Claim · model-written summary
Nitrate reductase and nitrite reductase activities increased up to 12 d in chilled and nonchilled Azolla caroliniana, then decreased.
- Taxon
- Azolla caroliniana
Azolla carolinianae0 - Outcome
- Nitrate reductase and nitrite reductase activitiese1
- Direction
- increasede2
- Qualifier
- up to 12 de2
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Azolla caroliniana”
e1“Nitrate reductase and nitrite reductase activities in control plants were higher than in those previously chilled for 7 d”
e2“Both activities increased in nonchilled and previously chilled plants up to 12 d then decreased”
Title
Effect of chilling on growth and nitrogen assimilation in Azolla caroliniana
E. M. Mostafa; A. M. A. Hassan Biologia Plantarum 2006. doi:10.1007/s10535-006-0100-7
Other claims from this paper (12)
- Intervention effect Azolla caroliniana chilled for 2 or 3 d and then transferred to normal temperature grew faster than control plants.
- Intervention effect Previous chilling decreased the growth rate of Azolla caroliniana.
- Intervention effect Nitrogen supplementation increased the growth rate of chilled and nonchilled Azolla caroliniana relative to N-free medium.
- Association In the first 4 d of recovery, the N2-fixation rate of nonchilled Azolla caroliniana was about 4-fold that of previously chilled plants.
- Observation During recovery, N2-fixation rate increased in both chilled and nonchilled Azolla caroliniana up to 12 d, after which both rates were similar.
- Intervention effect Nitrate reductase and nitrite reductase activities in control Azolla caroliniana were higher than in plants chilled for 7 d.
- Observation Total protein content of chilled and nonchilled Azolla caroliniana increased up to 12 d, then decreased.
- Intervention effect Under all treatments, the values were higher in nonchilled than in previously chilled Azolla caroliniana.
- Intervention effect Under all treatments, the values were higher with N-source than without it in Azolla caroliniana.
- Association The N-source in the medium counteracts the effect of chilling injury on Azolla caroliniana, particularly during prolonged recovery.
- Mechanism Increased plant growth in Azolla caroliniana may be related to increased chlorophyll, sucrose and reducing sugar contents from increased photosynthetic capacity.
- Mechanism The decrease in growth rate of chilled Azolla caroliniana may be related to disturbance of Anabaena azollae cells.