利用盆栽试验研究了三叶草(Trifolium repens L.)、黑麦草(Lolium perenne L.)、玉米(Zea mays L.)和高粱(Sorghum vulgare Pets.)4种宿主植物对黄芩(Scutellaria baicalensis Georgi.)根际土著丛枝菌根(AM)真菌生长发育的影响.结果表明,4种供试植物都能与AM真菌形成共生关系,但不同宿主植物对黄芩AM真菌生长发育的影响不同.玉米作为宿主时,黄芩AM真菌的孢子密度、菌根侵染率、根内菌丝琥珀酸脱氢酶活性、菌根长度分别为8.03个/g、93.33％、51.10％、9.67cm,土壤易提取球囊霉素和总球囊霉素含量分别为0.46 mg/g和1.06 mg/g,均高于其他3种寄主植物,说明以玉米作为宿主植物对黄芩根际土著AM真菌生长最为有利.相关性分析结果表明,黄芩AM真菌孢子密度与宿主地下部可溶性糖含量呈显著正相关,土壤总球囊霉素含量与真菌孢子密度和菌根侵染率呈极显著正相关.说明宿主植物地下部可溶性糖含量对AM真菌孢子的形成有显著影响,土壤总球囊霉素含量可作为评价AM真菌生长发育的参考指标.%The effects of different host plants (Trifolium repens ,Lolium perenne ,Zea mays and Sorghum vulgare) on growth and development of arbuscular mycorrhizal (AM) fungi in the rhi-zospere of Scutellaria baicalensis were studied under sterilized conditions using pot experiment. The results showed that four kinds of plants could form symbiotic relationships with AM fungi, but the fungus characteristics and states of different host plants had significant difference. When Z.mays was used as host plant, the spore density, mycorrhizal colonization rate, succinate dehy-drogenase activity of intraradical hypha and mycorrhizal length of AM fungi were 8. 03 per gram soil,93. 33%,51. 10%,9. 67 cm, respectively. The easily extractable glomalin (EEG) and total ex-tractable glomalin (TEG) of soil were 0. 46mg/g and 1. 06 mg/g,which were higher than those of other three plants. The Z. Mays was the best host plant for the growth and development of indigenous AM fungi in the rhizosphere of S. Baicalensis. Correlation analysis showed that the spore density of AM fungi was positively correlated with the soluble sugar in host root (P<0. 05) , and TEG had positive relationship with the spore density and mycorrhizal colonization rate (P < 0. 01). The results suggested that the soluble sugar in host root greatly influenced sporulation,and TEG might be a useful index to evaluate the growth and development of AM fungi.
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