Claim · model-written summary
The authors conclude that the light-induced drop in GA1 level is not achieved through regulation of GA 20-oxidase and GA 3beta-hydroxylase mRNA accumulation.
- Taxon
- pea
Lathyrus oleraceuse1 - Gene
- GA 20-ox and GA 3beta-hye0
- Outcome
- light-induced drop in GA(1) levele0
Not reportedMaterialCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the light-induced drop in GA(1) level is not achieved through regulation of GA 20-ox and GA 3beta-hy mRNA accumulation”
e1“pea (Pisum sativum L.)”
Title
Tahar Ait-Ali; Shannon Frances; James L. Weller; et al. PLANT PHYSIOLOGY 1999. doi:10.1104/pp.121.3.783
Other claims from this paper (7)
- Intervention effect The GA 20-oxidase transcript level was higher in light-grown pea seedlings than in etiolated seedlings.
- Intervention effect GA 3beta-hydroxylase mRNA accumulation was higher in etiolated pea seedlings than in light-grown seedlings.
- Intervention effect Transfer of etiolated pea seedlings to light led to a 5-fold increase in the expression of both GA 20-oxidase and GA 3beta-hydroxylase transcripts 4 h after transfer.
- Mechanism GA 20-oxidase mRNA accumulation in pea is regulated by both phytochromes A and B.
- Intervention effect Transfer of pea seedlings to light resulted in a 6-fold decrease in GA1 levels within 2 h.
- Intervention effect Exogenous GA1 applied to apical buds of etiolated pea seedlings before light treatment inhibited the light-induced accumulation of both GA 20-oxidase and GA 3beta-hydroxylase mRNA.
- Mechanism The authors suggest that negative feedback regulation is an important mechanism in regulating GA 20-oxidase and GA 3beta-hydroxylase mRNA accumulation during de-etiolation of pea seedlings.