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首页> 外文期刊>Mycologia >Septoglomus fuscum and S. fiircatum, two new species of arbuscular mycorrhizal fungi (Glomeromycota)
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Septoglomus fuscum and S. fiircatum, two new species of arbuscular mycorrhizal fungi (Glomeromycota)

机译：Septoglomus fuscum和S. fiircatum，两种新的丛枝菌根真菌（Glomeromycota）

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摘要

Two new arbuscular mycorrhizal fungal species, (Glomeromycota) Septoglomus fuscum and S. furcatum, are described and illustrated. Spores of S. fuscum usually occur in loose hypogeous clusters, rarely singly in soil or inside roots, and S. furcatum forms only single spores in soil. Spores of S. fuscum are brownish orange to dark brown, globose to subglobose, (20-)47(-90) mu m diam, rarely ovoid, 21-50 X 23-60 um. Their spore wall consists of a semi-persistent, semi-flexible, orange white to golden yellow, rarely hyaline, outer layer, easily separating from a laminate, smooth, brownish orange to dark brown inner layer. Spores of S. furcatum are reddish brown to dark brown, globose to subglobose, (106-) 138 (-167) mu mdiam, rarely ovoid, 108-127 X 135-160 mu m, usually with one subtending hypha that is frequently branched below the spore base, or occasionally with two subtending hyphae located close together. Spore walls consists of a semi-permanent, hyaline to light orange outermost layer, a semipermanent, hyaline to golden yellow middle layer, and a laminate, smooth, reddish brown to dark brown innermost layer. None of the spore-wall layers of S. fuscum and S. furcatum stain in Melzer's reagent. In the field, S. fuscum was associated with roots ofArctotheca populifolia colonizing maritime dunes located near Strand in South Africa and 5. furcatum was associated with Cordia oncocalyx growing in a dry forest in the Ceara State, Brazil. In single-species cultures with Plantago lanceolata as host plant, S. fuscum and S. furcatum formed arbuscular mycorrhi-zae. Phylogenetic analyses of the SSU, ITS and LSU nrDNA sequences placed the two new species in genus Septoglomus and both new taxa were separated from described Septoglomus species.
机译：描述并举例说明了两种新的丛枝菌根真菌种类：（Glomeromycota）Septoglomus fuscum和S. furcatum。镰刀菌的孢子通常出现在疏松的次簇中，很少单在土壤中或在根部内部，而短链孢子菌在土壤中仅形成单个孢子。镰刀菌的孢子为棕橙色至暗褐色，球状至近球状，直径（20-）47（-90）微米，很少卵球形，21-50 X 23-60 um。它们的孢子壁由半持久，半柔韧性，橙白色至金黄色，很少为透明的外层组成，很容易与层压的，光滑的棕橙色至深棕色内层分离。 S. furcatum的孢子为红棕色至暗棕色，球形至近球形，（106-）138（-167）微米，很少卵球形，108-127 X 135-160微米，通常带有一个对分的菌丝，该菌丝经常分支低于孢子基，或偶尔有两个对向的菌丝紧靠在一起。孢子壁由半永久性的透明至浅橙色的透明外层，半永久性的透明至金黄色的透明中间层和光滑的红棕色至深棕色的层压内层组成。梅尔氏试剂中的鼠伤寒沙门氏菌和糠fur链球菌的孢子壁层均未染色。在田间，镰刀菌与位于南非斯特兰德附近的定居者沙丘Arctotheca populifolia的海洋沙丘的根相关。5.臭鼬与巴西塞阿拉州干燥森林中生长的Cordia oncocalyx有关。在以车前草为寄主植物的单种培养中，镰刀菌和糠fur链球菌形成丛枝菌根。对SSU，ITS和LSU nrDNA序列进行系统进化分析，将两个新物种置于Septoglomus属中，并将这两个新的分类群与所述的Septoglomus物种分开。

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