Claim · model-written summary
Root growth was equally impaired at 0.06 and 0.02 mol O 2 m −3.
- Treatment
- 0.06e1
- Outcome
- Root growthe1
- Direction
- impaired just as severelye1
- Comparator
- 0.02 mol O 2 m −3e1
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings of Zea mays L.”
e1“Root growth was impaired just as severely at 0.06 as 0.02 mol O 2 m −3”
Title
A study of the impaired growth of roots of Zea mays seedlings at low oxygen concentrations
B. J. ATWELL; C. J. THOMSON; H. GREENWAY; et al. Plant Cell & Environment 1985. doi:10.1111/1365-3040.ep11604603
Other claims from this paper (12)
- Intervention effect Root growth at 0.16 mol O 2 m −3 was similar to growth in air-equilibrated solution.
- Intervention effect Low oxygen inhibited growth equally in nutrient solution and dilute calcium chloride solution.
- Intervention effect At low oxygen, 100% shoot humidity did not enhance root growth relative to 50% humidity.
- Intervention effect At low oxygen, shoot excision did not enhance root growth relative to intact shoots at 50% humidity.
- Intervention effect Total soluble sugars were generally greater at low than high oxygen, particularly in apical and expanding root tissues.
- Intervention effect Amino acid concentrations were generally greater at low than high oxygen in root apices and expanding tissue.
- Intervention effect In some experiments, expanding-tissue sugars were slightly greater at high oxygen.
- Observation Critical oxygen pressure for respiration in expanding root segments was approximately 0.117 mol O 2 m −3.
- Observation Critical oxygen pressure for respiration in expanded root segments was approximately 0.065 mol O 2 m −3.
- Observation Critical oxygen pressure in the apex exceeded 0.20 mol O 2 m −3.
- Mechanism The authors inferred that oxygen supply to metabolic processes was most likely suboptimal in root apices.
- Mechanism The authors concluded that low ATP regeneration in growing roots caused impaired growth under low oxygen.