Abstract
Soluble sugars were extracted by low speed centrifugation from the apoplast of leaves of barley (Hordeum distichum L.) infiltrated with water. Infection of the leaf with the brown rust fungus (Puccinia hordeii) resulted in a reduction in the concentration of sucrose, glucose and fructose in the apoplast. Sugars were present in an apoplastic space occupying 12 and 17 cm3 m−2 of leaf area in healthy and infected tissue, respectively. Uptake of hexoses by intercellular hyphae is suggested as a cause of this reduction. The pH of apoplastic sap extracted from rust-infected leaves was increased to pH 7·3 from pH 6·6 in controls. The effect of a reduced apoplastic sugar pool and increased pH on export from infected leaves is discussed.
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Claims 4
Claim · model-written summary
Infection with brown rust reduced apoplastic sucrose, glucose and fructose concentrations in barley leaves.
- Taxon
- Hordeum distichum
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Hordeum vulgare var. distichone0 - Treatment
- Infection of the leaf with the brown rust funguse1
- Interactor
- Puccinia hordeiie1pathogen
- Outcome
- concentration of sucrose, glucose and fructose in the apoplaste1
- Direction
- reductione1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“from the apoplast of leaves of barley (Hordeum distichum L.)”
e1“Infection of the leaf with the brown rust fungus (Puccinia hordeii) resulted in a reduction in the concentration of sucrose, glucose and fructose in the apoplast”
Claim · model-written summary
Sugars occupied an apoplastic space of 12 and 17 cm3 m−2 of leaf area in healthy and infected tissue, respectively.
- Taxon
- Hordeum distichumHordeum vulgare var. distichone0
- Outcome
- apoplastic spacee2
- Value
- 12 and 17 cm3 m−2e2
- Qualifier
- in healthy and infected tissuee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from the apoplast of leaves of barley (Hordeum distichum L.)”
e2“Sugars were present in an apoplastic space occupying 12 and 17 cm3 m−2 of leaf area in healthy and infected tissue”
Claim · model-written summary
Uptake of hexoses by intercellular hyphae is suggested as a cause of the reduction in apoplastic sugars.
- Taxon
- Hordeum distichumHordeum vulgare var. distichone0
- Outcome
- reductione3
- Qualifier
- Uptake of hexoses by intercellular hyphaee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from the apoplast of leaves of barley (Hordeum distichum L.)”
e3“Uptake of hexoses by intercellular hyphae is suggested as a cause of this reduction”
Claim · model-written summary
The pH of apoplastic sap increased from pH 6.6 in controls to pH 7.3 in rust-infected leaves.
- Taxon
- Hordeum distichumHordeum vulgare var. distichone0
- Treatment
- rust-infected leavese4
- Outcome
- pH of apoplastic sape4
- Direction
- increasede4
- Value
- pH 7·3 from pH 6·6e4
- Comparator
- controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from the apoplast of leaves of barley (Hordeum distichum L.)”
e4“The pH of apoplastic sap extracted from rust-infected leaves was increased to pH 7·3 from pH 6·6 in controls”
The same questions in other papers
infection · molecular: metabolites · Hordeum vulgare (barley)Positive and negative results
11 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 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.