Abstract
S ummary When the soil in which 13‐day‐old barley plants were growing was flooded, the concentration of dissolved oxygen in the waterlogged soil declined to < 2 % (in the equilibrium gaseous phase) within 48 h. Within the same time there was injury to seminal roots and a reduction in the rate of leaf extension. The net rates of uptake of nitrogen, phosphate and potassium in shoots were reduced shortly after the onset of waterlogging, and because dry matter accumulation by shoots was initially little affected, the average concentration of these nutrients showed a marked decline after 48 h compared with aerated controls. The concentration of nitrate in shoots was particularly sensitive to waterlogging and after 48 h was about one third of that in controls. Analysis of individual leaves and tillers showed that with waterlogging, nitrogen was accumulated by the younger tissues at the expense of the older leaves. This trend, which was not observed with plants in aerobic soil, preceded the premature breakdown of chlorophyll in the older leaves. With prolonged anaerobiosis, there were increases in the concentration of potentially inhibitory soil products (ethylene, organic acids, manganese) and a decline in nitrate in the soil solution, but these changes, which mostly occurred after the onset of the characteristic symptoms of waterlogging damage were relatively small and unlikely to have led to injury to shoots. The possible relations between the low concentration of oxygen around roots, the inhibition of ion uptake, the redistribution of nutrients within the shoot, and the premature senescence of leaves are discussed.
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Claims 9
Claim · model-written summary
Dissolved oxygen in the waterlogged soil declined to below 2% within 48 h.
- Taxon
- barley
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Hordeum vulgaree0 - Outcome
- concentration of dissolved oxygene1
- Direction
- declinede1
- Value
- < 2 %e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“barley plants were growing was flooded”
e1“the concentration of dissolved oxygen in the waterlogged soil declined to < 2 % (in the equilibrium gaseous phase) within 48 h”
Claim · model-written summary
Waterlogging caused injury to seminal roots within 48 h.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- seminal rootse2
- Outcome
- injury to seminal rootse2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e2“Within the same time there was injury to seminal roots and a reduction in the rate of leaf extension”
Claim · model-written summary
Waterlogging reduced the rate of leaf extension within 48 h.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- rate of leaf extensione2
- Direction
- reductione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e2“Within the same time there was injury to seminal roots and a reduction in the rate of leaf extension”
Claim · model-written summary
Net uptake rates of nitrogen, phosphate and potassium in shoots were reduced shortly after waterlogging began.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- shootse3
- Treatment
- waterlogginge3
- Outcome
- net rates of uptake of nitrogen, phosphate and potassiume3
- Direction
- reducede3
- Comparator
- aerated controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e3“The net rates of uptake of nitrogen, phosphate and potassium in shoots were reduced shortly after the onset of waterlogging”
e4“compared with aerated controls”
Claim · model-written summary
Shoot nitrate concentration after 48 h of waterlogging was about one third of that in controls.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- shootse4
- Treatment
- waterlogginge4
- Outcome
- concentration of nitrate in shootse4
- Direction
- was particularly sensitivee4
- Value
- about one thirde4
- Comparator
- controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e4“The concentration of nitrate in shoots was particularly sensitive to waterlogging and after 48 h was about one third of that in controls”
Claim · model-written summary
With waterlogging, nitrogen was accumulated by younger tissues at the expense of older leaves.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- younger tissuese5
- Treatment
- waterlogginge5
- Outcome
- nitrogene5
- Direction
- accumulatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e5“Analysis of individual leaves and tillers showed that with waterlogging, nitrogen was accumulated by the younger tissues at the expense of the older leaves”
Claim · model-written summary
The nitrogen redistribution preceded premature breakdown of chlorophyll in the older leaves.
- Taxon
- barleyHordeum vulgaree0
- Organ / stage
- older leavese6
- Outcome
- premature breakdown of chlorophylle6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e6“preceded the premature breakdown of chlorophyll in the older leaves”
Claim · model-written summary
With prolonged anaerobiosis, concentrations of potentially inhibitory soil products increased, though the changes were relatively small.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- prolonged anaerobiosise7
- Outcome
- concentration of potentially inhibitory soil productse7
- Direction
- increasese7
- Qualifier
- relatively small and unlikely to have led to injury to shootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e7“With prolonged anaerobiosis, there were increases in the concentration of potentially inhibitory soil products (ethylene, organic acids, manganese) and a decline in nitrate in the soil solution”
e1“these changes, which mostly occurred after the onset of the characteristic symptoms of waterlogging damage were relatively small and unlikely to have led to injury to shoots”
Claim · model-written summary
Nitrate in the soil solution declined with prolonged anaerobiosis.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- prolonged anaerobiosise7
- Outcome
- nitrate in the soil solutione7
- Direction
- declinee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley plants were growing was flooded”
e7“With prolonged anaerobiosis, there were increases in the concentration of potentially inhibitory soil products (ethylene, organic acids, manganese) and a decline in nitrate in the soil solution”
The same questions in other papers
flooding · nutrient: content · Hordeum vulgare (barley)Results agree
8 papers in the same direction as this paper
- negative
- negative
- negative
5 papers more in this group
See all 9 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.