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Growth, denitrification and nitrate ammonification of the rhizobial strain TNAU 14 in presence and absence Of C2H4 and C2H2
ANNALS OF MICROBIOLOGY, 57(4): 509-514, 2007.
| Authors: | Gero Benckiser |
| Tags: | C2H2 C2H4 N-2-fixation N2O-release denitrification nitrate_ammonification rhizobial_growth |
| Abstract: | Soil-N (NO3-) initiates as far as a threshold concentration is surpassed manifold physiological reactions on N-2-fixation. Organic N and ammonium oxidised to NO3- means oxygen depletion. Plants suffering under O-2 or infection stress start to excrete ethylene (C2H4), C2H4 widens the root intercellulars that O-2-respiration will continue. Now microbes may more easily enter the plant interior by transforming the reached methionine into C2H4. Surplus nitrate and C2H4 inhibit nodulation of leguminous plants. Excess NO3 in the nodulesphere could be diminished by N-2-fixing bacteria which in addition can denitrify or ammonify nitrate. Consequently, it was asked whether CA interferes with the potential of N-2-fixing bacteria to reduce nitrate. The groundnut-nodule isolate TNAU 14, from which it was known that it denitrifies and ammonifies nitrate, served as inoculum of a KNO3-mannitol-medium that was incubated under N-2(-), 1% (v/v) N-2-C2H4-, and 1% (v/v) N-2-C2H2-atmosphere in the laborator |
| BibTeX
@article{ISI:000252648000005,
title = {Growth, denitrification and nitrate ammonification of the rhizobial strain TNAU 14 in presence and absence Of C2H4 and C2H2},
author = {Gero Benckiser},
journal = {ANNALS OF MICROBIOLOGY},
number = {4},
pages = {509-514},
volume = {57},
year = {2007},
abstract = {Soil-N (NO3-) initiates as far as a threshold concentration is surpassed manifold physiological reactions on N-2-fixation. Organic N and ammonium oxidised to NO3- means oxygen depletion. Plants suffering under O-2 or infection stress start to excrete ethylene (C2H4), C2H4 widens the root intercellulars that O-2-respiration will continue. Now microbes may more easily enter the plant interior by transforming the reached methionine into C2H4. Surplus nitrate and C2H4 inhibit nodulation of leguminous plants. Excess NO3 in the nodulesphere could be diminished by N-2-fixing bacteria which in addition can denitrify or ammonify nitrate. Consequently, it was asked whether CA interferes with the potential of N-2-fixing bacteria to reduce nitrate. The groundnut-nodule isolate TNAU 14, from which it was known that it denitrifies and ammonifies nitrate, served as inoculum of a KNO3-mannitol-medium that was incubated under N-2(-), 1% (v/v) N-2-C2H4-, and 1% (v/v) N-2-C2H2-atmosphere in the laborator},
issn = {1590-4261},
keywords = {C2H2 C2H4 N-2-fixation N2O-release denitrification nitrate_ammonification rhizobial_growth }
}
author = {Gero Benckiser},
journal = {ANNALS OF MICROBIOLOGY},
number = {4},
pages = {509-514},
volume = {57},
year = {2007},
abstract = {Soil-N (NO3-) initiates as far as a threshold concentration is surpassed manifold physiological reactions on N-2-fixation. Organic N and ammonium oxidised to NO3- means oxygen depletion. Plants suffering under O-2 or infection stress start to excrete ethylene (C2H4), C2H4 widens the root intercellulars that O-2-respiration will continue. Now microbes may more easily enter the plant interior by transforming the reached methionine into C2H4. Surplus nitrate and C2H4 inhibit nodulation of leguminous plants. Excess NO3 in the nodulesphere could be diminished by N-2-fixing bacteria which in addition can denitrify or ammonify nitrate. Consequently, it was asked whether CA interferes with the potential of N-2-fixing bacteria to reduce nitrate. The groundnut-nodule isolate TNAU 14, from which it was known that it denitrifies and ammonifies nitrate, served as inoculum of a KNO3-mannitol-medium that was incubated under N-2(-), 1% (v/v) N-2-C2H4-, and 1% (v/v) N-2-C2H2-atmosphere in the laborator},
issn = {1590-4261},
keywords = {C2H2 C2H4 N-2-fixation N2O-release denitrification nitrate_ammonification rhizobial_growth }