Abstract
Plant growth is continuously modulated by endogenous and exogenous stimuli. By no means the only, but well described, signaling molecules produced in plants and distributed through the plant body to orchestrate efficient growth are photosynthates. Light is a potent exogenous stimulus that determines, first, the rate of photosynthesis, but also the rate of plant growth. Root meristem activity is reduced with direct illumination but enhanced with increased sugar levels. With reduced cotyledon illumination, the seedling increases hypocotyl elongation until adequate light exposure is again provided. If endogenous carbon sources are limited, this leads to a temporary inhibition of root growth. Experimental growth conditions include exogenous supplementation of sucrose or glucose in addition to culturing seedlings under light exposure in Petri dishes. We compared total root length and hypocotyl elongation of Arabidopsis thaliana wild type Col-0 in response to illumination status and carbon source in the growth medium. Overall, sucrose supplementation promoted hypocotyl and root length to a greater extent than glucose supplementation. Glucose promoted root length compared to non-supplemented seedlings especially when cotyledon illumination was greatly reduced.
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Claims 7
Claim · model-written summary
Direct illumination reduced root meristem activity.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- direct illuminatione0
- Outcome
- Root meristem activitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root meristem activity is reduced with direct illumination but enhanced with increased sugar levels.”
t0“Arabidopsis thaliana wild type Col-0”
Claim · model-written summary
Increased sugar levels enhanced root meristem activity.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- increased sugar levelse0
- Outcome
- Root meristem activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root meristem activity is reduced with direct illumination but enhanced with increased sugar levels.”
t0“Arabidopsis thaliana wild type Col-0”
Claim · model-written summary
Reduced cotyledon light increased hypocotyl elongation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- reduced cotyledon illuminatione0
- Outcome
- hypocotyl elongatione0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With reduced cotyledon illumination, the seedling increases hypocotyl elongation until adequate light exposure is again provided.”
t0“Arabidopsis thaliana wild type Col-0”
Claim · model-written summary
Limited endogenous carbon temporarily inhibited root growth.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Compound
- endogenous carbon sourcese0
- Outcome
- root growthe0
- Direction
- inhibitione0
- Qualifier
- temporarye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“If endogenous carbon sources are limited, this leads to a temporary inhibition of root growth.”
t0“Arabidopsis thaliana wild type Col-0”
Claim · model-written summary
Sucrose supplementation promoted hypocotyl length more than glucose supplementation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- sucrose supplementatione0
- Outcome
- hypocotyle0
- Direction
- greater extente0
- Comparator
- glucose supplementatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, sucrose supplementation promoted hypocotyl and root length to a greater extent than glucose supplementation.”
t0“Arabidopsis thaliana wild type Col-0”
Claim · model-written summary
Sucrose supplementation promoted root length more than glucose supplementation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- sucrose supplementatione0
- Outcome
- root lengthe0
- Direction
- greater extente0
- Comparator
- glucose supplementatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Overall, sucrose supplementation promoted hypocotyl and root length to a greater extent than glucose supplementation.”
t0“Arabidopsis thaliana wild type Col-0”
Claim · model-written summary
Glucose increased root length over unsupplemented seedlings, especially under greatly reduced cotyledon light.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Glucosee0
- Outcome
- root lengthe0
- Direction
- promotede0
- Qualifier
- cotyledon illumination was greatly reducede0
- Comparator
- non-supplemented seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glucose promoted root length compared to non-supplemented seedlings especially when cotyledon illumination was greatly reduced.”
t0“Arabidopsis thaliana wild type Col-0”
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See all 44 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.