Abstract
Acetylene reduction by bacteria in the rhizosphere of Glyceria borealis and Typha sp. was studied under anaerobic and aerobic conditions. Under anaerobic conditions, when roots and rhizomes were incubated with rhizosphere sediments at 25 °C without glucose, acetylene reduction to ethylene was calculated to be 37 μmol g −1 day −1 and 3.6 μmol g −1 day −1 for Glyceria and Typha respectively. The rates were generally lower under aerobic conditions. Washed roots (without sediment) also showed high activity. The reduction of acetylene to ethylene had a Q 10 of 4.5 in the Glyceria system. It is estimated that N 2 fixation in the rhizosphere of this species may reach 60 kg ha −1 year −1 .
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Claims 6
Claim · model-written summary
Anaerobic acetylene reduction with Glyceria roots and sediment was 37 μmol g −1 day −1.
GlyceriaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under anaerobic conditions, when roots and rhizomes were incubated with rhizosphere sediments at 25 °C without glucose, acetylene reduction to ethylene was calculated to be 37 μmol g −1 day −1 and 3.6 μmol g −1 day −1 for Glyceria and Typha respectively.”
Claim · model-written summary
Anaerobic acetylene reduction with Typha roots and sediment was 3.6 μmol g −1 day −1.
TyphaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under anaerobic conditions, when roots and rhizomes were incubated with rhizosphere sediments at 25 °C without glucose, acetylene reduction to ethylene was calculated to be 37 μmol g −1 day −1 and 3.6 μmol g −1 day −1 for Glyceria and Typha respectively.”
Claim · model-written summary
Acetylene reduction rates were generally lower under aerobic conditions.
- Taxon
- Glyceria borealis
Glyceria borealise1 - Outcome
- ratese0
- Direction
- lowere0
- Setting
- aerobic conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rates were generally lower under aerobic conditions.”
e1“Acetylene reduction by bacteria in the rhizosphere of Glyceria borealis and Typha sp. was studied under anaerobic and aerobic conditions.”
Claim · model-written summary
Washed roots without sediment showed high acetylene reduction activity.
- Taxon
- Glyceria borealisGlyceria borealise1
- Organ / stage
- Washed rootse0
- Outcome
- high activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Washed roots (without sediment) also showed high activity.”
e1“Acetylene reduction by bacteria in the rhizosphere of Glyceria borealis and Typha sp. was studied under anaerobic and aerobic conditions.”
Claim · model-written summary
The Glyceria acetylene reduction system had a Q10 of 4.5.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction of acetylene to ethylene had a Q 10 of 4.5 in the Glyceria system.”
Claim · model-written summary
Rhizosphere nitrogen fixation in Glyceria was estimated to reach 60 kg ha −1 year −1.
- Taxon
- Glyceria borealisGlyceria borealise1
- Outcome
- N 2 fixatione0
- Value
- 60 kg ha −1 year −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is estimated that N 2 fixation in the rhizosphere of this species may reach 60 kg ha −1 year −1 .”
e1“Acetylene reduction by bacteria in the rhizosphere of Glyceria borealis and Typha sp. was studied under anaerobic and aerobic conditions.”