Abstract
Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants. These Pn reductions were correlated with increases in leaf resistance to water vapor loss. Theoretical analyses demonstrated that, although the leaf resistance to water vapor loss increases could account for a major part of the net photosynthesis decreases, some other aspect of leaf functioning also was debilitated by infection. Both the levels and the activities of ribulose-1, 5-diP carboxylase were less on a leaf area basis in extracts from infected leaves than from healthy ones. Soluble carbohydrates accumulate in Beet Yellows Virus-infected leaves, but inhibiting translocation in several ways provided no evidence in support of the hypothesis that the accumulation of photosynthates in leaves has a direct, short term, feed-back effect upon the photosynthetic rate.
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Claims 7
Claim · model-written summary
Sugar beets infected with Beet Yellows Virus had lower net photosynthesis rates at light saturation than healthy plants.
- Taxon
- Sugar beets
Beta vulgaris subsp. vulgarise0 - Treatment
- infected with the Beet Yellows Viruse0
- Interactor
- Beet Yellows VirusBeet yellows viruse0pathogen
- Outcome
- rates of net photosynthesis at light saturatione0
- Direction
- lowere0
- Comparator
- healthy plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
Claim · model-written summary
Reductions in photosynthesis of sugar beets were correlated with increases in leaf resistance to water vapor loss.
- Taxon
- Sugar beetsBeta vulgaris subsp. vulgarise0
- Organ / stage
- leafe1
- Outcome
- leaf resistance to water vapor losse1
- Direction
- increasese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
e1“These Pn reductions were correlated with increases in leaf resistance to water vapor loss”
Claim · model-written summary
Theoretical analysis suggests that increased leaf resistance to water vapor loss could account for a major part of the net photosynthesis decreases in infected sugar beets.
- Taxon
- Sugar beetsBeta vulgaris subsp. vulgarise0
- Outcome
- net photosynthesis decreasese2
- Qualifier
- leaf resistance to water vapor loss increases could account for a major parte2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
e2“Theoretical analyses demonstrated that, although the leaf resistance to water vapor loss increases could account for a major part of the net photosynthesis decreases, some other aspect of leaf functioning also was debilitated by infection”
Claim · model-written summary
Another aspect of leaf functioning, besides water vapor resistance, was debilitated in infected sugar beets.
- Taxon
- Sugar beetsBeta vulgaris subsp. vulgarise0
- Outcome
- some other aspect of leaf functioninge2
- Direction
- debilitatede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
e2“some other aspect of leaf functioning also was debilitated by infection”
Claim · model-written summary
Levels and activities of ribulose-1,5-diP carboxylase per leaf area were lower in infected than in healthy sugar beet leaves.
- Taxon
- Sugar beetsBeta vulgaris subsp. vulgarise0
- Treatment
- infected leavese3
- Gene
- ribulose-1, 5-diP carboxylasee3
- Outcome
- levels and the activitiese3
- Direction
- lesse3
- Comparator
- healthy onese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
e3“Both the levels and the activities of ribulose-1, 5-diP carboxylase were less on a leaf area basis in extracts from infected leaves than from healthy ones”
Claim · model-written summary
Soluble carbohydrates accumulate in leaves of sugar beets infected with Beet Yellows Virus.
- Taxon
- Sugar beetsBeta vulgaris subsp. vulgarise0
- Interactor
- Beet Yellows VirusBeet yellows viruse4pathogen
- Outcome
- Soluble carbohydratese4
- Direction
- accumulatee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
e4“Soluble carbohydrates accumulate in Beet Yellows Virus-infected leaves”
Claim · model-written summary
Inhibiting translocation gave no evidence that photosynthate accumulation has a direct, short-term feed-back effect on the photosynthetic rate.
- Taxon
- Sugar beetsBeta vulgaris subsp. vulgarise0
- Treatment
- inhibiting translocation in several wayse5
- Outcome
- feed-back effect upon the photosynthetic ratee5
- Direction
- no_changeinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beets (Beta vulgaris L.) infected with the Beet Yellows Virus exhibit lower rates of net photosynthesis at light saturation than do healthy plants”
e5“inhibiting translocation in several ways provided no evidence in support of the hypothesis that the accumulation of photosynthates in leaves has a direct, short term, feed-back effect upon the photosynthetic rate”
The same questions in other papers
infection · Beet yellows virus · Beta vulgaris (beet)Results agree
10 papers in the same direction as this paper
- negative
- negative
- negative
7 papers more in this group
See all 11 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.