Qualidade fisiol?gica de sementes de Moringa oleifera lam. por meio da an?lise de imagens

• Main Author: Noronha, Bruno Gomes de
• Other Authors: 09550796752
• Language: Portuguese
• Published: Universidade Federal do Rio Grande do Norte 2016
• Subjects: CNPQ::CIENCIAS AGRARIAS::RECURSOS FLORESTAIS E ENGENHARIA FLORESTAL; Germina??o; Viabilidade; Sementes florestais; Vigor; Raio-X
• Online Access: http://repositorio.ufrn.br/handle/123456789/19630

Submitted by Automa??o e Estat?stica ([e-mail]) on 2016-01-14T21:02:15Z No. of bitstreams: 1 BrunoGomesDeNoronha_DISSERT.pdf: 1776336 bytes, checksum: 1f763accb352077181c730c9182cbba6 (MD5) === Approved for entry into archive by Arlan Eloi Leite Silva ([e-mail]) on 2016-01-19T22:02:12Z (GMT) No. of bitstreams: 1 BrunoGomesDeNoronha_DISSERT.pdf: 1776336 bytes, checksum: 1f763accb352077181c730c9182cbba6 (MD5) === Made available in DSpace on 2016-01-19T22:02:12Z (GMT). No. of bitstreams: 1 BrunoGomesDeNoronha_DISSERT.pdf: 1776336 bytes, checksum: 1f763accb352077181c730c9182cbba6 (MD5) Previous issue date: 2014-12-16 === Os principais testes que avaliam a qualidade de sementes s?o destrutivos e exigem tempo, o que ? considerado longo e caro na cadeia que envolve a produ??o e comercializa??o das sementes. Deste modo, t?cnicas que viabilizem a redu??o do tempo que se gasta para se avaliar a qualidade de lotes de sementes ? muito favor?vel, do ponto de vista t?cnico, econ?mico e cient?fico. A an?lise de imagens de sementes tanto por meio de raio-X como por imagens digitais representam alternativas para estes setores, al?m de serem reproduz?veis e r?pidos, dando maior agilidade e autonomia ?s atividades dos sistemas de produ??o. O objetivo do trabalho foi analisar a morfologia interna de sementes desta esp?cie por meio de imagens radiografadas e a efici?ncia da determina??o do incremento de ?rea de sementes durante a embebi??o, por meio da an?lise de imagens e compar?-los com os resultados dos testes de germina??o e vigor na avalia??o da qualidade fisiol?gica das sementes. Para os testes de raio-X, as sementes foram expostas por 0,14 segundos ? radia??o de 40kV e 2,0 mAs. As imagens obtidas foram analisadas utilizando o programa ImageJ e postas a germinar posteriormente em c?mara do tipo B.O.D ? 27?C, no qual realizou-se a compara??o dos resultados obtidos nos testes de germina??o. Para a determina??o do teste de incremento de ?rea (I.A%), foram utilizadas sementes com e sem tegumento, mantidas em c?mara do tipo B.O.D a 15? e 20?C, as sementes foram fotografadas antes e ap?s o per?odo de embebi??o, os resultados foram comparados com os ?ndices de germina??o. Para o teste de raio-X, observouse que sementes com ?rea vazia superior a 20%, apresentaram maior percentual de pl?ntulas anormais. E a an?lise de incremento de ?rea, evidenciou que ? poss?vel ranquear os lotes ap?s 8 horas de embebi??o a 15?C de acordo com os testes de germina??o e vigor === Several tests that evaluate the quality of seeds are destructive and require time, which is considered long and expensive in the processes that involves the production and marketing of seed. Thus, techniques that allow reducing the time related to assess the quality of seed lots is very favorable, considering the technical, economic and scientific point of view. The techniques images of seed analyzed both by X-ray such as digital images, represent alternative for this sector, and are considered reproducible and fast, giving greater flexibility and autonomy to the activities of production systems. Summarily, the objective was to analyze the internal morphology of seeds of this species through x-rayed images and the efficiency of weed seed area increased during soaking through image analysis and compare them with the results of germination tests and force the evaluation of physiological seed quality. For X-ray tests, the seeds were exposed for 0.14 seconds at radiation 40kV and 2.0 mAs. Were analyzed images using the ImageJ program and subsequently put to germinate in B.O.D chamber at 27 ? C, in which there was the comparison of results for germination. To determine the test area increase (% IA), seeds were used with and without seed coat, maintained the B.O.D chamber at 15 ? to 20 ? C, the seeds were photographed before and after the soaking period, the results were compared to the germination rates. For the X-ray test, it was observed that seeds with empty area greater than 20%, showed a higher percentage of abnormal seedlings. And the area increment analysis showed that it is possible to rank the batch after 8 hours of imbibition at 15 ? C according to the germination and vigor tests