@article{fdi:010054316,
  title = {{C}asuarina root exudates alter the physiology, surface properties, and plant infectivity of {F}rankia sp {S}train {C}c{I}3},
  author = {{B}eauchemin, {N}.{J}. and {F}urnholm, {T}. and {L}avenus, {J}. and {S}vistoonoff, {S}ergio and {D}oumas, {P}atrick and {B}ogusz, {D}idier and {L}aplaze, {L}aurent and {T}isa, {L}.{S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he actinomycete genus {F}rankia forms nitrogen-fixing symbioses with 8 different families of actinorhizal plants, representing more than 200 different species. {V}ery little is known about the initial molecular interactions between {F}rankia and host plants in the rhizosphere. {R}oot exudates are important in {R}hizobium-legume symbiosis, especially for initiating {N}od factor synthesis. {W}e measured differences in {F}rankia physiology after exposure to host aqueous root exudates to assess their effects on actinorhizal symbioses. {C}asuarina cunninghamiana root exudates were collected from plants under nitrogen-sufficient and -deficient conditions and tested on {F}rankia sp. strain {C}c{I}3. {R}oot exudates increased the growth yield of {F}rankia in the presence of a carbon source, but {F}rankia was unable to use the root exudates as a sole carbon or energy source. {E}xposure to root exudates caused hyphal "curling" in {F}rankia cells, suggesting a chemotrophic response or surface property change. {E}xposure to root exudates altered {C}ongo red dye binding, which indicated changes in the bacterial surface properties at the fatty acid level. {F}ourier transform infrared spectroscopy ({FTIR}) confirmed fatty acid changes and revealed further carbohydrate changes. {F}rankia cells preexposed to {C}. cunninghamiana root exudates for 6 days formed nodules on the host plant significantly earlier than control cells. {T}hese data support the hypothesis of early chemical signaling between actinorhizal host plants and {F}rankia in the rhizosphere.},
  keywords = {{CONGO}},
  booktitle = {},
  journal = {{A}pplied and {E}nvironmental {M}icrobiology},
  volume = {78},
  numero = {2},
  pages = {575--580},
  ISSN = {0099-2240},
  year = {2012},
  DOI = {10.1128/aem.06183-11},
  URL = {https://www.documentation.ird.fr/hor/fdi:010054316},
}