Abstract
Growth and nutrient relations were examined in healthy leeks and in leeks inoculated with the rust, Puccinia allii, to give three different intensities of infection (i.e. 10, 20 and 30%). Experiments were conducted over an 8-week experimental period, although only data from 5 weeks after inoculation are shown. The dry weights of rust-infected plants were substantially reduced compared with controls over the entire experimental period. Although shoot: root (S: R) ratios were increased in rusted plants 2 weeks after inoculation, the trend was reversed thereafter and for the remainder of the experiment S:R ratio was reduced in comparison with healthy controls. The contents of nitrogen, phosphate, potassium and calcium were reduced in rusted plants compared to controls. On the other hand, with few exceptions, the concentrations and specific absorption rates of these minerals increased in rusted plants compared with healthy controls. The ability of infected plants to maintain a functional S:R equilibrium with respect to nutrient uptake was examined using an analysis based on comparing changes in incremental plant dry weight with incremental nutrient weight. Calculated values of functional equilibrium for control and rusted plants showed that rust infection altered functional equilibrium with respect to uptake of the four nutrients. The possible mechanisms underlying these changes in physiology and the analysis of such changes are discussed.
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Claims 7
Claim · model-written summary
Rust infection substantially reduced leek dry weight.
- Taxon
- leeks
Allium ampeloprasume0 - Treatment
- inoculated with the rust, Puccinia alliie0
- Interactor
- Puccinia allii
.jpg?width=60)
Puccinia alliie0pathogen - Outcome
- dry weightse1
- Direction
- reducede1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“The dry weights of rust-infected plants were substantially reduced compared with controls”
Claim · model-written summary
Rust increased shoot:root ratio at two weeks after inoculation.
- Taxon
- leeksAllium ampeloprasume0
- Treatment
- inoculated with the rust, Puccinia alliie0
- Interactor
- Puccinia alliiPuccinia alliie0pathogen
- Outcome
- shoot: root (S: R) ratiose1
- Direction
- increasede1
- Comparator
- healthy leekse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“shoot: root (S: R) ratios were increased in rusted plants 2 weeks after inoculation”
Claim · model-written summary
Rust reduced shoot:root ratio later in the experiment.
- Taxon
- leeksAllium ampeloprasume0
- Treatment
- inoculated with the rust, Puccinia alliie0
- Interactor
- Puccinia alliiPuccinia alliie0pathogen
- Outcome
- S:R ratioe1
- Direction
- reducede1
- Comparator
- healthy controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“for the remainder of the experiment S:R ratio was reduced in comparison with healthy controls”
Claim · model-written summary
Rust reduced nitrogen, phosphate, and potassium contents.
- Taxon
- leeksAllium ampeloprasume0
- Treatment
- inoculated with the rust, Puccinia alliie0
- Interactor
- Puccinia alliiPuccinia alliie0pathogen
- Outcome
- contents of nitrogen, phosphate, potassiume1
- Direction
- reducede1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“The contents of nitrogen, phosphate, potassium and calcium were reduced in rusted plants compared to controls”
Claim · model-written summary
Rust reduced calcium content.
- Taxon
- leeksAllium ampeloprasume0
- Treatment
- inoculated with the rust, Puccinia alliie0
- Interactor
- Puccinia alliiPuccinia alliie0pathogen
- Outcome
- calciume1
- Direction
- reducede1
- Comparator
- controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“The contents of nitrogen, phosphate, potassium and calcium were reduced in rusted plants compared to controls”
Claim · model-written summary
Mineral concentrations and specific absorption rates generally increased in rusted leeks.
- Taxon
- leeksAllium ampeloprasume0
- Treatment
- inoculated with the rust, Puccinia alliie0
- Interactor
- Puccinia alliiPuccinia alliie0pathogen
- Outcome
- concentrations and specific absorption ratese1
- Direction
- increasede1
- Comparator
- healthy controlse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“with few exceptions, the concentrations and specific absorption rates of these minerals increased in rusted plants compared with healthy controls”
Claim · model-written summary
Rust altered functional equilibrium for uptake of four nutrients.
- Taxon
- leeksAllium ampeloprasume0
- Treatment
- rust infectione1
- Interactor
- Puccinia alliiPuccinia alliie0pathogen
- Outcome
- functional equilibrium with respect to uptake of the four nutrientse1
- Comparator
- healthy leekse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“healthy leeks and in leeks inoculated with the rust, Puccinia allii”
e1“rust infection altered functional equilibrium with respect to uptake of the four nutrients”
The same questions in other papers
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inoculation · nutrient: content · Allium ampeloprasum (leek)Positive and negative results
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2 papers in the same direction as this paper · 7 in the opposite direction
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See all 10 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.