| 英文摘要 |
This study investigated spore density, community structure, and diversity of arbuscular mycorrhizal fungi (AMF), and root colonisation in Pancratium maritimum L. in coastal dunes of Cap Falcon (Oran coast, North-Western Algeria). Spatial and seasonal variation were assessed across three sites over four seasons (2018–2019). Physicochemical properties of rhizosphere soils were analysed, and AMF spores were extracted by wet sieving and centrifugation, followed by morpho-taxonomic identification and ecological index calculation. Root colonisation was assessed after histochemical staining. Two-way ANOVA evaluated spatial and seasonal variation, while Canonical Correlation Analysis (CCA) explored relationships between soil physicochemical properties and AMF spore density, community structure, diversity and colonisation. Significant spatio-temporal variation (p < 0.05) was observed for most soil and AMF variables, reflecting dynamic AMF symbiosis in limestone-rich, nutrient-poor coastal dune soils. 15 AMF species belonging to 7 genera and 4 families of the phylum Glomeromycota were identified, with a clear predominance of the family Glomeraceae, particularly the genus Glomus. Mean AMF spore density reached 49.24 spores per 100 g of dry soil, and mycorrhizal frequency remained consistently high, indicating strong mycotrophy of P. maritimum. Spatial differences reflected the influence of local soil conditions, while seasonal patterns showed higher colonisation intensity in spring and increased spore density and diversity in autumn. CCA revealed that AMF diversity and spore density were positively associated with soil calcium carbonate, electrical conductivity and sand content, whereas root colonisation was mainly associated with available phosphorus and soil organic matter. |
本站僅提供期刊文獻檢索。
