Efecto del ácido giberélico, tiempo y temperatura de almacenamiento sobre la germinación de semillas de chirimoya (Annona cherimola Mill.) bajo condiciones controladas
Cherimoya (Annona cherimola Mill.) is a crop with great agronomic and economic potential, considering that Ecuador has areas suitable for its production. However, this crop is poorly utilized, and its production is carried out with little technology, which affects its productivity. One of the proble...
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| Formato: | bachelorThesis |
| Idioma: | spa |
| Publicado em: |
2024
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| Assuntos: | |
| Acesso em linha: | https://dspace.unl.edu.ec/jspui/handle/123456789/29530 |
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Adicionar Tag | Resumo: | Cherimoya (Annona cherimola Mill.) is a crop with great agronomic and economic potential, considering that Ecuador has areas suitable for its production. However, this crop is poorly utilized, and its production is carried out with little technology, which affects its productivity. One of the problems of this species is the difficulty of sexual propagation, since seed germination is irregular. For this reason, the effect of the use of gibberellins, seed germination and initial growth of cherimoya was evaluated in this research. Fruits were collected at physiological maturity from the Yangana community in the province of Loja, and then the seeds were dried for a period of 2 days until they reached 12% humidity. The seeds were stored for monthly periods from 0 to 6 months under two temperature conditions: cold chamber (4 °C) and room temperature. Before sowing, seeds were treated with two doses of gibberellic acid (AG3): 0 ppm and 5000 ppm. At the end of the treatments, seed viability was evaluated by the tetrazolium test in the lab and seedling emergence. During the initial growth of the seedlings, height, number of leaves, stem diameter, length of the main root, number of secondary roots and vegetative cover were measured. The viability of seeds stored for a period of 0 to 6 months, the temperature did not affect the percentages obtained at the sixth month of seed storage in the two conditions evaluated. The emergence rate, regardless of the thermal storage condition, was maximized with applications of 5000 ppm AG3, exceeding 70% emergence in each period. Similarly, the initial development of cherimoya seedlings was favored with the application of 5000 ppm of AG3 in all the variables studied. |
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