虎榛子外生菌根合成与筛选的研究

在实验室条件下，对虎榛子幼苗接种5种外生菌根真菌(6个菌株)。通过对接种幼苗菌根形态观察，以及菌根感染率、生物量的测定，结果表明，接种这些外生菌根真菌后虎榛子均能形成菌根，菌根感染率最低可达40．8％以上，对照无菌根感染现象。并且这些菌种能够明显促进虎榛子的生长，其中卷边桩菇对虎榛子促生效果最佳，生物量为对照的2．1倍。通过对菌根石蜡切片观察，接种处理在皮层细胞问均能形成典型的哈蒂氏网结构，不同菌种哈蒂氏网结构有一定的差异，未接种的苗木无哈蒂氏网形成。

The Search of Synthesizing and Screening out Outstanding Ostryopsis davidiana Ectomycorrhizal

In the laboratory, Ostryopsis davidiana was inoculated with five different species of ectomycorrhiza fungi. Through observing the ectomycorrhizal shape of inoculated seedings and measuring the biomass and infectious ratio of ectomycorrhiza, results show that all the inoculated seedings formed ectomycorrhiza except for the contrast and that infectious ratios excessed 40.8%. All kinds of fungus could obviously promote the growth of seedings after colonizing seedings.The Paxillus involutus is the best one and the biomass of seedings was 2.1 times than that of the contrast. According to the shapes of the formed ectomycorrhiza,ectomycorrhiza shape of Suillus granulatus and Paxillus involutus were yellowy or brown and ungual or sticky.That Pisolithus tinctorius was brown or blank-brown and sticky.That two strains of Suillus grevillei are most yellowy and translucent and sticky or pinnated. And that the Cenococcun geophilum was blank and seemed bulb.Through observing of ectomycorrhizal paraffin section, the seedings inoculated ectomycorrhizal fungi could form typical hartig net and different fungi inoculating seedings had definite discrepancy in hartig net.The seedings which were not inoculated didn't form hartig net.