Induction of a Light Requirement for the Germination of Lettuce Seed by Naringenin, and its Removal by Gibberellic Acid

Nature ◽  
1961 ◽  
Vol 192 (4799) ◽  
pp. 240-241 ◽  
Author(s):  
I. D. J. PHILLIPS
Keyword(s):  
Gibberellic Acid ◽  
Lettuce Seed ◽  
Light Requirement

Germination Behavior of Florida Pusley Seeds. II. Effects of Germination-Stimulating Chemicals

Weed Science ◽  
1976 ◽  
Vol 24 (4) ◽  
pp. 349-352 ◽  
Author(s):  
K. B. Paul ◽  
J. L. Crayton ◽  
P. K. Biswas
Keyword(s):  
Acetic Acid ◽  
Gibberellic Acid ◽  
Adenosine Monophosphate ◽  
Cold Stratification ◽  
Germination Inhibition ◽  
Light Requirement ◽  
Seed Germinability ◽  
Indole 3 Acetic Acid

Freshly harvested seeds of Florida pusley (Richardia scabraL.) require light for germination. Gibberellic acid (GA3) successfully replaced the light requirement of both scarified and unscarified seeds, while cyclic 3′,5′-adenosine monophosphate (C-AMP) stimulated the dark germination of scarified seeds only. Cold-stratification reduced seed germinability. The germination inhibition by cold-stratification was reversed by both GA3and KNO3treatments. Indole-3-acetic acid (IAA), kinetin, thiourea, and acetylcholine (ACh), either had no effect or reduced the germination percentages of Florida pusley seeds under all conditions studied.

The effects of ultra-high diluted gibberellic acid on in vitro lettuce seed germination.

2021 ◽  
Vol 15 (4) ◽  
pp. 50-54
Author(s):  
Carolina Santos Barreto ◽  
Fortune Homsani ◽  
Nina C Barboza Da Silva ◽  
Carla Holandino
Keyword(s):  
Gibberellic Acid ◽  
Lactuca Sativa ◽  
Germination Rate ◽  
Petri Dish ◽  
New Drugs ◽  
Lettuce Seed ◽  
Lettuce Seeds ◽  
Lactuca Sativa L ◽  
Petri Dishes

Lettuce seeds bioassays have been used in many different tests such as: alellopathyc models; developing of new drugs; ecotoxicity tests. In most cases, lettuce (Lactuca sativa L., Asteraceae) has been used because of its sensitivity, simultaneous and rapid germination, reliability of germination percentage and homogeneity of seeds. The main goal was to evaluate the effects of ultra-high diluted gibberellic acid (GA3) on lettuce seeds germination and seedling growth. Experiment was performed using Petri dishes containing one disk of Whatman nº01 paper watered with 1ml of water. In each Petri dish 10 lettuce seeds(Lactuca sativa L.) cv Regina 500 were placed and 2ml of the different treatment solutions were add: GA33µmol, GA3 3CH (10-6), GA3 12CH (10-24), water 12CH and water (no dilution and succussion). One milliliter solutions were added every 2 days of experiment. The experiment was repeated twice and each one consisted in 5 Petri dishes per treatment (n=100). All seeds were maintained in germination incubator under controlled temperature (25°C) and photoperiod (16L/8D). The tested substances were prepared according to Brazilian Homeopathic Pharmacopoeia (Brazil, 2011). The experiment was blinded all the time. All seeds germinated at same time (2 days) and after 7 days the germination rate was the same in all treatments. Root was affected just by Water 12 CH, in which shown the longest length (4.59 cm) when compared with others treatments. Shoot length was higher where gibberellin was added in concentration upper then Avogrado’s number.

scholarly journals Effect of Gibberellic Acid, Kinetin, and Ethylene plus Carbon Dioxide on the Thermodormancy of Lettuce Seed (Lactuca sativa L. cv. Mesa 659)

1975 ◽  
Vol 56 (6) ◽  
pp. 826-829 ◽  
Author(s):  
Robert D. Keys ◽  
Orrin E. Smith ◽  
Junji Kumamoto ◽  
Jessye L. Lyon
Keyword(s):  
Carbon Dioxide ◽  
Gibberellic Acid ◽  
Lactuca Sativa ◽  
Lettuce Seed ◽  
Lactuca Sativa L

scholarly journals Action of Gibberellic Acid on Lettuce Seed Germination

1960 ◽  
Vol 35 (5) ◽  
pp. 557-566 ◽  
Author(s):  
Hiroshi Ikuma ◽  
Kenneth V. Thimann
Keyword(s):  
Seed Germination ◽  
Gibberellic Acid ◽  
Lettuce Seed ◽  
Lettuce Seed Germination
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