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| 西双版纳地区龙脑香科植物AM真菌的初步研究 | |
| 引用本文： | 石兆勇,陈应龙,刘润进,王维华.西双版纳地区龙脑香科植物AM真菌的初步研究[J].植物生态学报,2003,27(3):360-365. |
| 作者姓名： | 石兆勇 陈应龙 刘润进 王维华 |
| 作者单位： | 1. 中国林业科学研究院热带林业研究所,广州,510520;莱阳农学院菌根实验室,山东莱阳,265200 2. 中国林业科学研究院热带林业研究所,广州,510520 3. 莱阳农学院菌根实验室,山东莱阳,265200 |
| 基金项目： | 国际热带木材组织 (ITTO)PD38/98项目 ( 2 0 0 1_2 0 0 3)，中国林业科学研究院基金重点课题2 0 0 1_0 3( 2 0 0 2_2 0 0 4 ) |
| 摘 要： | 对云南省西双版纳地区17种龙脑香科树种根系丛枝菌根（Arbuscular mycorrhiza, AM）真菌的定居情况进行了调查，并对根围土壤中AM真菌进行了分离和鉴定。结果表明，调查根样均有不同程度的菌根感染，感染率最高可达40%，调查揭示了西双版纳地区龙脑香科植物在自然条件下可形成丛枝菌根。初步从龙脑香科植物根际土壤中分离、鉴定出32种AM真菌，隶属于无梗囊霉属（Acaulospora）、球囊霉属（Glomus）、原囊霉属（Achaeospora）、拟球囊霉属（Paraglomus）和盾巨孢囊霉属（Scutellospora），其中，无梗囊霉属和球囊霉属真菌为西双版纳地区龙脑香科植物AM真菌优势类群。 |
| 关 键 词： | AM真菌 龙脑香科 菌根感染率 孢子密度 丰度 |
| 修稿时间： | 2002年4月17日 |
PRELIMINARY RESEARCH ON ARBUSCULAR MYCORRHIZAL FUNGI OF DIPTEROCARPACEAE IN XISHUANGBANNA, SOUTHERN YUNNAN |
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| SHI Zhao_Yong , CHEN Ying_Long LIU Run_Jin and WANG Wei_Hua.PRELIMINARY RESEARCH ON ARBUSCULAR MYCORRHIZAL FUNGI OF DIPTEROCARPACEAE IN XISHUANGBANNA, SOUTHERN YUNNAN[J].Acta Phytoecologica Sinica,2003,27(3):360-365. | |
| Authors: | SHI Zhao_Yong CHEN Ying_Long LIU Run_Jin and WANG Wei_Hua |
| Affiliation: | SHI Zhao_Yong 1,2 CHEN Ying_Long 1 LIU Run_Jin 2 and WANG Wei_Hua 2 |
| Abstract: | In order to investigate the status of arbuscular mycorrhizae (AM) intropical dipterocarpaceae forest, rhizospheric soil with roots of seventeen species of dipterocarpaceae plants grown in both native forests and plantations in tropical region Xishuangbanna, Yunnan Province, were sampled to determine their mycorrhizal colonization, spore density, isolation frequency, relative abundance and species richness of AM fungi. The mycorrhizal colonization rate of host plants were measured under a BX50 Olympus Microscope with Automatic Photo Micrographic System (320-640×) after staining with 0.5% acid fuchsin. Spores of AM fungi in aliquots (20 ml) of each soil were isolated by wet-sieving decanting and cane sugar centrifugal method, hich were used to identify according to the newest taxonomic system described byMorton and Redecker (2001). Species richness was measured as the number of species compared with the number of individuals in the community. Results showed that most roots collected were colonized by AM fungi, typical arbuscules and vesicles were formed with various colonization rates (up to 40%, grade VIII), and 0-1.86 vesicles per mm root length. Species richness on Parashorea chinensis was the highest (4.31),while Shorea assamica showed the lowest (1.63). Hopea mollissima gave the maximum spore density (7.76), Vatica astrotricha the minimal (3.09). Thirty_two AM fungal species belonging to the genera Acaulospora, Glomus, Paraglomus, Achaeospora and Scutellospora were identified. The frequencies and relative abundances of AM fungi varied. Acaulospora and Glomus were likely the dominant proportion in the rhizospheric soil of dipterocarpus plants in the tropical region. It was suggested that most dipterocarpus plants can form typical AM and there was high species diversity of AM fungi in tropical dipterocarpaceae forest. The functional role of these AM fungi in the physiology of dipterocarpus plants needs further research. |
| Keywords: | Dipterocarpaceae Arbuscular mycorrhizae Colonization status Spore density Species richness |
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