Blueberries develop a shallow and fibrous root system, with sparse root hairs, normally colonized by mycorrhizal fungi. The presence of endophytic fungi in blueberry roots has been studied mainly in the area of origin of each species. The aims of the present study were to determine the occurrence of endophytic fungi in the roots of southern highbush blueberry (SHB) cultivars, in the three most important blueberry production areas of Argentina, and identify them. Soil samples with blueberry rootlets were obtained and endophytic fungi were isolated from them. Some of them by classical taxonomy identification, and, when this was not possible, PCR amplified material were sequenced (Macrogen laboratory), DNA fragments were analyzed with the Basic Local Alignment Search Tool (BLAST) and identified, through GenBank. Blueberry roots were found to be colonized by a large number of fungal genera, which varied greatly among locations and cultivars. Some of the endophytic fungi identified have pathogenic function, others are only plant hosts, and some of them have mycorrhizal function as is the case of genus Oidiodendron where we found O. maius and O. echinulatum. We may conclude that SHB is associated with local ericoid fungi, some of which are mycorrhizal and some dark septate endophytes, which, in most cases, do not match with those found in production regions of their native area, but same of them are important to promote blueberry growth.

蓝莓的根系浅而纤维化，根毛稀疏，通常由菌根真菌定植。主要在每种物种的起源地区研究了蓝莓根中内生真菌的存在。本研究的目的是确定在阿根廷三个最重要的蓝莓产区南部高灌木蓝莓（SHB）品种的根中是否存在内生真菌，并对其进行鉴定。获得具有蓝莓根的土壤样品，并从中分离出内生真菌。其中一些通过经典分类法鉴定，当不可能时，对PCR扩增的物质进行测序（Macrogen实验室），使用基本局部比对搜索工具（BLAST）分析DNA片段，并通过GenBank进行鉴定。蓝莓根被大量真菌属定居，真菌的位置和品种之间差异很大。鉴定出的一些内生真菌具有致病功能，其他仅是植物宿主，其中一些具有属的菌根功能。发现了O. maius和O. echinulatum的Oidiodendron。我们可能得出的结论是，SHB与局部类胡萝卜素真菌有关，其中一些是菌根真菌和一些深色的分隔内生菌，在大多数情况下，它们与在其本地区的产地中发现的不匹配，但它们对促进蓝莓的生长。