碳源和氮源对桑黄菌丝(Phellinus liteus)生长的影响

研究了影响桑黄菌丝生长的碳源和氮源。结果表明，桑黄菌丝生长的最适碳源是蔗糖，最适氮源是蛋白胨。     

七个桑黄菌株酯酶同工酶的研究

选取7个均称为桑黄的不同形态的子实体,对子实体分离后得到的纯化菌丝体进行酯酶同工酶研究。结果表明,所有菌株在Rf=0.805处出现一条稳定一致的共有酶带,而桑6和桑7具有较近的亲缘关系,其它菌株间的亲缘关系较远或者没有。     

Occurrence of brown root rot in Ocean Expo Park,Okinawa, Japan: Infection route and preventive control measures

Ocean Expo Park, established in 1976 on subtropical Okinawa Island, Japan, has approximately 8000 planted or naturally grown trees in an area of 77.2 ha. Windfall of these trees occurs mainly due to typhoons; wood chips made from the trunks and roots of windfall trees are commonly used as mulching material throughout the park areas, despite possible infection by pathogenic fungi such as Phellinus noxius, the pathogen causing brown root rot. P. noxius is distributed in tropical and subtropical areas worldwide and has a broad host range. The fungus can infect host plants with mycelia via root-to-root contact or with basidiospores. Here, we report the current status of tree damage caused by brown root rot in the park and infer the infection routes of P. noxius based on microsatellite markers. Among a total of 294 trees surveyed in the park, P. noxius was isolated from 13 trees of five species. P. noxius was observed more frequently on Ficus microcarpa than on other tree species. Ficus superba var. japonica was identified as a new host species, and Bombax ceiba was first recorded as a host plant of P. noxius in Japan. Among the 13 P. noxius isolates from the diseased trees, 2 isolates from adjacent diseased trees were considered to be of the same genet, while the other 11 isolates were different genets, indicating that infection by basidiospores occurred frequently among trees in the entire park, although spread via root systems also occurred between at least two adjacent trees. An identical genet was not detected at distant locations, which suggests that the disease does not spread via chips. However, mulching with chips can lead to wood decay due to decaying fungi other than P. noxius. Therefore, in accordance with the precautionary principle, the park currently prohibits the chipping and mulching of windfall or damaged trees and is considering disposal methods such as burning.     

山西省药用真菌松木层孔菌资源及其功效

探讨了松木层孔菌的形态特征与功效,介绍其相关研究与相关记载,以促进该资源的利用。     

药用真菌桑黄的研究进展

桑黄(Phellinus spp.)是一类具有药用价值的大型真菌,其中以野生的桑树(Morus L.)桑黄最为珍贵。综述了国内外在桑黄的分类学地位、形态特征、地理分布、人工培养方法研究,以及药理活性物质的组成、提取与分离纯化、药理作用机制等方面的研究进展,探讨了该研究领域存在的问题及今后的研究方向。     

桑黄液体发酵培养基优化的初步研究

实验研究了桑黄液体发酵培养基中不同营养组成对桑黄菌丝生长的影响。以菌丝生物量和多糖产量为主要指标,对桑黄液体发酵培养基进行了优化。通过单因素试验和正交试验筛选出了桑黄液体发酵的最佳培养基。单因素试验结果表明最适氮源为麦麸,最佳碳氮比为20:1;正交试验结果表明,优化培养基配方为玉米粉50g·L-1、麦麸50g·L-1、KH2PO42g·L-1、MgSO41g·L-1、VB1300μg·L-1、VB2400μg·L-1。