@article{fdi:010025486,
  title = {{D}ifferences in nitrogen metabolism of {F}aidherbia albida and other {N}2-fixing tropical woody acacias reflect habitat water availability},
  author = {{C}ampa, {C}laudine and {D}iouf, {D}. and {N}doye, {I}. and {D}reyfus, {B}ernard},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he activities of nitrate reductase and glutamine synthetase were evaluated in young plants of #{F}aidherbia albida$, a tropical woody legume, fed with different {N} sources under hydroponic conditions. {R}esults showed that assimilation of both {NO}3- and {NH}4+ preferentially took place in shoots. {A} basal amount of nitrate reductase activity was detected in shoots of plants grown with an {NO}3- free solution or placed under {N}2-fixing conditions, and also in nodules of {N}2-fixing plants. {T}his strongly suggests that constitutive nitrate reductase activity is present in these organs. {A}nalyses of the soluble nitrogenous content showed that the major form of {N} in the different organs was alpha-amino acids (particularly amides), irrespective of the {N} status of the culture conditions. {T}he same result was obtained for nodulated plants grown in local sandy soil. {I}n this case, amide-{N} generally counted for more than 40% of the total soluble {N}. {T}his was especially true in nodules. {U}reide-{N} never exceeded 9% of the total soluble {N} and did not appear to increase with increasing nodule nitrogenase activity. {A}mides were also predominant in three {N}2-fixing {S}ahelian acacias (#{A}cacia seyal$, #{A}. nilotica$ and #{A}. tortilis$), showing that #{F}. albida$ does not differ from {S}ahelian #{A}cacia$ in terms of the metabolism of fixed {N}. {H}owever, like another {S}ahelian acacia growing preferentially near water (#{A}. nilotica$), #{F}. albida$ can be distinguished from acacias growing strictly in arid zones (#{A}. seyal$ and #{A}. tortilis$) in terms of initial growth, water and nitrate management. ({R}{\'e}sum{\'e} d'auteur)},
  keywords = {{LEGUMINEUSE} {TROPICALE} ; {FIXATION} {BIOLOGIQUE} {DE} {L}'{AZOTE} ; {MYCORHIZE} ; {METABOLISME} ; {ENZYME} ; {BESOIN} {EN} {EAU} ; {ETUDE} {COMPARATIVE} ; {NITRATE} {REDUCTASE} ; {GLUTAMINE} {SYNTHETASE} ; {ZONE} {ARIDE} ; {ZONE} {SEMIARIDE}},
  booktitle = {},
  journal = {{N}ew {P}hytologist},
  volume = {147},
  numero = {},
  pages = {571--578},
  ISSN = {0028-646{X}},
  year = {2000},
  DOI = {10.1046/j.1469-8137.2000.00714.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010025486},
}