Claim · model-written summary
GA 3 acidified the cytosol of germinating pollen grains, similar to the effect in ungerminating pollen grains.
- Taxon
- Petunia hybrida
Petunia ×hybridat0 - Treatment
- GA 3e3
- Outcome
- cytosole3
- Direction
- acidifiede3
- Comparator
- ungerminating pollen grainse3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Petunia hybrida pollen grains”
e3“GA 3 acidified the cytosol, i.e., exerted the effect similar to that in ungerminating pollen grains”
Title
Effects of exogenous phytohormones on intracellular pH of Petunia hybrida pollen grains
I. M. Andreev; G. V. Timofeeva; Yu. V. Minkina; et al. Russian Journal of Plant Physiology 2007. doi:10.1134/s1021443707050093
Other claims from this paper (9)
- Intervention effect In ungerminating pollen grains, all exogenous phytohormones reduced cytoplasmic pH rapidly, and the initial value was restored after 10–15 min.
- Intervention effect IAA and ABA induced a rapid cytosol alkalization in germinating pollen grains that was not reversed during the experiment.
- Intervention effect Sodium orthovanadate suppressed the hormone-induced cytosolic pH shift toward alkaline values in germinating pollen grains.
- Intervention effect Sodium orthovanadate did not affect cytosolic pH in the absence of phytohormones.
- Intervention effect Sodium orthovanadate slowed the recovery of cytosolic pH after hormone-induced acidification in ungerminating pollen grains.
- Intervention effect Sodium orthovanadate reduced cytosolic pH in control ungerminating pollen grains.
- Intervention effect Sodium orthovanadate substantially weakened the effects of all phytohormones on ungerminating pollen grains.
- Mechanism The authors suggest that the physiological activities of phytohormones are mediated by cytosolic pH modulation.
- Mechanism The authors conclude that the hormone-induced cytoplasm alkalization in pollen grains is mediated by plasma membrane H+-ATPase activity.