Abstract
ABSTRACT The photosynthetic capacity and Rubisco levels of primary wheat leaves were reduced significantly in plants grown on media supplemented with 1 % glucose. Neither the chlorophyll content nor the growth rate of the primary leaf was affected by this treatment. In glucose‐fed plants a decrease in levels of mRNA encoding several Calvin cycle enzymes (fructose 1,6‐bisphosphatase, sedoheptulose 1,7‐bisphosphatase, phosphoglycerate kinase and Rubisco Small Subunit) was found to correspond to an increase in the internal levels of glucose. In control plants endogenous levels of glucose and sucrose were measured in leaf sections from the base to the tip of the primary leaf, which revealed a gradient of each of these sugars within the leaf, with the highest levels at the tip. Conversely, Calvin cycle transcripts were seen to decrease in the oldest tip sections. In glucose‐fed plants, the endogenous glucose levels were increased throughout the leaf but Calvin cycle RNA levels were most markedly reduced in the mid‐leaf section. These data indicate that the changing metabolic status of the cells from the base to the tip of the primary wheat leaf may play a role in the regulation of Calvin cycle gene expression during normal leaf development.
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Claims 9
Claim · model-written summary
One percent glucose significantly reduced wheat leaf photosynthetic capacity.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- 1 % glucosee0
- Outcome
- photosynthetic capacitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic capacity and Rubisco levels of primary wheat leaves were reduced significantly in plants grown on media supplemented with 1 % glucose.”
Claim · model-written summary
One percent glucose significantly reduced Rubisco levels in wheat leaves.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 1 % glucosee0
- Gene
- Rubiscoe0
- Outcome
- Rubisco levelse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The photosynthetic capacity and Rubisco levels of primary wheat leaves were reduced significantly in plants grown on media supplemented with 1 % glucose.”
Claim · model-written summary
Glucose feeding did not affect chlorophyll content.
- Taxon
- wheatTriticum aestivumt1
- Treatment
- glucose feedingt0
- Outcome
- chlorophyll contente0
- Direction
- Neithere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the chlorophyll content nor the growth rate of the primary leaf was affected by this treatment.”
t0“glucose feeding”
t1“wheat”
Claim · model-written summary
Glucose feeding did not affect primary leaf growth rate.
- Taxon
- wheatTriticum aestivumt1
- Treatment
- glucose feedingt0
- Outcome
- growth rate of the primary leafe0
- Direction
- was affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the chlorophyll content nor the growth rate of the primary leaf was affected by this treatment.”
t0“glucose feeding”
t1“wheat”
Claim · model-written summary
In glucose-fed plants, lower Calvin cycle enzyme mRNA corresponded to higher internal glucose.
- Taxon
- wheatTriticum aestivumt0
- Gene
- fructose 1,6‐bisphosphatase, sedoheptulose 1,7‐bisphosphatase, phosphoglycerate kinase and Rubisco Small Subunite0
- Compound
- glucosee0
- Outcome
- levels of mRNA encoding several Calvin cycle enzymese0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In glucose‐fed plants a decrease in levels of mRNA encoding several Calvin cycle enzymes (fructose 1,6‐bisphosphatase, sedoheptulose 1,7‐bisphosphatase, phosphoglycerate kinase and Rubisco Small Subunit) was found to correspond to an increase in the internal levels of glucose.”
t0“wheat”
Claim · model-written summary
Control leaves had glucose and sucrose gradients, highest at the tip.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- tipe0
- Outcome
- a gradient of each of these sugars within the leafe0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“endogenous levels of glucose and sucrose were measured in leaf sections from the base to the tip of the primary leaf, which revealed a gradient of each of these sugars within the leaf, with the highest levels at the tip.”
t0“wheat”
Claim · model-written summary
Calvin cycle transcripts decreased in the oldest leaf tip sections.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- oldest tip sectionse0
- Outcome
- Calvin cycle transcriptse0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calvin cycle transcripts were seen to decrease in the oldest tip sections.”
t0“wheat”
Claim · model-written summary
Glucose feeding increased endogenous glucose throughout the leaf.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- glucose‐fede0
- Outcome
- endogenous glucose levelse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In glucose‐fed plants, the endogenous glucose levels were increased throughout the leaf”
t0“wheat”
Claim · model-written summary
Glucose feeding most strongly reduced Calvin cycle RNA in the mid-leaf section.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- mid‐leaf sectione0
- Treatment
- glucose‐fede0
- Outcome
- Calvin cycle RNA levelse0
- Direction
- most markedly reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In glucose‐fed plants, the endogenous glucose levels were increased throughout the leaf but Calvin cycle RNA levels were most markedly reduced in the mid‐leaf section.”
t0“wheat”
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See all 59 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.