RECUPERATION OF THE HIGH GERMINABILITY CONDITION OF PAPAYA SEED THROUGH PRIMING TECHNOLOGY AND BIOREGULATORS RECUPERACIÓN DE LA ALTA CAPACIDAD DE GERMINACIÓN DE LA SEMILLA DE PAPAYA MEDIANTE LA TECNOLOGÍA DE PREACONDICIONAMIENTO y BIORREGULADORES (original) (raw)
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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.
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.
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.
Analysis of the Effect of Scarification Process on Papaya (Carica papaya Lin.) Seeds Germination
Seed Dormancy and Germination [Working Title]
The presence of the aril (sarcotesta) in the papaya causes a slow and low germination, being necessary to break the state of dormancy. Calcium hydroxide that was applied in order to evaluate its scarifying effect was the objective. The sample consisted of 60 randomly selected fruits of hermaphrodite plants in a commercial production batch of approximately 1 ha (2222 plants) showing commercial maturity, of homogeneous size (±2 kg). The treatments were calcium hydroxide Ca(OH) 2 at three doses, dipping the seed for a period of 24 h; the standardized sodium hydroxide (NaOH) at 25% with a 15 min immersion time. The highest germination and vigor seeds were obtained applied Ca(OH) 2 with highly significant differences respect to the rest treatment, especially for the dose of 60 g l −1 of water for reasons of diminishing expenses. Significant correlations were found, with direct relations (aril and mechanical damage) and inverse relations (abnormal seeds) between the variables evaluated related to the vigor and germination of the seeds. It can be an ecological and not expensive methodology to improve the germination and vigor of papaya seeds in relation to other chemical compounds to scarify.
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...
Journal of Tropical Crop Science and Technology, 2019
This research aimed to carry out the response of seed germination and seedling growth of Calina papaya to the seed soaked in coconut water. It was conducted from April to June 2017. The study comprised two designs of experiment i.e. the Completely Randomized Design for the seed germination and the Randomized Complete Block Design for the seedling growth of papaya. There were 25 treatment combinations obtained and each treatment was replicated three times. The treatment factors comprised the concentration and the duration of seed soaked in coconut water. The results showed that the seed immersion in the 80% concentration of coconut water for 8 hours had the highest growth rate and vigour index. Meanwhile, the seed immersion in the 60% concentration of coconut water for 8 hours showed the highest percentage of germination. The seed immersion for eight hours resulted in the seedling growth of papaya.
Germination of "Solo" papaya seeds treated with plant hormones
Journal of Seed Science, 2014
The aim of this study was to investigate the effects of some plant hormones on germination of Carica papaya L. seeds of the "Solo" group taken from fruits at maturity stages 3 and 5 (50% and 75% of the fruit skin showing a yellow color). Then, the seeds were subjected to treatments involving different combinations of acid 2-chloroethylphosphonic - (CEPA 0; 5 x 10-7 and 5 x 10-4 M), GA3 (0; 10 and 50 mg / L) and KNO3 (0 or 1 M), and germination was assessed at the 14th and 30th days. Seeds from fruits at maturity stage 3 showed increased germination when treated with all growth regulators tested. KNO3 promoted a decrease in germination and in the germination speed index, especially in the seeds from stage 5. The plant hormones did not promote any increase in percentage of normal seedlings of papaya seeds. Two-Chloethylphosphonic acid (5 x 10-4 M) and the gibberellic acid applied alone in the seeds from satge 3 promoted an increase in the number of normal seedlings 14 days a...