Exogenous Application of Ethrel and Gibberellic Acid Stimulates Physiological Growth of Late Planted Sugarcane with Short Growth Period in Sub-tropical India

2017 ◽  
Vol 36 (2) ◽  
pp. 472-486 ◽  
Author(s):  
Rama Kant Rai ◽  
Nidhi Tripathi ◽  
Deeksha Gautam ◽  
Pushpa Singh
Keyword(s):  
Gibberellic Acid ◽  
Growth Period ◽  
Exogenous Application ◽  
Late Planted Sugarcane

scholarly journals Effect of gibberellic acid and urea on the growth of pineapple fruit (Ananas comosus (L.) Merr.)

2019 ◽  
Vol 3 (2) ◽  
pp. 82-89
Author(s):  
Le Van Ut ◽  
Vo Thi Bach Mai
Keyword(s):  
Gibberellic Acid ◽  
Fruit Quality ◽  
Quality Index ◽  
Sugar Content ◽  
Fruit Size ◽  
Growth Period ◽  
Fruit Weight ◽  
Ananas Comosus ◽  
High Concentration ◽  
Pineapple Fruit

Effects of gibberellic acid (GA3) and urea on Queen pineapples (Ananas comosus (L.) Merr.) growth in the field were discussed in this study. Pineapples were sprayed with GA3 (at the concentration of 1, 5, 10, 20, 40, 60, 80 and 100 mg.L-1) or urea (at the concentration of 1, 5, 10, 15, 20, 25 and 30 g.L-1) on day 0 and day 3 at the beginning of growth period (50% dried flowers). Fruits were sampled every 15 days from day 0 to day 75 for assessment on fruit weight, fruit size, and fruit quality. Besides, fruits (which were sprayed with GA3 at the concentration of 40 mg.L-1 or urea at the concentration of 15 g.L-1) were sampled on the 15th day from the day which processed to determine the size of cells. The results showed that the treatments with four highest concentration of GA3 (40, 60, 80 and 100 mg.L-1) or urea (15, 20, 25 and 30 g.L-1) significantly increased fruit weights and fruit sizes. In addition, the treatments of GA3 in high concentration (40 - 100 mg.L-1) stimulated the increase of sugar content and vitamin C content in the fruit flesh compared to the control. The treatments of urea at different concentrations did not alter the fruit quality index. Exogenous GA3 at the concentration of 40 mg.L-1 or urea at the concentration of 15 g.L-1 stimulated the increase of fruit weight without decreasing the fruit quality. In which, exogenous GA3 at concentration 40 mg.L-1 increased the fruit weight by enlarging flesh cell.  

Effect of decapitation and exogenous application of gibberellic acid (GA3) and cytokinin (CK) on some physiological characteristics of stevia

2018 ◽  
Vol 64 (2) ◽  
pp. 50
Author(s):  
Mehrangiz Akbari ◽  
Mohammad Eghbal Ghobadi ◽  
Mokhtar Ghobadi ◽  
Said Jalali-Honarmand ◽  
Mohsen Saeidi
Keyword(s):  
Gibberellic Acid ◽  
Physiological Characteristics ◽  
Exogenous Application

scholarly journals Exogenous Application of Gibberellic Acid Improves the Maize Crop Productivity Under Scarce and Sufficient Soil Moisture Condition

2017 ◽  
Vol 50 (4) ◽  
pp. 65-73 ◽  
Author(s):  
N. Sarwar ◽  
O. Farooq ◽  
K. Mubeen ◽  
A. Wasaya ◽  
W. Nouman ◽  
...  
Keyword(s):  
Growth Rate ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Gibberellic Acid ◽  
Leaf Area ◽  
Crop Yield ◽  
Growth Regulators ◽  
Drought Condition ◽  
Irrigation Level ◽  
Exogenous Application

AbstractDrought stress creates imbalance or deficiency of some growth regulators in plants, which leads toward reduced crop yield. Gibberellic acid is one of the most important growth regulators in plants, which improve drought tolerance in plants under optimum concentration. A field experiment was conducted under exogenous application of gibberellic acid under normal or drought condition and with or without gibberellic acid application. Crop growth and yield parameters were assesses during the experimentation. Study revealed that crop reduced growth in term of leaf area index (LAI), leaf area duration (LAD), crop growth rate (CGR), net assimilation rate (NAR) and total dry matter (TDM) under drought condition, while these parameters were improved with gibberellic acid application. Similary, improved growth rate resulted in better performance of yield attributes (cob length, cob diameter, grains per cob, grain weight and yield). Gibberellic acid application improved the crop performance at optimum irrigation, as well as under reduced irrigation. Although highest crop yield was recorded with gibberellic acid application under optimum irrigation level, while its application under drought stress improved crop tolerance and resulted in better crop yield, similar to optimum irrigation level. Exogenous application of gibberellic acid not only improved the drought tolerance in maize, but also increased the crop yield under normal condition.

scholarly journals Exogenous Application of Gibberellic Acid Improves Flowering in Kalanchoë

HortScience ◽  
2018 ◽  
Vol 53 (3) ◽  
pp. 342-346 ◽  
Author(s):  
Lívia Lopes Coelho ◽  
Amalia Fkiara ◽  
Kathryn Kuligowska Mackenzie ◽  
Renate Müller ◽  
Henrik Lütken
Keyword(s):  
Gibberellic Acid ◽  
Cut Flower ◽  
Cut Flowers ◽  
Breeding Programs ◽  
Exogenous Application ◽  
Potted Plants ◽  
Lack Of Information ◽  
Kalanchoe Pinnata ◽  
Inducing Factors

Kalanchoë is an economically important genus comprising numerous potted plants and recently is also emerging as cut flowers. However, the lack of information about flower-inducing factors limits the number of species that can be used in commercial production and breeding programs. Therefore, the aim of this study was to investigate the effects of exogenous application of gibberellic acid (GA3) on flower induction and flowering quality of Kalanchoë longiflora and Kalanchoë pinnata. The experiment was conducted under a short day (SD) photoperiod with a day temperature of 22 °C and a night temperature of 15 °C for 8 weeks. The treatments consisted of four applications of either 0.25 or 0.50 μg of GA3 per plant per week, providing a total of 100 μg or 200 μg/plant and 0 μg/plant for the control. The volume of 100 μL of GA3 solution containing 1% agarose was applied to the shoot apex using a pipette. For both species, flowering was enhanced by the GA3 treatments compared with the control plants. Gibberellin-treated plants flowered earlier, produced more inflorescences, and exhibited an increased number of flowers compared with the control plants. Moreover, the GA3 treatments in K. longiflora delayed the appearance of wilted flowers. Plant height increased in plants that received GA3, but the number of nodes did not differ from the control plants. Thus, we conclude that the application of GA3 improves flowering of Kalanchoë species and can be a useful tool for the production of cut flower cultivars.

scholarly journals Investigation of improving the drought tolerance in persian petunia (Petunia sp.) by exogenous application of salicylic acid and gibberellic acid

2021 ◽  
Vol 20 (1) ◽  
pp. 37-48
Author(s):  
Morteza Goldani ◽  
Ali Dolatkhahi ◽  
Mahdi Parsa ◽  
Navid Vahdati ◽  
Zahra Rasouli
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Stomatal Conductance ◽  
Gibberellic Acid ◽  
Water Deficit ◽  
Abiotic Stress Tolerance ◽  
Foliar Spray ◽  
Field Capacity ◽  
Exogenous Application ◽  
Four Levels

Plants respond to water deficit through several mechanisms. Among which, plant hormones play an important role in induction to abiotic stress tolerance. To bring this issue closer, an experiment was conducted to examine whether salicylic acid (SA) and gibberellic acid (GA3) exogenous applications through foliar spray could alleviate detrimental effects of water deficit on Persian petunia. Treatments consisted of water stress in three levels: 100% field capacity (F.C.) as control, 50, and 25% F.C linked with different concentrations of GA3 and SA sprayed at four levels (0, 100, 200 and 300 mg L–1). Results showed that the dry and fresh biomass, leaf area, photosynthetic pigments levels, relative water content (RWC) and the total number of flowers were significantly (P≤0.01) reduced in response to water deficit. However, free proline concentration and root-to-shoot ratio significantly increased in stressed plants. Plants subjected to severe water stress (25% F.C.), exhibit about 66% stomatal conductance rate lower than the plants grown at 100% F.C. The results showed that SA-treated plants exhibited reduced negative effect of water stress on most of the qualitative and quantitative attributes compared to control, while GA3 application had little impact on studied traits. Importantly, stomatal conductance and RWC were improved in water-stressed plants treated with SA. Moreover, SA-treated plants produced more flowers at all water deficit levels compared to GA3 sprayed plants. It can be concluded that Persian petunia plants respond to water deficit through adaptive changes at biochemical and morphological levels and that adverse effects of water deficit could be alleviated by exogenous application of SA.

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