Abstract
Anoxia was imposed on 4–6-d-old, intact wheat seedlings, after the roots had first been exposed for 1 d to O2 concentrations between 0·016 and 0·06 mol m−3. Apices of the main axis of the seminal roots were considered to have tolerated anoxia if elongation occurred after return from anoxia to air, hereafter called ‘retention of elongation potential’. During anoxia, elongation potential was retained longer in roots of intact seedlings than in 0–5 mm excised root tips supplied with 50 mol m−3 glucose. In intact seedlings, elongation potential was retained longer at 15°C than at 25°C, and at pH 50 and 60 than at pH 40. These differences between treatments were maintained in the presence of exogenous glucose, and glucose supply prolonged the retention of elongation potential in all anoxic treatments. Elongation potential was retained much longer at very low 02 concentrations (0006 to 00l mol m−3) than under anoxia; this was established at pH 40. Anoxia inhibited the transport of sugars from the shoots and/or endosperm to the root by 79-97%, as assessed from experiments with roots of intact plants exposed to anoxia at pH 60 and 15 °C. Overall, the results demonstrate: (i) that the occurrence of adverse effects of anoxia during waterlogging in the field may interact with other environmental factors and (ii) that there are pronounced difficulties integrating data on tolerance to anoxia obtained in different laboratories.
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Claims 7
Claim · model-written summary
Root elongation potential persisted longer in intact wheat seedlings than excised tips during anoxia.
- Taxon
- Wheat
Triticum aestivumt0 - Treatment
- intact seedlingse0
- Outcome
- elongation potentiale0
- Direction
- retained longere0
- Qualifier
- During anoxiae0
- Comparator
- 0–5 mm excised root tipse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“During anoxia, elongation potential was retained longer in roots of intact seedlings than in 0–5 mm excised root tips supplied with 50 mol m−3 glucose.”
Claim · model-written summary
Wheat root elongation potential persisted longer at 15°C than 25°C.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- 15°Ce0
- Outcome
- elongation potentiale0
- Direction
- retained longere0
- Comparator
- 25°Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“In intact seedlings, elongation potential was retained longer at 15°C than at 25°C, and at pH 50 and 60 than at pH 40.”
Claim · model-written summary
Wheat root elongation potential persisted longer at pH 50 and 60 than pH 40.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- pH 50 and 60e0
- Outcome
- elongation potentiale0
- Direction
- retained longere0
- Comparator
- pH 40e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“In intact seedlings, elongation potential was retained longer at 15°C than at 25°C, and at pH 50 and 60 than at pH 40.”
Claim · model-written summary
The temperature and pH differences persisted with exogenous glucose.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- differences between treatments were maintainede0
- Qualifier
- presence of exogenous glucosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“These differences between treatments were maintained in the presence of exogenous glucose, and glucose supply prolonged the retention of elongation potential in all anoxic treatments.”
Claim · model-written summary
Glucose prolonged wheat root elongation potential under all anoxic treatments.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- glucose supplye0
- Outcome
- retention of elongation potentiale0
- Direction
- prolongede0
- Qualifier
- all anoxic treatmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“glucose supply prolonged the retention of elongation potential in all anoxic treatments.”
Claim · model-written summary
Very low oxygen allowed longer elongation potential retention than anoxia at pH 40.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- very low 02 concentrations (0006 to 00l mol m−3)e0
- Outcome
- Elongation potentiale0
- Direction
- retained much longere0
- Qualifier
- pH 40e0
- Comparator
- anoxiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Elongation potential was retained much longer at very low 02 concentrations (0006 to 00l mol m−3) than under anoxia; this was established at pH 40.”
Claim · model-written summary
Anoxia inhibited sugar transport from shoot or endosperm to wheat root by 79-97%.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Anoxiae0
- Outcome
- transport of sugars from the shoots and/or endosperm to the roote0
- Direction
- inhibitede0
- Value
- 79-97%e0
- Qualifier
- pH 60 and 15 °Ce0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Anoxia inhibited the transport of sugars from the shoots and/or endosperm to the root by 79-97%, as assessed from experiments with roots of intact plants exposed to anoxia at pH 60 and 15 °C.”
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See all 30 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.