论文部分内容阅读
对大兴安岭落叶松林17个科26种植物丛枝菌根(AM)定居情况和丛枝菌根真菌(AMF)多样性进行了调查。在26种植物根样中形成典型AM定居的有23种,占88.46%。菌根侵染率为0～78.7%,平均为21.69%。在26种植物根样中,4种植物形成重楼型(Par-is-type)AM,占15.38%;10种植物形成疆南星型(Arum-type)AM,占38.46%;9种植物形成中间型(Intermediatetype)AM,占34.62%,3种植物未能形成AM菌根,占11.54%。从23种植物根围土样中分离到50种AMF,分属于5个属,其中无梗囊霉属(Acaulospora)24种占48%;球囊霉属(Glomus)19种占38%;内养囊霉属(Entrophospora)5种占10%;原囊霉属(Archaeospora)1种占2%;巨孢囊霉属(Gigaspora)1种占2%。Acaulospora和Glomus2属真菌在大兴安岭落叶松林土壤中占绝对优势;尼氏无梗囊霉(A.nocolsonii)和幼套球囊霉(G.etunicatum)是优势种。植物根围土壤中AMF的孢子密度平均为68.94个.100g-1风干土;AMF物种丰富度平均为7.83种。菌根侵染率与孢子密度和物种丰富度之间相关性不显著。
Arbuscular mycorrhizal (AM) colonization and arbuscular mycorrhizal fungi (AMF) diversity of 26 species in 17 families of Larch forest in Daxinganling were investigated. Among 26 plant root samples, 23 species were found to be typical AM colonies, accounting for 88.46%. Mycorrhizal infection rate was 0 ~ 78.7%, with an average of 21.69%. Among 26 plant root samples, 4 plants formed Par-is-type AM, accounting for 15.38%; 10 species formed Arum-type AM, accounting for 38.46%; 9 species formed Intermediate type AM accounted for 34.62%, three kinds of plants failed to form AM mycorrhizal, accounting for 11.54%. Fifty species of AMF were isolated from 23 kinds of plant rhizosphere soil samples, belonging to 5 genera, of which 24 species accounted for 48% of Acaulospora species and 19 species of Glomus species accounted for 38% 5 species of Entrophospora accounted for 10%; 1 species of Archaeospora accounted for 2%; 1 species of Gigaspora accounted for 2%. Acaulospora and Glomus2 fungi in Daxinganling larch forest soil accounted for absolute advantage; A. nocolsonii and sets of glomus mold (G.etunicatum) is the dominant species. The average spore density of AMF in the rhizosphere soil of the plant was 68.94, and the AMF species abundance was 7.83. The correlation between mycorrhizal infection rate and spore density and species richness was not significant.