Abstract
Cuard cell protoplasts of Vicia faba treated with 10 p~ (+)abscisic acid (ABA) in the light exhibited a 20% decrease in diameter within 1.5 h, from 24.1 to 19.6 pm. Within 1 O s of administration of ABA, a 90% increase in levels of inositol 1,4,5-trisphosphate was observed, provided that cells were treated-with Li+, an inhibitor of inositol phosphatase activity, prior to incubation. Concomitantly, levels of 32P-labeled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphate decreased 20% compared to levels in control cells; levels of label in the membrane lipids phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol did not change significantly in response to ABA treatment. These results show that phosphoinositide turnover is activated in response to ABA in guard cells. We conclude that phosphoinositide signaling is likely to be a step in the biochemical cascade that couples ABA to guard cell shrinking and stomatal closure.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. 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 6
Claim · model-written summary
ABA-treated Vicia faba guard-cell protoplast diameter decreased 20% within 1.5 h.
- Taxon
- Vicia faba
Vicia fabae0 - Organ / stage
- Cuard cell protoplastse0
- Treatment
- 10 p~ (+)abscisic acid (ABA)e0
- Outcome
- diametere0
- Direction
- decreasee0
- Value
- 20%e0
- Qualifier
- within 1.5 h, from 24.1 to 19.6 pme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cuard cell protoplasts of Vicia faba treated with 10 p~ (+)abscisic acid (ABA) in the light exhibited a 20% decrease in diameter within 1.5 h, from 24.1 to 19.6 pm.”
Claim · model-written summary
ABA raised inositol 1,4,5-trisphosphate levels 90% within 10 s in Li+-pretreated cells.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- administration of ABAe0
- Outcome
- levels of inositol 1,4,5-trisphosphatee0
- Direction
- increasee0
- Value
- 90%e0
- Qualifier
- provided that cells were treated-with Li+e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within 1 O s of administration of ABA, a 90% increase in levels of inositol 1,4,5-trisphosphate was observed, provided that cells were treated-with Li+, an inhibitor of inositol phosphatase activity, prior to incubation.”
t0“Vicia faba”
Claim · model-written summary
ABA lowered labeled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphate levels 20%.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- ABA treatmente0
- Outcome
- levels of 32P-labeled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphatee0
- Direction
- decreasede0
- Value
- 20%e0
- Comparator
- control cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concomitantly, levels of 32P-labeled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphate decreased 20% compared to levels in control cells; levels of label in the membrane lipids phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol did not change significantly in response to ABA treatment.”
t0“Vicia faba”
Claim · model-written summary
ABA did not significantly change label in phosphatidylcholine, phosphatidylethanolamine and phosphatidylglycerol.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- ABA treatmente0
- Outcome
- levels of label in the membrane lipids phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerole0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concomitantly, levels of 32P-labeled phosphatidylinositol 4,5-bisphosphate and phosphatidylinositol 4-phosphate decreased 20% compared to levels in control cells; levels of label in the membrane lipids phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol did not change significantly in response to ABA treatment.”
t0“Vicia faba”
Claim · model-written summary
ABA activated phosphoinositide turnover in guard cells.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- guard cellse0
- Treatment
- ABAe0
- Outcome
- phosphoinositide turnover is activatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These results show that phosphoinositide turnover is activated in response to ABA in guard cells.”
t0“Vicia faba”
Claim · model-written summary
Phosphoinositide signaling likely links ABA to guard-cell shrinking and stomatal closure.
- Taxon
- Vicia fabaVicia fabat0
- Treatment
- ABAe0
- Outcome
- guard cell shrinking and stomatal closuree0
- Qualifier
- phosphoinositide signaling is likely to be a step in the biochemical cascadee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that phosphoinositide signaling is likely to be a step in the biochemical cascade that couples ABA to guard cell shrinking and stomatal closure.”
t0“Vicia faba”
The same questions in other papers
(+)-abscisic acid · molecular: metabolites · Vicia faba (faba bean)Results differ
2 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
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.