Nitrification and denitrification in the rhizosphere of rice: the detection of processes by a new multi-channel electrode

Arth, Inko; Frenzel, Peter

doi:10.1007/s003749900190

Cited by 80 publications

(81 citation statements)

References 37 publications

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“…The loss of N by coupled nitrifi cation-denitrifi cation is usually limited by the formation of NO 3 − , and the supply of NO 3 − can consequently control the size and activity of denitrifi ers. The rhizosphere of rice, in addition to the aerobic surface soil layer, is a potentially important site for coupled nitrifi cation-denitrifi cation (Arth et al, 1998;Arth and Frenzel, 2000). The loss of ammonium N through coupled nitrifi cation-denitrifi cation cannot occur in the absence of an aerobic zone.…”

Section: Nitrifi Cation-denitrifi Cationmentioning

confidence: 99%

Nitrogen Transformations in Submerged Soils

Buresh

Reddy

Kessel

2015

Agronomy Monographs

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Soils with continuous or intermitt ent submergence by water are widely distributed worldwide. They occur in a range of ecosystems including rice (Oryza sativa L.) fi elds, wetlands, estuaries, and fl oodplains. Such ecosystems oft en occur at low elevation in the landscape and are poorly drained with high retention of water. In addition, some upland areas with poor drainage can undergo periodic submergence and soil saturation. Moreover, the sediments in ocean, lake, and stream bottoms have similar biogeochemical and physical characteristics and N transformations as submerged agricultural soils.Rice fi elds surrounded by earthen levees to retain rain and irrigation water and ensure soil submergence are one of the world's major agricultural ecosystems. Rice is a staple food for nearly half the world's population, and about 95% of the global rice production occurs on fi elds with soil submerged during at least part of the rice-cropping period. The sustained productivity of this rice ecosystem, which ensures production of suffi cient food for a growing world population, relies heavily on the input and management of N.Nitrogen transformations in submerged soils are markedly diff erent from those in drained, aerated soils. These diff erences aff ect the prevalent soil microorganisms and microbial activities and the turnover, availabilility, and losses of N. To deal with the diff erences in N transformations between submerged and drained soils it is necessary to understand the biogeochemical conditions existing in submerged soils. This chapter is an update of an earlier review by Patrick (1982).

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Section: Nitrifi Cation-denitrifi Cationmentioning

confidence: 99%

Nitrogen Transformations in Submerged Soils

Buresh

Reddy

Kessel

2015

Agronomy Monographs

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“…From the mean CH 4 depletion curves for the three parallel samples from one microcosm, two linear regressions were calculated. The first regression described the initial CH 4 oxidation, which corresponded to the CH 4 depletion at the beginning of the measurements until the onset of fast (induced) CH 4 oxidation. The second regression described the fast (induced) CH 4 oxidation period.…”

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confidence: 99%

“…Graham et al (21), for example, have shown that Methylosinus trichosporium outcompetes Methylomonas albus in chemostat cultures under N-limiting conditions. Amaral and Knowles (2) found that in CH 4 -O 2 countergradients members of the Methylococcaceae grow preferentially at low CH 4 concentrations and members of the Methylocystaceae grow preferentially at high CH 4 concentrations. In the complex rice field ecosystem temporal and spatial changes in the microbial environment occur and might result in shifts in the methanotrophic community, which could influence overall CH 4 oxidation activity.…”

mentioning

confidence: 99%

“…It is thought that due to the demands of the growing human population, cultivation of wetland rice will increase during the next 3 decades by 60% (14). Therefore, a reduction in CH 4 emission from this source due to microbial CH 4 oxidation could play an increasingly important role in the global CH 4 budget.…”

mentioning

confidence: 99%

“…A better understanding of the methanotrophic community structure in rice fields is therefore important to understand this dynamic ecosystem. It could also facilitate future attempts to activate or affect CH 4 oxidation in this or other systems with the aim of reducing CH 4 emission. A combination of process measurements and molecular community analysis was used in this study to compare community structure and actual activity of methanotrophs.…”

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confidence: 99%

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Changes in Activity and Community Structure of Methane-Oxidizing Bacteria over the Growth Period of Rice

Eller

Frenzel

2001

Appl Environ Microbiol

161

158

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The activity and community structure of methanotrophs in compartmented microcosms were investigated over the growth period of rice plants. In situ methane oxidation was important only during the vegetative growth phase of the plants and later became negligible. The in situ activity was not directly correlated with methanotrophic cell counts, which increased even after the decrease in in situ activity, possibly due to the presence of both vegetative cells and resting stages. By dividing the microcosms into two soil and two root compartments it was possible to locate methanotrophic growth and activity, which was greatest in the rhizoplane of the rice plants. Molecular analysis by denaturing gradient gel electrophoresis and fluorescent in situ hybridization (FISH) with family-specific probes revealed the presence of both families of methanotrophs in soil and root compartments over the whole season. Changes in community structure were detected only for members of the Methylococcaceae and could be associated only with changes in the genus Methylobacter and not with changes in the dominance of different genera in the family Methylococcaceae. For the family Methylocystaceae stable communities in all compartments for the whole season were observed. FISH analysis revealed evidence of in situ dominance of the Methylocystaceae in all compartments. The numbers of Methylococcaceae cells were relatively high only in the rhizoplane, demonstrating the importance of rice roots for growth and maintenance of methanotrophic diversity in the soil.Wetland rice fields are an important source of the greenhouse gas CH 4 . They contribute up to 20% (20 to 50 Tg year Ϫ1

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Flooded Soils

Conrad

Frenzel

2003

Encyclopedia of Environmental Microbiology

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Biogeochemical Cycling Anaerobic Degradation of Organic Matter to Methane Microbial Oxidation of Methane Microbial Cycling of Oxidants Isotope Effects Competition Among Microorganisms Interaction Between Microorganisms and Plants

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Nitrification and denitrification in the rhizosphere of rice: the detection of processes by a new multi-channel electrode

Cited by 80 publications

References 37 publications

Nitrogen Transformations in Submerged Soils

Nitrogen Transformations in Submerged Soils

Changes in Activity and Community Structure of Methane-Oxidizing Bacteria over the Growth Period of Rice

Flooded Soils

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