The mycorrhiza helper bacteria revisited

摘要: Contents Summary 22 I. Introduction 23 II. Evidence for the occurrence of MHB 23 III. Ecological and evolutionary implications MHB 23 IV. The question MHB specificity 27 V. Mechanisms effect 28 VI. Role in mycorrhizal functions 31 VII. Conclusions research priorities 32 References  33 Summary In natural conditions, fungi are surrounded by complex microbial communities, which modulate symbiosis. Here, focus is on so-called ‘mycorrhiza helper bacteria’ (MHB). This concept revisited, distinction made between bacteria, assist mycorrhiza formation, those that interact positively with functioning After considering some examples from literature, ecological relationships discussed. The specificity effect addressed, an assessment progress understanding mechanisms effect, has been possible through development genomics. Finally, clear evidence presented suggesting promote illustrated three critical functions practical significance: nutrient mobilization soil minerals, fixation atmospheric nitrogen, protection plants against root pathogens. review concludes discussion future priorities regarding potentially very fruitful MHB.