| 摘要: |
| 紫背天葵（Begonia fimbristipula）是集营养保健和特殊风味为一身的野生高档蔬菜之一，也是
南方传统中药材，但人工栽培尚存在较大的技术障碍。以紫背天葵为研究对象，对分布于广西壮族自治
区贺州市姑婆山国家森林公园的野生植株根际土丛枝菌根真菌（Arbuscular Mycorrhiza Fungi，AMF）孢
子、菌根侵染率和土壤营养元素等开展研究，以期对后期的菌根化栽培提供技术支撑。结果表明：紫背
天葵根际土中AMF 种类丰富，孢子密度大，菌根侵染率较高，共统计真菌孢子26 种，主要属为球囊霉
属（Glomus）、无梗囊霉属（Acaulospora）、盾孢囊霉（Scutellospora）和巨孢囊霉属（Gigaspora）；根际
土孢子密度和菌根侵染率在不同采样点间存在显著性差异，而且均与土壤的全K 含量呈负相关，与交换
性Ca 含量呈正相关，另外，AMF 孢子丰富度与速效K 呈负相关，菌根侵染率与有机质含量呈正相关。
可见紫背天葵野生根际土的真菌孢子在K 含量较低时，多样性较高，主要为球囊霉属和无梗囊霉属的种
类。 |
| 关键词: 丛枝菌根真菌 多样性 孢子密度 菌根侵染率 紫背天葵 |
| DOI： |
| 分类号: |
| 基金项目:广东省林业厅科技项目(粤财农[2017]83号) |
|
| Diversity of Arbuscular Mycorrhizal Fungi of Begonia fimbristipula |
|
SU Yang,LIU Lubing,CAI Xinzhe,ZHU Chumeng and TANG Guangda
|
|
South China Limestone Plants Research Center,College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,China,South China Limestone Plants Research Center,College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,China,South China Limestone Plants Research Center,College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,China,South China Limestone Plants Research Center,College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,China,South China Limestone Plants Research Center,College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou,China
|
| Abstract: |
| Begonia fimbristipula is not only the very healthy and nourishing wild vegetable, but also a kind
of traditional Chinese medicine in South China. However, it is difficult to cultivate artificially up to now. In order
to provide technical support of mycorrhizal cultivation of B. fimbristipula, the soil nutrient elements, spores of
Arbuscular Mycorrhiza Fungi (AMF) and mycorrhizal infection rate with its rhizosphere soil and roots samples
collected from Gopu Mountain, Hezhou, Guangxi were studied. The results showed that there were high species
richness and spore density of AMF spores, as well as the high mycorrhizal infection rate in the rhizosphere soil
of B. fimbristipula. Totally, 26 AMF species were identified, belonging to four genera Glomus, Acaulospora,
Scutellospora and Gigaspora. There were significant differences in spore density and mycorrhizal infection rate
among different sampling points. Additionally, the soil total K content was negatively correlated with AMF spore
density and mycorrhizal infection rate. The soil exchangeable Ca content was positively correlated with the spore
density and mycorrhizal infection rate. The available K content was negatively correlated with the abundance of
AMF spores, and the organic matter content was positively correlated with mycorrhizal infection rate. Therefore,the AMF diversity was higher when K content was lower in rhizosphere soil B. fimbristipula, most fungi species
were the two genera of Glomus and Acaulospora. |
| Key words: AMF diversity spore density mycorrhizal infection rate Begonia fimbristipula |
