Electrical conductivity test for the quality assessment of chickpea seeds

?rea de concentra??o: Produ??o Vegetal.O presente trabalho foi realizado com apoio da Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior ? Brasil (CAPES) ? C?digo de Financiamento 001.Submitted by Nivaldo Melo (nivaldo.melo@ufvjm.edu.br) on 2019-11-18T16:52:05Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lucas_souza_oliveira.pdf: 1097597 bytes, checksum: f51ce9798b9266f58f697ac95efe5831 (MD5)Approved for entry into archive by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2019-11-19T17:16:42Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lucas_souza_oliveira.pdf: 1097597 bytes, checksum: f51ce9798b9266f58f697ac95efe5831 (MD5)Made available in DSpace on 2019-11-19T17:16:43Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) lucas_souza_oliveira.pdf: 1097597 bytes, checksum: f51ce9798b9266f58f697ac95efe5831 (MD5) Previous issue date: 2019Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)O gr?o-de-bico (Cicer arietnum L.) ? uma leguminosa com alto teor de prote?na e valores nutricionais, sendo comercializada no mundo inteiro. No entanto, informa??es sobre metodologias para avalia??o da qualidade de sementes dessa cultura s?o escassas, tornando fundamental uma tecnologia capaz de possibilitar a avalia??o r?pida e precisa da germina??o e vigor. Dentre os testes de vigor, destaca-se o de condutividade el?trica por ser r?pido, eficaz e de baixo custo. Diante disso, objetivou-se com esta pesquisa a avalia??o da qualidade fisiol?gica de sementes de gr?o-de-bico atrav?s do teste de condutividade el?trica. Foram utilizados quatro lotes da cultivar BRS Aleppo das safras 2015 e 2017 provenientes da Embrapa Hortali?as. A caracteriza??o fisiol?gica das sementes foi feita utilizando os testes de umidade, peso de mil sementes, germina??o, primeira contagem de germina??o, IVG, emerg?ncia de pl?ntulas em campo, estande inicial e IVE e para a determina??o dos per?odos de embebi??o a serem testados no teste de condutividade el?trica foi constru?da a curva de embebi??o. No teste de condutividade el?trica as sementes foram submetidas aos tempos de 4h, 8h, 12h e 16h pelos volumes de ?gua destilada e deionizada de 50mL, 75mL ,100mL e 125 mL, sob a temperatura de 25?C. A partir de 8h foi poss?vel se obter dois n?veis de vigor entre os lotes, na maioria dos tratamentos o lote 2 foi classificado como inferior aos demais. Conclui-se que o teste de condutividade el?trica, utilizando 25 sementes em 75 ml de ?gua destilada e deionizada por 8 horas na temperatura de 25?C ? eficiente para a diferencia??o dos lotes de sementes de gr?o-de-bico, cultivar BRS Aleppo.Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Produ??o Vegetal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2019.Chickpea (Cicer arietnum L.) is a legume with high protein content and nutritional values and is marketed worldwide. However, information on methodologies for evaluating the seed quality of this crop is scarce, making it fundamental to have a technology capable of rapid and accurate evaluation of germination and vigor. Among the tests of vigor, it stands out the one of electrical conductivity for being fast, effective and of low cost. Therefore, the objective of this research was the evaluation of the physiological quality of chickpea seeds through the electrical conductivity test. Four lots of cultivar BRS Aleppo from the 2015 and 2017 harvests from Embrapa Hortali?as were used. The physiological characterization of the seeds was performed using the tests of moisture, weight of one thousand seeds, germination, first germination count, germination speed index, emergence of field seedlings, first emergence count and the emergency speed index and to determine the soaking periods to be tested in the electrical conductivity test, was constructed the embedding curve. In the electrical conductivity test the seeds were submitted to the times of 4h, 8h, 12h and 16h for the volumes of distilled and deionized water of 50mL, 75mL, 100mL and 125 mL, under the temperature of 25?C. From 8h it was possible to obtain two levels of vigor between the lots, in most of the treatments lot 2 was classified as inferior to the others. It was concluded that the electrical conductivity test, using 25 seeds in 75 ml of distilled water and deionized for 8 hours at 25?C, is efficient for the differentiation of the seed lots of chickpea, BRS Aleppo