The Response of Seed Germination and Seedling Growth Of Papaya (Carica papaya L.) CV CALINA to The Concentration Treatments and The Duration of Seed Soaked In Coconut Water (original) (raw)
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Journal of Applied Horticulture
The effect of three types of media and three levels of cocopeat were studied under agronet house conditions on germination and development of papaya seedling in a Complete Randomized Design with nine treatment combinations. The results showed that the medium of vermicompost + sand + pond soil (1 : 1 :1) with 2 cm cocopeat on the top (T 9) gave maximum speed of emergence (277.6 and 709.09), highest germination per cent (95.27 and 90.15), highest seed vigour (91.97 and 86.69), maximum germination index (7.15 and 7.22), germination value (17.33 and 33.83) and least time required for imbibtion (9.45 and 9.30 days) with minimum germination period (3.70 and 2.75 days), respectively in both years of experimentation. This medium was also found to be the best medium for the growth of papaya seedlings as it gave the highest parameters in terms of seedling height (23.43 cm and 22.67 cm), leaf area (349.33 cm 2 and 329.20 cm 2), number of leaves (10.02 and 9.67), stem girth (3.16 mm and 3.48 mm), number of roots (17.20 and 16.17), root length (10.20 cm and 9.67 cm), production of total biomass (5.02 g/plant and 4.77 g/plant) and least root/shoot ratio (0.22 and 0.20). This treatment also signifi cantly reduced the seedling mortality and produced maximum healthy seedlings (92.23 % and 93.15%) in minimum days (35.33 and 35.15) with highest net profi t (Rs. 3493.30/1000 seedling and Rs. 3448.00/ 1000 seedling) and B:C ratio (1.85 and 1.84) of seedlings, in both years (2008-09 and 2009-10), respectively.
Acta Horticulturae, 2010
Proper seed germination and seedling growth are most important considerations in successful seedling production under nursery technique of papaya cultivation. As the germination rate and seedling growth are affected by pre-sowing seed treatment of papaya with growth regulators and micronutrients, an experiment was carried out to identify a suitable treatment for getting better seed germination and seedling growth. Seeds were soaked with GA 3 (at 100, 150 and 200 ppm), sodium thiosulphate (at 20, 25 and 30 ppm) and micronutrient mixtures (4 different combinations of borax and zinc sulphate). Among the 11 treatments, GA 3 at 150 ppm was found best in respect to seed germination (72.2%) followed by sodium thiosulphate at 20 ppm (68.1%). But maximum seedling growth (52.32 cm seedling height and 5.18 cm seedling girth) was observed under GA 3 at 200 ppm. Borax at 0.50% along with ZnSO 4 at 0.25% also markedly improved the seedling growth.
Journal of Pharmacognosy and Phytochemistry, 2020
An experiment entitled “Role of pre-sowing seed treatment on germination behavior and seedling vigour of papaya (Carica papaya L.)” was conducted at Instructional cum Research Farm, College of Agriculture and Research Station, (IGKV), Bemetara, Chhattisgarh, India during the year 2018 and 2019. The experiment was laid out in Completely Randomized Design (CRD) with Seventeen different treatments replicated three times. The papaya seeds were sown in polybags which was filled with common media and treated with three different concentration of GA3 (viz., 50, 100 and 150) and 10 per cent cow urine with addition of bio-fertilizers in media soil. The results revealed that the application of treatment T11 (seed soaking with 150 ppm GA3 + 12 hours + azotobacter) was given early germination, rate of emergence as well as highest germination percentage, seed vigour index – I and seed vigour index – II. While, T15 (seed soaking with cow urine 10 (%) + 12 hours + azotobacter) had given maximum ro...
Postharvest Seed Treatments to Improve the Papaya Seed Germination and Seedlings Development
Tropical and Subtropical Agroecosystems, 2013
Practical technologies are required to preserve the viability of seeds particularly those known to be short-term viable species like Carica papaya (papaya). Papaya seeds were imbibed in water or chemical solutions (CaCl 2 10 -5 M, salicylic acid 10 -4 M, and gibberellic acid 10 -5 M) combined with inoculation of bacterial cell suspension to determine their effects on seed germination, plant growth, biomass production and chlorophyll accumulation. Seeds imbibed in water germinated 40 % more than control seeds and the time required to reaching 50 % seed germination was reduced two days in comparison to untreated seeds; however, the untreated seeds generated the largest (9.2 cm) and most vigorous seedlings. When seeds were imbibed in CaSG solution, a significant increase of the growth parameters such as fresh and dry biomass weight was observed. Seeds that were primed in gibberellic acid solution followed by inoculation with a mixture of Azospirillum brasilense cell suspension exhibited high seed germination (69 %), plant emergence (47 %) and seedling height (19 %), higher than the control. Differences in chlorophyll accumulation by seedlings were minimal.
An experiment was conducted to standardize the suitable media and type of the container for improving seed germination and seedling growth of papaya (Carica papaya L.) cv. Red Lady during 2019-20. Five different types of media and three types of containers were used for study. Present experiment was conducted in a Complete Randomized Block Design (Factorial) with 15 treatment combinations replicated thrice. The observations were recorded on seed germination attributes and seedling growth parameters. The results showed that the plastic containers were found better followed by earthen pots and polybags using media mixture of soil + cocopeat + vermicompost (1:1:1) for improving seed germination (94.76%). However, the maximum plant height (17.40 cm), number of leaves (12.03), stem girth (6.42 mm), leaf area (131.02 cm 2), root length (18.60 cm) and seedling survival (97.30%) was observed in the earthen pots having rooting media mixture made up of garden soil + cocopeat + vermicompost + FYM (1:1:1:1). The seed germination and plant growth parameters, root length and seedling survival was recorded in polybags.
Rapid loss of seed viability of Carica papaya L. (papaya) and its high commercial price impairs the availability of high quality seed to growers. Certified papaya seed cv. Maradol was utilized to define practical methodologies to restore the seed germination performance. Seed was submitted to: 1) hydropriming: 4 d of hydropriming rose seed germination up to 84%, 250% more than the untreated seeds; however, the seedlings generated from untreated seeds accumulated more biomass than the other treatments; 2) chemopriming: seeds treated 4 d in a 10 − −− −−5 M calcium chloride solution germinated 262% more than did the untreated seeds and in addition, the seedlings generated from treated seeds accumulated more biomass than the control seedlings. When seeds were treated either in the 10 − − − − −4 M salicylic acid or in Agromil S® solution high germination was accomplished 81 and 73% higher than the untreated seed respectively. All treated seeds germinated faster than the untreated ones.
Rapid loss of seed viability of Carica papaya L. (papaya) and its high commercial price impairs the availability of high quality seed to growers. Certified papaya seed cv. Maradol was utilized to define practical methodologies to restore the seed germination performance. Seed was submitted to: 1) hydropriming: 4 d of hydropriming rose seed germination up to 84%, 250% more than the untreated seeds; however, the seedlings generated from untreated seeds accumulated more biomass than the other treatments; 2) chemopriming: seeds treated 4 d in a 10 − − − − −5 M calcium chloride solution germinated 262% more than did the untreated seeds and in addition, the seedlings generated from treated seeds accumulated more biomass than the control seedlings. When seeds were treated either in the 10 − − − − −4 M salicylic acid or in Agromil S® solution high germination was accomplished 81 and 73% higher than the untreated seed respectively. All treated seeds germinated faster than the untreated ones.