Authors: Liu Zhao XiaoQin Wu JianRen Ye Hao Li GuiE Li
Publish Date: 2013/11/13
Volume: 50, Issue: 4, Pages: 593-601
Abstract
If mycorrhizal formation could be enhanced by coinoculation with mycorrhiza helper bacteria MHB which promote rapid root colonization by specific ectomycorrhizal fungi this would be of advantage to the poplar forest industry A number of poplar rhizobacterial strains were isolated from 11 regions of the eastern China Four of the isolates SY15 DZ18 HLJ4 and PY10 were characterized as MHB potential strains based on their positive effect on growth of ectomycorrhizal fungi Pisolithus tinctorius Pers and Lactarius insulsus Fr Under greenhouse conditions one of the bacterial isolate DZ18 significantly promoted the poplar trees growth and ectomycorrhizal colonization of P tinctorius and L insulsus on Populus deltoides Marsh In contrast the other three isolates SY15 HLJ4 and PY10 promoted fungal growth in vitro experiments but did not enhance ectomycorrhizal ECM formation in the greenhouse experiment Therefore it was concluded that DZ18 can be considered as an MHB strain DZ18 was identified as Bacillus sp based on morphological physiological and biochemical analyses in combination with analysis of 16S rDNA gene sequences
Keywords: