Claim · model-written summary
GA3 above 1 mg/l increased the rate of frond production and the number of vegetative fronds (# VF) in Lemna gibba G3.
- Taxon
- Lemna gibba G3
Lemna gibbat0 - Treatment
- GA(3) concentrations above 1 mg/le0
- Outcome
- rate of frond productione0
- Direction
- increasee0
- Qualifier
- increase in the # VF (number of vegetative fronds)e0
Not reportedComparator
Verbatim
e0“GA(3) concentrations above 1 mg/l caused a decrease in frond size and fresh and dry weight, but an increase in the rate of frond production and thus an increase in the # VF (number of vegetative fronds)”
t0“Lemna gibba G3”
Title
Gibberellin and CCC Effects on Flowering and Growth in the Long-day Plant Lemna gibba G3
Charles F. Cleland; Winslow S. Briggs PLANT PHYSIOLOGY 1969. doi:10.1104/pp.44.4.503
Other claims from this paper (10)
- Intervention effect Gibberellic acid at 0.1 to 100 mg/l did not induce flowering in Lemna gibba G3 on short days.
- Intervention effect Gibberellic acid inhibited flowering of Lemna gibba G3 on long days at concentrations of 1 mg/l and higher.
- Intervention effect On both short and long days GA3 above 1 mg/l decreased frond size and fresh and dry weight of Lemna gibba G3.
- Intervention effect Gibberellin A7 gave results identical to GA3 in Lemna gibba G3.
- Intervention effect CCC at 10(-3) M in the culture medium on long days almost completely inhibited flowering of Lemna gibba G3.
- Intervention effect CCC also inhibited vegetative growth of Lemna gibba G3 to some extent.
- Intervention effect With CCC at 10(-3) M, simultaneous addition of GA3 partially reversed the flower inhibition, with 0.3 mg/l GA3 optimal.
- Intervention effect The CCC-induced inhibition of vegetative growth, measured by fresh and dry weight, was also partially reversed by GA3.
- Observation The threshold GA3 concentration for reversing flower inhibition was at least 10 times lower than that for reversing the inhibition of vegetative growth.
- Mechanism The authors interpret the results as showing that gibberellins are important for flowering in L. gibba G3 but are present in non-limiting concentrations on short days.