Abstract
SUMMARY The effects of virus infection on the sugar and fructosan contents of plants were studied by circular‐paper chromatography. Fructose and glucose in sugar‐beet leaves were greatly increased, and sucrose slightly, by infection with beet yellows virus (BYV): sugar content was increased more by an avirulent than by a virulent strain. Yellow‐net virus decreased the sugar concentration, whereas yellow‐net mild yellows virus increased it. Sugar accumulated in leaves of magnesium‐deficient plants, which also showed symptoms resembling virus yellows. Carrot motley dwarf virus increased fructose, glucose and sucrose concentrations in carrot leaves, but in petioles and roots sucrose increased while fructose and glucose decreased: more sugar accumulated in plants infected late than early. Applying menazon to the seed to control aphids increased the sucrose concentration of the roots. Cereal yellow dwarf virus (CYDV) increased fructose, glucose, sucrose and four fructosans in leaves of oats, an avirulent strain more than a virulent one. Virulent strains of BYV and CYDV apparently decrease photosynthesis more than avirulent ones.
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Claims 16
Claim · model-written summary
BYV infection greatly increased fructose and glucose in sugar-beet leaves.
- Taxon
- sugar‐beet
Beta vulgaris subsp. vulgarise0 - Treatment
- infection with beet yellows virus (BYV)e0
- Interactor
- beet yellows virusBeet yellows viruse0pathogen
- Outcome
- Fructose and glucosee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose and glucose in sugar‐beet leaves were greatly increased, and sucrose slightly, by infection with beet yellows virus (BYV)”
Claim · model-written summary
BYV infection slightly increased sucrose in sugar-beet leaves.
- Taxon
- sugar‐beetBeta vulgaris subsp. vulgarise0
- Treatment
- infection with beet yellows virus (BYV)e0
- Interactor
- beet yellows virusBeet yellows viruse0pathogen
- Outcome
- sucrosee0
- Direction
- increasede0
- Qualifier
- slightlye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fructose and glucose in sugar‐beet leaves were greatly increased, and sucrose slightly, by infection with beet yellows virus (BYV)”
Claim · model-written summary
Avirulent BYV increased sugar more than a virulent strain.
Verbatim
e0“sugar content was increased more by an avirulent than by a virulent strain.”
t0“plants”
Claim · model-written summary
Yellow-net virus decreased sugar concentration.
- Taxon
- plantsViridiplantaet0
- Treatment
- Yellow‐net viruse0
- Interactor
- Yellow‐net viruse0pathogen
- Outcome
- sugar concentratione0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Yellow‐net virus decreased the sugar concentration, whereas yellow‐net mild yellows virus increased it.”
t0“plants”
Claim · model-written summary
Yellow-net mild yellows virus increased sugar concentration.
- Taxon
- plantsViridiplantaet0
- Treatment
- yellow‐net mild yellows viruse0
- Interactor
- yellow‐net mild yellows viruse0pathogen
- Outcome
- sugar concentratione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Yellow‐net virus decreased the sugar concentration, whereas yellow‐net mild yellows virus increased it.”
t0“plants”
Claim · model-written summary
Sugar accumulated in magnesium-deficient plants.
- Taxon
- plantsViridiplantaee0
- Outcome
- Sugar accumulated in leavese0
Verbatim
e0“Sugar accumulated in leaves of magnesium‐deficient plants, which also showed symptoms resembling virus yellows.”
Claim · model-written summary
Magnesium-deficient plants showed symptoms resembling virus yellows.
- Taxon
- plantsViridiplantaee0
- Outcome
- symptoms resembling virus yellowse0
Verbatim
e0“Sugar accumulated in leaves of magnesium‐deficient plants, which also showed symptoms resembling virus yellows.”
Claim · model-written summary
Carrot motley dwarf virus increased fructose, glucose, and sucrose in carrot leaves.
- Taxon
- carrot
Daucus carotae0 - Treatment
- Carrot motley dwarf viruse0
- Interactor
- Carrot motley dwarf viruse0pathogen
- Outcome
- fructose, glucose and sucrose concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Carrot motley dwarf virus increased fructose, glucose and sucrose concentrations in carrot leaves”
Claim · model-written summary
Carrot motley dwarf virus increased sucrose in carrot petioles and roots.
- Taxon
- plantsViridiplantaet0
- Organ / stage
- petioles and rootse0
- Treatment
- Carrot motley dwarf viruse1
- Outcome
- sucrosee0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“but in petioles and roots sucrose increased while fructose and glucose decreased”
e1“Carrot motley dwarf virus increased fructose, glucose and sucrose concentrations in carrot leaves”
t0“plants”
Claim · model-written summary
Carrot motley dwarf virus decreased fructose and glucose in petioles and roots.
- Taxon
- plantsViridiplantaet0
- Organ / stage
- petioles and rootse0
- Outcome
- fructose and glucosee0
- Direction
- decreasede0
Not reportedTreatmentComparator
Verbatim
e0“but in petioles and roots sucrose increased while fructose and glucose decreased”
e1“Carrot motley dwarf virus increased fructose, glucose and sucrose concentrations in carrot leaves”
t0“plants”
Claim · model-written summary
Later infection produced more sugar accumulation than earlier infection.
- Taxon
- plantsViridiplantaee0
- Outcome
- sugare0
- Direction
- moree0
- Comparator
- earlye0
Verbatim
e0“more sugar accumulated in plants infected late than early.”
Claim · model-written summary
Menazon seed treatment increased root sucrose concentration.
- Taxon
- plantsViridiplantaet0
- Treatment
- Applying menazon to the seede0
- Interactor
- aphidsAphidomorphae0pest
- Outcome
- sucrose concentration of the rootse0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Applying menazon to the seed to control aphids increased the sucrose concentration of the roots.”
t0“plants”
Claim · model-written summary
CYDV increased fructose, glucose, and sucrose in oat leaves.
- Taxon
- oats
Avena sativae0 - Treatment
- Cereal yellow dwarf virus (CYDV)e0
- Interactor
- Cereal yellow dwarf virusCereal yellow dwarf viruse0pathogen
- Outcome
- fructose, glucose, sucrosee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cereal yellow dwarf virus (CYDV) increased fructose, glucose, sucrose and four fructosans in leaves of oats”
Claim · model-written summary
CYDV increased four fructosans in oat leaves.
- Taxon
- oatsAvena sativae0
- Treatment
- Cereal yellow dwarf virus (CYDV)e0
- Interactor
- Cereal yellow dwarf virusCereal yellow dwarf viruse0pathogen
- Outcome
- four fructosanse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cereal yellow dwarf virus (CYDV) increased fructose, glucose, sucrose and four fructosans in leaves of oats”
Claim · model-written summary
An avirulent CYDV strain increased oat sugars more than a virulent strain.
- Taxon
- oatsAvena sativae1
- Outcome
- sucrosee1
- Direction
- moree0
- Comparator
- a virulent onee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an avirulent strain more than a virulent one.”
e1“Cereal yellow dwarf virus (CYDV) increased fructose, glucose, sucrose and four fructosans in leaves of oats”
t0“plants”
Claim · model-written summary
Virulent BYV and CYDV strains apparently reduce photosynthesis more than avirulent ones.
- Taxon
- plantsViridiplantaet0
- Outcome
- photosynthesise0
- Direction
- decreasee0
- Comparator
- avirulent onese0
Verbatim
e0“Virulent strains of BYV and CYDV apparently decrease photosynthesis more than avirulent ones.”
t0“plants”
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.