Abstract
Variegation is a common trait in plants that characteristically displays white or off-colored plant tissue. In grapevine, leaf variegation is expressed as white and pale green leaf tissue resulting in plants that are stunted in growth and hindered in development. In this study, several experiments were performed to investigate the impact of this mutation has on the anatomy of grape leaves and physiology of the plant. Histological staining of variegated and nonvariegated leaf tissue transections showed alterations to the leaf palisade mesophyll structure that affected leaf tissue width. An assay quantifying leaf pigments was performed to compare chlorophyll and carotenoid concentrations in leaves between variegated and wild-type seedlings, which showed that variegated leaf samples had reduced chlorophyll and carotenoid concentration. Through fluorescence imaging, we determined that photochemical efficiency of photosystem II (PSII) is reduced in variegated seedlings. By growing variegated and wild-type plants under high, medium, and low light intensities that variegated plants exposed to higher light intensity reduces the phenotypic expression of the variegation trait. Also, we found variegated plants to have significant reductions in growth traits such as plant height, leaf number, branch number, and dry weight compared with wild-type phenotype plants. Overall, our experiments revealed the variegation mutation altered normal leaf development causing significant effects to grapevine physiology.
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Claims 7
Claim · model-written summary
Variegated leaf tissue showed altered palisade mesophyll structure and leaf width.
- Material
- variegatede0
- Organ / stage
- leafe0
- Outcome
- leaf palisade mesophyll structuree0
- Qualifier
- affected leaf tissue widthe0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Histological staining of variegated and nonvariegated leaf tissue transections showed alterations to the leaf palisade mesophyll structure that affected leaf tissue width”
t0“Grapevine”
Claim · model-written summary
Variegated leaves had reduced chlorophyll concentration versus wild type.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variegated leaf samples had reduced chlorophyll and carotenoid concentration”
t0“Grapevine”
Claim · model-written summary
Variegated leaves had reduced carotenoid concentration versus wild type.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variegated leaf samples had reduced chlorophyll and carotenoid concentration”
t0“Grapevine”
Claim · model-written summary
Variegated seedlings had reduced PSII photochemical efficiency.
- Material
- variegated seedlingse0
- Outcome
- photochemical efficiency of photosystem II (PSII)e0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photochemical efficiency of photosystem II (PSII) is reduced in variegated seedlings”
t0“Grapevine”
Claim · model-written summary
Higher light intensity reduced expression of variegation in variegated plants.
- Material
- variegated plantse0
- Treatment
- higher light intensitye0
- Outcome
- phenotypic expression of the variegation traite0
- Direction
- reducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variegated plants exposed to higher light intensity reduces the phenotypic expression of the variegation trait”
t0“Grapevine”
Claim · model-written summary
Variegated plants had significantly lower height, leaf number and branch number than wild-type plants.
- Material
- variegated plantse0
- Outcome
- plant height, leaf number, branch numbere0
- Direction
- reductionse0
- Comparator
- wild-type phenotype plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variegated plants to have significant reductions in growth traits such as plant height, leaf number, branch number, and dry weight compared with wild-type phenotype plants”
t0“Grapevine”
Claim · model-written summary
Variegated plants had significantly lower dry weight than wild-type plants.
- Material
- variegated plantse0
- Outcome
- dry weighte0
- Direction
- reductionse0
- Comparator
- wild-type phenotype plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“variegated plants to have significant reductions in growth traits such as plant height, leaf number, branch number, and dry weight compared with wild-type phenotype plants”
t0“Grapevine”
The same questions in other papers
light · molecular: expression · VitisPositive and negative results
6 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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See all 8 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.