scholarly journals Research Note: Benefits and Drawbacks of Pre-bloom Applications of Gibberellic Acid (GA3) for Stem Elongation in Sauvignon blanc

2016 ◽  
Vol 33 (2) ◽  
Author(s):  
D. Molitor ◽  
M. Behr ◽  
L. Hoffmann ◽  
D. Evers
Keyword(s):  
Gibberellic Acid ◽  
Stem Elongation ◽  
Research Note ◽  
Sauvignon Blanc

scholarly journals Gibberellic acid flower formation and stem elongation in Silene armeria.

1973 ◽  
Vol 21 (4) ◽  
pp. 245-255
Author(s):  
S.J. Wellensiek
Keyword(s):  
Gibberellic Acid ◽  
Stem Elongation ◽  
Flowering Plants ◽  
Plant Age ◽  
Flower Formation ◽  
High Concentration ◽  
Short Day ◽  
Long Day ◽  
Silene Armeria

Several selected S. armeria lines differing in their reaction to GA3 were treated with GA3 at various concentrations under short-day (SD) or long-day conditions. With SD treatment one application of GA3 at high concentration (10 000 p.p.m. or greater) induced flower formation in certain lines. Stem elongation increased with GA3 concentration and with plant age and was much greater on flowering plants than on non-flowering ones. [For previous related work see HcA 41, 4400.]. (Abstract retrieved from CAB Abstracts by CABI’s permission)

The Bolting and Flowering of Chondrilla Juncea L. as Influenced by Temperature and Photoperiod

1968 ◽  
Vol 21 (5) ◽  
pp. 883 ◽  
Author(s):  
O H Caso ◽  
NP Kefford
Keyword(s):  
Gibberellic Acid ◽  
Acid Treatment ◽  
Stem Elongation ◽  
Controlled Conditions ◽  
Effects Of Temperature ◽  
Bolting And Flowering ◽  
Gibberellic Acid Treatment ◽  
Chondrilla Juncea

O. juncea plants were grown in a variety of controlled conditions to determine effects of temperature, photoperiod, and gibberellic acid treatment on stem elongation (bolting) and flowering.

Gibberellic acid and the light inhibition of stem elongation

Planta ◽  
1967 ◽  
Vol 75 (4) ◽  
pp. 291-308 ◽  
Author(s):  
Daphne Vince
Keyword(s):  
Gibberellic Acid ◽  
Stem Elongation ◽  
Light Inhibition

Stem elongation of ornamental bromeliad in tissue culture depends on the temperature even in the presence of gibberellic acid

2017 ◽  
Vol 39 (10) ◽  
Author(s):  
Daniela Soares dos Santos ◽  
Poliana Cardoso-Gustavson ◽  
Catarina Carvalho Nievola
Keyword(s):  
Tissue Culture ◽  
Gibberellic Acid ◽  
Stem Elongation

scholarly journals Gibberellic Acid Sensitivity among Common Bean Cultivars (Phaseolus vulgaris L.)

HortScience ◽  
2012 ◽  
Vol 47 (5) ◽  
pp. 637-642 ◽  
Author(s):  
Alexander D. Pavlista ◽  
Dipak K. Santra ◽  
James A. Schild ◽  
Gary W. Hergert
Keyword(s):  
Gibberellic Acid ◽  
Common Bean ◽  
Stem Elongation ◽  
Full Range ◽  
Cultivar Differences ◽  
Individual Response ◽  
Maximum Height ◽  
Type I ◽  
Dry Bean ◽  
Acid Sensitivity

To lower seed yield loss from directly harvested common bean or dry bean, height of the lower pod-bearing nodes needs to be raised. The objective of this greenhouse study was to stimulate lower stem elongation by gibberellic acid (GA3) of dry bean cultivars. Seeds of cv. Matterhorn, erect indeterminate Type II, and cv. Poncho, prostate indeterminate Type III, were dipped in GA3 at 62.5 to 16,000 ppm and planted. After 14 d, the height of the unifoliate and first trifoliate nodes showed maximum stimulation of stem elongation by 1000 ppm GA3 for ‘Poncho’ and by 2000 ppm for ‘Matterhorn’. Application of 1 mL of GA3 at 0.031 to 2048 ppm to newly expanded unifoliate leaves showed cultivar differences. Whereas ‘Matterhorn’ was promoted at 64 ppm and reached a maximum height by 512 ppm GA3, ‘Poncho’ was promoted at 0.25 ppm and reached a maximum height by 8 ppm GA3. Flowering of ‘Matterhorn’ was unaffected by GA3; flowering of ‘Poncho’ was completely inhibited by 128 ppm. The sensitivity difference of cultivars was verified with other cultivars. Type I cultivars, which are all determinate, showed a full range of GA3 sensitivity. Dry bean cultivars may be regrouped based on the GA3 dose to which they respond. Individual response to GA3 rates of dry bean cultivars needs to be predetermined using a short-term, 2–3 weeks, greenhouse bioassay before field use of GA3.

scholarly journals Light Intensity Affects Gibberellic Acid Content in Kentucky Bluegrass

HortScience ◽  
2003 ◽  
Vol 38 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Z.G. Tan ◽  
Y.L. Qian
Keyword(s):  
Gibberellic Acid ◽  
Poa Pratensis ◽  
Stem Elongation ◽  
Leaf Tissue ◽  
Acid Ethyl Ester ◽  
Shoot Elongation ◽  
Kentucky Bluegrass ◽  
Gas Chromatography Mass Spectrometry ◽  
Grass Species ◽  
Light Intensities

Turfgrasses grown under low light conditions generally exhibit increased shoot elongation. Gibberellic acids (GAs), GA1 in particular, promote stem elongation in grass species. GA20 is the immediate precursor of GA1. However, a direct quantitative measurement of GA1 and GA20 has not been reported for turfgrass under different light intensities. This study was conducted in a greenhouse to quantify the endogenous levels of GA1 and GA20 of `KenblueTimes', `Livingston', and `NuGlade' Kentucky bluegrass (Poa pratensis L.) under two light intensities with and without trinexapacethyl (TE) application. GA1 and GA20 content in leaf tissue were analyzed using gas chromatography-mass spectrometry with deuterium-labeled GA1 and GA20 as internal standards. Light reduction of 73% under greenhouse conditions increased GA1 by 44% to 47% and GA20 by 16% to 50%. `NuGlade' had a GA1 content 20% lower than that of `Kenblue', suggesting that the dwarf characteristics of `NuGlade' may be related to its low GA1 content. The application of TE (0.1 kg·ha-1) reduced GA1 concentration by 47%, but increased GA20 concentration by 146%, supporting the contention that TE inhibited GA1 biosynthesis by blocking the conversion of GA20 to GA1. Chemical names used: 4-(cyclopropyl- -hydroxy-methylene)-3,5-dioxo-cyclohexanecarboxylic acid ethyl ester (trinexapac-ethyl); gibberellic acid (GA).

Responsiveness of Three Tayota (Sechium edule) Types to Gibberellic Acid Treatment

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 494b-494
Author(s):  
J. P. Morales-Payan
Keyword(s):  
Gibberellic Acid ◽  
Acid Treatment ◽  
Stem Elongation ◽  
Dry Weight ◽  
Growth Stages ◽  
Shoot Dry Weight ◽  
Sechium Edule ◽  
Randomized Design ◽  
Practical Standpoint ◽  
Gibberellic Acid Treatment

Container experiments were conducted in the Dominican Republic to determine the effects of gibberellic acid applications on the `White', `Green', and `Spiny Green' tayota (Sechium edule) Dominican types. Young plants (25 cm in length) of the three types were sprayed with aqueous solutions of gibberellic acid at rates 0, 50, 100, 150, and 200 parts per million. A completely randomized design with seven replications was utilized. Plant height and shoot dry weight were determined 30 days after treatment and resulting data was subjected to analysis of variance and regression analysis. Gibberellic acid treatment significantly increased tayota shoot dry weight and stem elongation. Both variables responded with similar patterns to gibberellic acid application. A linear regression (Y = 39.82 + 0.214 X, r2 0.95) described stem elongation as a function of gibberellic acid rates. Results show that gibberellic acid can be effectively used in either tayota type to promote early stem elongation. From a practical standpoint, due to the climbing nature of Sechium edulis, rapid stem elongation could be instrumental in a more rapid establishment of the crop vines in the trellis system, as well as to provide the crop with an advantage on weeds competing for light during the usually critical early growth stages.

scholarly journals Techniques to modify cluster architecture and their effect on the viticultural performance of the Sauvignon Blanc cultivar

2020 ◽  
Vol 55 ◽  
Author(s):  
Alberto Fontanella Brighenti ◽  
Bruno Munhoz ◽  
Douglas André Würz ◽  
Mateus da Silveira Pasa ◽  
Felipe Augusto Moretti Ferreira Pinto ◽  
...  
Keyword(s):  
Gibberellic Acid ◽  
Vitis Vinifera ◽  
Full Bloom ◽  
Sauvignon Blanc ◽  
Cluster Architecture ◽  
Yield And Quality ◽  
Cluster Compactness ◽  
Bunch Rot ◽  
Prohexadione Calcium

Abstract: The objective of this work was to evaluate the effect of different techniques to modify grape cluster architecture on the incidence and severity of botrytis bunch rot, as well as on the viticultural performance of the 'Sauvignon Blanc' grapevine (Vitis vinifera). Associated with fungicides, four treatments were tested: control, 30 ppm gibberellic acid sprayed at full bloom, 1,000 ppm prohexadione calcium sprayed at full bloom, and berry thinning at the stage of beginning of berry touch. The experiment was carried out in the 2015, 2016, and 2017 vintages. Clusters were treated with fungicides during the stages of full bloom, beginning of berry touch, veraison, and around 15 days before harvest. Berry thinning does not cause losses in the yield and quality of 'Sauvignon Blanc', and, despite having little effect on cluster architecture, is effective in reducing the incidence and severity of Botrytis cinerea. Prohexadione calcium improves grape phenolic maturation, is effective in reducing the incidence and severity of B. cinerea, and reduces cluster compactness by decreasing berry diameter. The application of gibberellic acid spray at full bloom is not recommended because it decreases yield and bud fertility and increases berry susceptibility to B. cinerea infection.

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