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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Matura??o de frutos e viabilidade de sementes de Physalis ixocarpa Brot. ex Hormen

Barroso, Nat?lia dos Santos 02 June 2015 (has links)
Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-01-26T21:38:02Z No. of bitstreams: 1 Disserta??o - Nat?lia Barroso - vers?o final Matura??o de frutos e viabilidade de sementes de Phy.pdf: 843714 bytes, checksum: 8ed525d974c00cbb3b373b4f5f92c3f3 (MD5) / Made available in DSpace on 2016-01-26T21:38:02Z (GMT). No. of bitstreams: 1 Disserta??o - Nat?lia Barroso - vers?o final Matura??o de frutos e viabilidade de sementes de Phy.pdf: 843714 bytes, checksum: 8ed525d974c00cbb3b373b4f5f92c3f3 (MD5) Previous issue date: 2015-06-02 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The Physalis genus occupies a prominent position in the Solanaceae family for fruit production for consumption in natura, by presence of poly-oxygenated metabolites and vitasteroids in their tissues, especially physalins, which are attributed some pharmacological activities. Due to large amount of seeds produced by fruits and the fact these seeds germinate easily in different environments, the species of this genus become easy grow. Predicting the ideal point of harvest can lead to increased exploration capabilities of this feature also contributes to obtaining more vigorous seeds for use in studies of propagation and conservation of this important genus. This paper aims to monitor the maturation of fruits and seed viability during fruit development stages. During flowering, the flowers in anthesis were tagged daily until obtaining the number of enough fruit for evaluation. P. ixocarpa fruit were collected at 15, 25, 35, 45, 55 days after anthesis (DAA). In a sample of 50 fruits, it is measuring the length, diameter, fresh weight, color, soluble solids, number and weight of seeds per fruit. The color and pigment content calyx were evaluated and correlated. To determine the quality of seeds at different times of maturation, newly harvested seeds and after drying at room were evaluated for water content, dry mass, germination and seedling emergence. The fruits of P. ixocarpa have more pronounced changes in color only in the calyx. Changes occur in the physical and chemical characteristics to 35 DAA, not differing significantly from the following stages. The physiological seed quality was highest at 45 DAA, indicating this is the best time of maturity for harvest seeds, when the calyx is completely or partially broken and has the yellow green and light yellow brown color and dark green fruit. / O g?nero Physalis ocupa lugar de destaque na fam?lia Solanaceae pela produ??o de frutos para consumo in natura e pela presen?a de metab?litos poli-oxigenados e vitaester?ides em seus tecidos, com ?nfase para as fisalinas, ?s quais se atribuem v?rias atividades farmacol?gicas. Devido a grande quantidade de sementes produzidas pelo fruto e o fato destas sementes germinarem facilmente em diversos ambientes, as esp?cies desse g?nero tornam-se de f?cil cultivo. Predizer o ponto ideal de colheita pode levar ao aumento da capacidade de explora??o desse recurso e contribuir para a obten??o de sementes mais vigorosas para serem utilizadas em estudos de propaga??o e conserva??o desse importante g?nero. Este trabalho tem como objetivo acompanhar a matura??o dos frutos e a viabilidade das sementes durante os est?dios de desenvolvimento do fruto. Flores em antese foram etiquetadas diariamente at? a obten??o do n?mero de frutos suficientes para as avalia??es. Foram coletados frutos de P. ixocarpa aos 15, 25, 35, 45, 55 dias ap?s a antese (DAA). Em uma amostra de 50 frutos foram obtidos o comprimento, di?metro, peso fresco, cor, s?lidos sol?veis totais, n?mero e peso de sementes por frutos. Foram tamb?m avaliados e correlacionados a cor e teor de pigmentos do c?lice. Para determinar a qualidade das sementes em diferentes ?pocas de matura??o, as sementes rec?m-colhidas e ap?s secagem em ambiente foram avaliadas quanto ao teor de ?gua, massa de mat?ria seca, germina??o e emerg?ncia de pl?ntulas. Durante o processo de matura??o, os frutos de P. ixocarpa apresentam mudan?as mais acentuadas na colora??o do c?lice. Ocorrem mudan?as nas caracter?sticas f?sico-qu?micas at? os 35 DAA, ap?s essa fase n?o foram observadas altera??es significativas. A qualidade fisiol?gica das sementes foi m?xima aos 45 DAA, indicando que esta ? a melhor ?poca de matura??o para a colheita de sementes, quando o c?lice encontra-se completamente ou parcialmente rompido e apresenta a cor verde amarelado e marrom amarelado claro e fruto verde escuro.

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