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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

Sistema de an?lise de pl?ntulas (SAPL) na determina??o do vigor de sementes de Moringa oleifera Lam

Reis, Jo?o Ant?nio Vieira dos 17 February 2017 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T23:08:22Z No. of bitstreams: 1 JoaoAntonioVieiraDosReis_DISSERT.pdf: 771259 bytes, checksum: f7719e93688f59ba1790e2d8837d5405 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-12T19:36:20Z (GMT) No. of bitstreams: 1 JoaoAntonioVieiraDosReis_DISSERT.pdf: 771259 bytes, checksum: f7719e93688f59ba1790e2d8837d5405 (MD5) / Made available in DSpace on 2017-06-12T19:36:20Z (GMT). No. of bitstreams: 1 JoaoAntonioVieiraDosReis_DISSERT.pdf: 771259 bytes, checksum: f7719e93688f59ba1790e2d8837d5405 (MD5) Previous issue date: 2017-02-17 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A utiliza??o de t?cnicas que envolvam a an?lise computadorizada de pl?ntulas na avalia??o da qualidade de lotes de sementes tem apresentado alta efici?ncia. O Sistema de An?lise de Pl?ntulas (SAPL) permite efetuar a an?lise relativamente r?pida de pl?ntulas destacam-se por sua precis?o e objetividade, em compara??o com a maioria dos testes para avalia??o rotineira da qualidade das sementes. Assim, o objetivo deste trabalho foi verificar a efici?ncia do Sistema de An?lise de Pl?ntulas (SAPL) na detec??o de diferen?as de vigor entre lotes de sementes de moringa, em compara??o as informa??es fornecidas por testes de vigor tradicionalmente utilizados. Para tanto, determinou-se o teor de ?gua das sementes e a sua qualidade fisiol?gica pelos testes de germina??o, primeira contagem de germina??o, ?ndice de velocidade de germina??o, massa seca de pl?ntulas, emerg?ncia, ?ndice de velocidade de emerg?ncia, envelhecimento acelerado tradicional, envelhecimento acelerado com solu??o salina e utilizando-se o SAPL. O delineamento foi o inteiramente casualizado com quatro repeti??es de 30 sementes. Os par?metros obtidos na an?lise computadorizada (comprimento da parte a?rea, comprimento da raiz prim?ria, comprimento total de pl?ntula, ?ndice de crescimento, ?ndice de uniformidade e ?ndice de vigor) com o software SAPL foram eficientes para diferenciar os lotes de sementes em compara??o com os testes tradicionalmente utilizados, n?o somente entre lotes de baixo e alto vigor, mas tamb?m para aqueles de qualidade intermedi?ria. / The use of techniques involving a computerized analysis of seedlings in the evaluation of seed lots quality has shown a great efficiency. The Seedling Analysis System (SAPL) allows carrying out the relatively fast seedling analysis, standing out its precision and objectivity in comparison to most of the tests used for routine seed quality evaluation. Thus, the aim of this work was to verify the efficiency of SAPL in the detection of vigor differences between moringa seed lots in comparison to information provided by usual vigor tests. Therefore, water content and the physiological quality of seeds by germination test, first count test, germination speed index, emergency speed index, usual accelerated aging test, and accelerated aging test using saline solution were determined, as the use of SAPL. The experimental design was completely randomized using four replicates of 30 seeds. The parameters obtained in the computerized analysis (shoot and primary root lengths, seedling total length, and growth, uniformity, and vigor index) using the SAPL software were efficient to distinguish seed lots in comparison to usual tests, not only among lots showing low and high vigor, but also to those showing intermediate quality.

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