scholarly journals Effect of Plant Growth Regulators, Organic, Inorganic and Biofertilizer on Seed Yield and Vigour Characters in Green Gram (Vigna radiata L. wilczek)

Author(s):  
Sudheer Pathak ◽  
Neha Srivastava ◽  
G. R. Lavanya

A facile method has been developed for the first time for the synthesis of graphene quantum dots using The obroma cacao (cocoa seeds) by hydrothermal method. The structure and morphology of ensuring product was characterized by UV, FTIR, X-ray Diffraction (PXRD) and TEM and SAED pattern. Then anti-microbial, anti-oxidant and anti-cancer activities of T. cacao mediated graphene quantum dots were analyzed. Further investigations were made on the use of T. cacao mediated graphene quantum dots for growth enhancement in green gram (Vigna radiate). CSE-GQDs (Cocoa seed extract-Graphene quantum dots) showed greatest antimicrobial activity against the Staphylococcus aureus, Pseudomonas aeroginosa, Streptococcus mutans, Salmonella sp, Escherichia coli, Microsporum gypseum, Trichophyton sp. The results of antioxidant activity of the CSE- GQDs evaluated using DPPH scavenging assays indicates that the CSE- GQDs possess a higher scavenging activity. The cytotoxicity studies showed that the synthesized CSE- GQDs exhibited a dose dependent toxicity on human breast cancer (MCF-7) cell lines. The IC50 value for MCF-7 cells is found to be 31.2µg/ml of CSE- GQDs, where a 50% noticed cell death is observed. The germination rate of green gram seeds significantly increased after treatment with higher CSE-GQDs. Our investigations open up the opportunity to use graphene quantum dots as plant growth regulators that can be used in a variety of other food plants for high yield.


Author(s):  
M.P. Rolston ◽  
B.L. Mccloy ◽  
N.B. Pyke

Seed yields of ryegrass and tall fescue have increased rapidly over the last seven years; the best farm yields are now reaching 3000 kg/ha, up from 2000 kg/ha. These increases are largely due to the adoption of technologies developed from research funded from grower crop levies and effective technology transfer programmes. The key technologies are (1) the adoption of trinexapac ethyl (TE), a plant growth regulator that blocks gibberellic acid biosynthesis and reduces lodging; and (2) new generation triazole and strobilurin fungicides that give improved disease control and extend the period that green leaf area is maintained on crops. Seed yield data from 10 ryegrass and 6 tall fescue trials with TE, and from 13 fungicide trials are presented. The average seed yield increase in tall fescue treated with 200 g TE/ha and ryegrass with 400 g TE/ha was 67% and 50% respectively. In fungicide trials, seed yields in forage perennial ryegrass were increased by 20% and in turf ryegrass by 42%. A survey of growers indicated 95% of ryegrass growers and 100% of tall fescue growers had adopted the use of TE three years after the commercial release of the product. Keywords: fungicides, plant growth regulators, ryegrass, seed yield, strobilurin, tall fescue, triazole, trinexapac


Author(s):  
S. Sajjan Ashok ◽  
Pramoda . ◽  
T.A. Malabasari ◽  
T.R. Shashidhar

Field experiments were conducted in the Department of Seed Science and Technology, University of Agricultural Sciences, Dharwad, Karnataka during 2016-17. The field experiment consisted of 18 treatment combinations involving two seasons viz., kharif 2016 and rabi 2016-17 and plant growth regulators viz., G1: Control, G2 : GA3 @ 50 ppm, G3 : NAA @ 40 ppm, G4 : Cycocel @ 100 ppm, G5 : Mepiquat chloride @ 50 ppm, G6 : Nitrobenzene @ 200 ppm, G7: TIBA @ 50 ppm, G8 : Brassinosteroids @ 200 ppm, G9 : GA3 @ 5 ppm + IAA @ 5 ppm and experiment was laid out in Factorial RBD with three replications. The more number of pods per plant (117.19), number of seeds per pod (4.25), dry pod yield per plant (118.53 g), dry pod yield per plot (2.07 kg), seed yield per plant (114.48 g), pod length (5.66 cm), seed yield per plot (2.32 kg), seed yield per hectare (1,281 kg) was recorded in rabi season than kharif. Among the plant growth regulators more number of pods per plant (120.44), number of seeds per pod (4.44), dry pod yield per plant (120.17 g), dry pod yield per plot (2.21 kg), seed yield per plant (117.60 g), seed yield per plot (2.55 kg), seed yield per hectare (1,360 kg) and pod length (6.04 cm) was recorded in NAA @ 40 ppm, followed by nitrobenzene @ 200 ppm, (119.78, 4.35, 119.54, 2.11, 116.76, 2.42, 1,299 kg and 5.93 cm, respectively). The interaction effect was found to be non-significant for majority of the characters studied. However, foliar spray of NAA @ 40 ppm during rabi season recorded higher crop growth, seed yield and quality parameters as compared to control.


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