Abstract
The influences of light of different wavelengths and plant growth regulators on the respiration of protoplasts isolated from tissue 0 to 5 mm above the basal intercalary meristem of barley (Hordeum vulgare L. cv. Patty) leaves were studied. Respiration was measured using oxygen electrodes and a Cartesian-diver technique. Red, far-red and blue light all stimulated respiration in the protoplasts but not in mitochondria isolated from them. Gibberellic acid stimulated respiration in protoplasts but abscisic acid had the opposite effect. Physiological concentrations of indole-3-acetic acid and kinetin had no influence in either direction. Combinations of gibberellic acid with light of any wavelength always increased respiration. Red or far-red light treatments in the presence of abscisic acid decreased dark respiration and only blue light significantly reversed the inhibitory effect of abscisic acid. Cycloheximide markedly increased dark respiratory activity; chloramphenicol was without effect. These results indicate that mitochondrial activity in the leaf basal intercalary meristem was partially controlled through phytochrome and a blue light receptor, and by gibberellic and abscisic acids. Changes in cytosolic protein synthesis were important for the initiation of enhanced mitochondrial activity in meristems.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 14
Claim · model-written summary
Red, far-red and blue light stimulated respiration in barley protoplasts.
- Taxon
- Barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- Red, far-red and blue lighte0
- Outcome
- respiration in the protoplastse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Red, far-red and blue light all stimulated respiration in the protoplasts but not in mitochondria isolated from them”
t0“Barley”
Claim · model-written summary
Red, far-red and blue light did not stimulate respiration in isolated mitochondria.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Red, far-red and blue lighte0
- Outcome
- mitochondria isolated from theme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red, far-red and blue light all stimulated respiration in the protoplasts but not in mitochondria isolated from them”
t0“Barley”
Claim · model-written summary
Gibberellic acid stimulated barley protoplast respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Gibberellic acide0
- Outcome
- respiration in protoplastse0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid stimulated respiration in protoplasts but abscisic acid had the opposite effect”
t0“Barley”
Claim · model-written summary
Abscisic acid reduced barley protoplast respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- abscisic acide0
- Outcome
- respiration in protoplastse0
- Direction
- opposite effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid stimulated respiration in protoplasts but abscisic acid had the opposite effect”
t0“Barley”
Claim · model-written summary
Physiological indole-3-acetic acid did not influence respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Physiological concentrations of indole-3-acetic acide0
- Outcome
- Respirationt0
- Direction
- no influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological concentrations of indole-3-acetic acid and kinetin had no influence in either direction”
t0“Respiration of Protoplasts from Meristematic Cells in Barley”
Claim · model-written summary
Physiological kinetin did not influence respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- kinetine0
- Outcome
- Respirationt0
- Direction
- no influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological concentrations of indole-3-acetic acid and kinetin had no influence in either direction”
t0“Respiration of Protoplasts from Meristematic Cells in Barley”
Claim · model-written summary
Gibberellic acid combined with light of any wavelength increased barley protoplast respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- gibberellic acid with light of any wavelengthe0
- Outcome
- respiratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Combinations of gibberellic acid with light of any wavelength always increased respiration”
t0“Barley”
Claim · model-written summary
Red or far-red light in the presence of abscisic acid decreased dark respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Red or far-red light treatments in the presence of abscisic acide0
- Outcome
- dark respiratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red or far-red light treatments in the presence of abscisic acid decreased dark respiration”
t0“Barley”
Claim · model-written summary
Blue light significantly reversed the inhibitory effect of abscisic acid.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- blue lighte0
- Outcome
- inhibitory effect of abscisic acide0
- Direction
- reversede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only blue light significantly reversed the inhibitory effect of abscisic acid”
t0“Barley”
Claim · model-written summary
Cycloheximide markedly increased dark respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- Cycloheximidee0
- Outcome
- dark respiratory activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cycloheximide markedly increased dark respiratory activity”
t0“Barley”
Claim · model-written summary
Chloramphenicol had no effect on dark respiration.
- Taxon
- BarleyHordeum vulgaret0
- Treatment
- chloramphenicole0
- Outcome
- Respirationt0
- Direction
- without effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chloramphenicol was without effect”
t0“Respiration of Protoplasts from Meristematic Cells in Barley”
Claim · model-written summary
The authors infer mitochondrial activity is partly controlled by phytochrome and a blue light receptor.
- Taxon
- BarleyHordeum vulgaret0
- Gene
- phytochromee0
- Outcome
- mitochondrial activitye0
- Qualifier
- blue light receptore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mitochondrial activity in the leaf basal intercalary meristem was partially controlled through phytochrome and a blue light receptor”
t0“Barley”
Claim · model-written summary
The authors infer mitochondrial activity is partly controlled by gibberellic and abscisic acids.
- Taxon
- BarleyHordeum vulgaret0
- Compound
- gibberellic and abscisic acidse0
- Outcome
- mitochondrial activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mitochondrial activity in the leaf basal intercalary meristem was partially controlled through phytochrome and a blue light receptor, and by gibberellic and abscisic acids”
t0“Barley”
Claim · model-written summary
The authors infer changes in cytosolic protein synthesis initiate enhanced mitochondrial activity in meristems.
- Taxon
- BarleyHordeum vulgaret0
- Outcome
- enhanced mitochondrial activitye0
- Qualifier
- Changes in cytosolic protein synthesise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Changes in cytosolic protein synthesis were important for the initiation of enhanced mitochondrial activity in meristems”
t0“Barley”
The same questions in other papers
Gibberellic acid · physiology: respiration · Hordeum vulgare (barley)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →light · physiology: respiration · Hordeum vulgare (barley)Positive and negative results
1 in the opposite direction
- no effect
light · physiology: hormones · Hordeum vulgare (barley)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.