Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1111/j.1469-8137.2007.02191.x
Title (Primary) The mycorrhiza helper bacteria revisited
Author Frey-Klett, P.; Garbaye, J.; Tarkka, M.
Source Titel New Phytologist
Year 2007
Department BOOEK
Volume 176
Issue 1
Page From 22
Page To 36
Language englisch
Keywords fungal-bacterial interaction; mycorrhizal symbiosis
Abstract In natural conditions, mycorrhizal fungi are surrounded by complex microbial communities, which modulate the mycorrhizal symbiosis. Here, the focus is on the so-called 'mycorrhiza helper bacteria' (MHB). This concept is revisited, and the distinction is made between the helper bacteria, which assist mycorrhiza formation, and those that interact positively with the functioning of the symbiosis. After considering some examples of MHB from the literature, the ecological and evolutionary implications of the relationships of MHB with mycorrhizal fungi are discussed. The question of the specificity of the MHB effect is addressed, and an assessment is made of progress in understanding the mechanisms of the MHB effect, which has been made possible through the development of genomics. Finally, clear evidence is presented suggesting that some MHB promote the functioning of the mycorrhizal symbiosis. This is illustrated for three critical functions of practical significance: nutrient mobilization from soil minerals, fixation of atmospheric nitrogen, and protection of plants against root pathogens. The review concludes with discussion of future research priorities regarding the potentially very fruitful concept of MHB.
Persistent UFZ Identifier
Frey-Klett, P., Garbaye, J., Tarkka, M. (2007):
The mycorrhiza helper bacteria revisited
New Phytol. 176 (1), 22 - 36 10.1111/j.1469-8137.2007.02191.x