scholarly journals γ-Polyglutamic acid/chitosan nanoparticles for the plant growth regulator gibberellic acid: Characterization and evaluation of biological activity

2017 ◽  
Vol 157 ◽  
pp. 1862-1873 ◽  
Author(s):  
A.E.S. Pereira ◽  
I.E. Sandoval-Herrera ◽  
S.A. Zavala-Betancourt ◽  
H.C. Oliveira ◽  
A.S. Ledezma-Pérez ◽  
...  
Keyword(s):  
Biological Activity ◽  
Plant Growth ◽  
Gibberellic Acid ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Chitosan Nanoparticles ◽  
Polyglutamic Acid

PLANT GROWTH REGULATOR ACTIVITY OF SOLUBLE HUMIC COMPLEXES

1984 ◽  
Vol 64 (2) ◽  
pp. 225-228 ◽  
Author(s):  
G. CACCO ◽  
G. DELL’AGNOLA
Keyword(s):  
Biological Activity ◽  
Plant Growth ◽  
Key Words ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Good Evidence ◽  
High Concentration ◽  
Stem Curvature ◽  
Cytokinin Bioassays

Auxin and cytokinin bioassays were performed to test the biological activity of soluble humic complexes (SHC). "Pea split stem curvature" (auxin test) and "cucumber" tests (cytokinin test) did not show any quantifiable biological activity of SHC. On the contrary, "cress test" and "senescence test" offered good evidence of a hormonal-like activity 100 times lower than that of IAA (10 mg IAA∙g−1 SHC) and 10 times lower than that of N6 BA (100 mg N6 BA∙g−1 SHC). At a high concentration of SHC, toxic effects were evident, indicating the presence of inhibitory substances which counteracted the hormone-like activity of humic complexes. Key words: Plant growth regulators, soluble humic complexes

scholarly journals Plant Growth Regulator Impacts on Vegetative Cutting Production of Moroccan Pincushion (Pterocephalus depressus) Plants

2021 ◽  
Vol 39 (2) ◽  
pp. 62-67
Author(s):  
Sean J. Markovic ◽  
James E. Klett
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Growth Index ◽  
Dry Weight ◽  
Stock Plant ◽  
Cutting Production

Abstract Moroccan pincushion (Pterocephalus depressus) is a drought-tolerant perennial that is being used in landscapes throughout arid areas of the western United States. This paper describes two experiments researching vegetative cutting production from stock plants. Moroccan pincushion stock plants received foliar applications of gibberellic acid (GA3), benzyladenine, ethephon, or auxin [indole-3-butyric acid (IBA)] plant growth regulators (PGR). Plant growth regulators were applied singularly and in combination with GA3 to determine efficacy on stock plant growth. A propagation study was conducted simultaneously to determine effects of these different PGR treatments applied to stock plants on the rooting of moroccan pincushion cuttings. The stock plant study showed GA3 + benzyladenine application increased cutting production over other PGR treatments. Fresh weight of moroccan pincushion cuttings did not differ among treatments. While cuttings did not differ in dry weight in experiment 1, statistical differences were observed in experiment 2. However, these differences in dry weight did not affect the quality of the cuttings. Cuttings from stock plants treated with GA3 + IBA treatment had the highest numerical growth index [(height + width + width)/3]. Cuttings from stock plants treated with GA3 alone or in combination with another PGR were all greater in average growth index and statistically differed from those without GA3 being applied. PGR treatments did not affect rooting percentages of the cuttings with nontreated stock plant cuttings successfully rooting at an average rate of 95%. However, GA3 + IBA was the only treatment where cuttings had 100% rooting for both experiments, indicating potential rooting benefits. Index words: Plant growth regulator, propagation, Pterocephalus depressus, vegetative cuttings. Species used in this study: Moroccan pincushion [Pterocephalus depressus Archibald]. Chemicals used in this study: gibberellic acid (GA3), benzyladenine, ethephon, indole-3-butyric acid (IBA).

scholarly journals Effects of Gibberellic Acid Treatments on Fruit and Seed Development of Muscadine Grapes

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 662f-663
Author(s):  
J. Lu ◽  
O. Lamikanra
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Maximal Increase ◽  
Genotype Variation ◽  
Before And After ◽  
Early Ripening ◽  
Grape Cultivars ◽  
Muscadine Grapes

Gibberellic acid, a plant growth regulator commonly sprayed for seedless bunch grape cultivars, was used to spray on the seeded muscadine grape cultivars `Carlos', `Fry', `Higgins' and `Triumph'. GA3 at 100 to 300 ppm were sprayed on leaves and fruit clusters before and after anthesis. The flower/fruit clusters also were dipped into a much higher concentration (1000 ppm) in addition to the sprayed concentration of GA3. Berry weight significantly increased in all the sprayed vines, with a maximal increase up to 50%. Early and more uniform ripening was observed in the cultivar `Triumph'. More than 20% of seedless berries also were found on the GA3-sprayed `Triumph' vines. However, the latter two responses (early ripening and seedlessness) did not occur in other cultivars tested. Similar results also were obtained in the dipping treatments. The results indicated that the seeded muscadine grapes responded well to the GA3 treatments in general, but genotype variation is obvious.

scholarly journals Manipulating Primocane Architecture in Thornless Blackberry with Uniconazole, GA3, and BA

HortScience ◽  
1992 ◽  
Vol 27 (2) ◽  
pp. 116-118 ◽  
Author(s):  
Hermen Malik ◽  
Douglas D. Archbold
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Branch Length ◽  
Dry Weight ◽  
Thornless Blackberry

The potential for plant growth regulator (PGR) manipulation of `Chester Thornless' blackberry (fibus spp.) primocane growth was evaluated. PGR treatments included combinations of soil-applied uniconazole at 1, 5, 25, and 125 mg/plant and GA, foliar-applied one or two times at 100 ppm 3 and 4 weeks after a 25-mg/plant uniconazole application. Also, GA and BA were applied at 100 ppm alone or in combination one, two, or three times. Increasing rates of uniconazole reduced primocane length, leaflet count, and leaf, cane, and root dry weights. GA, applications reduced primocane length and increased branch elongation but failed to reverse the effects of uniconazole at 25 mg/plant, except those on branch length, leaflet count, and primocane dry weight. Only applications of BA + GA, increased both branch production and elongation and dry weights of some component tissues, while BA alone generally had no effects. Chemical names used: (E)-1-(p-chlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)-1-penten-3-ol (uniconazole); N-(phenylmethyl)-1H-purin-6-amine (benzyladenine, BA); gibberellic acid (GA).

Gibberellic acid, a plant growth regulator, increases mast cell recruitment and alters Substance P levels

Toxicology ◽  
2008 ◽  
Vol 254 (1-2) ◽  
pp. 75-81 ◽  
Author(s):  
Nuray Erin ◽  
Berna Afacan ◽  
Yasemin Ersoy ◽  
Feriha Ercan ◽  
Mustafa Kemal Balcı
Keyword(s):  
Mast Cell ◽  
Substance P ◽  
Plant Growth ◽  
Gibberellic Acid ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Cell Recruitment

scholarly journals Gibberellic acid in vegetative and reproductive development of Phalaenopsis orchid hybrid genus

2012 ◽  
Vol 30 (1) ◽  
pp. 71-74 ◽  
Author(s):  
Jean C Cardoso ◽  
Elizabeth O Ono ◽  
João D Rodrigues
Keyword(s):  
Plant Growth ◽  
Gibberellic Acid ◽  
Growth Regulator ◽  
Plant Growth Regulator ◽  
Reproductive Development ◽  
Foliar Sprays ◽  
Low Concentrations ◽  
Flowering Control ◽  
Flower Quality

The flower industry represents about one billion dollars in Brazil and the development of techniques aimed at flowering control is required. This study evaluated the influence of gibberellic acid (GA3) on the vegetative and reproductive development of young plants of Phalaenopsis FSNT 'Dai-Itigo' hybrid pink color. The application of GA3 was made by foliar sprays at concentrations of 0, 125, 250, 500 and 1,000 mg L -1. The length of leaves increased significantly when using GA3 at low concentrations, but leaf width decreased. The application of GA3 at 125 mg L -1 showed the best results for the promotion of flowering and flower quality of this orchid hybrid. In this treatment, about 50% of plants treated with GA3 flowered about 6-12 months before the plants that were non-treated with this plant growth regulator. The quality of flowering and flowers was best with 125 mg L -1 GA3.

Sign in / Sign up

Export Citation Format

Share Document