properties will be essential to understand mycorrhizal fungal ecology and to effectively use mycorrhiza in biological systems.