metodologia para a avaliação do vigor de sementes de tomate methodology for the evaluation of tomato seed vigor

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ID: 251214
2006
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Abstract
Os testes de vigor e o teste de germinação são componentes essenciais no controle de qualidade das empresas de produção de sementes. Com o objetivo de verificar a eficiência de diferentes testes de vigor na avaliação da qualidade de sementes de tomate (Lycopersicon esculentum Mill), cinco lotes do híbrido Saladinha foram submetidos aos seguintes testes: germinação; primeira contagem de germinação; emissão de raiz (56, 72, 80 e 96 horas após a instalação do teste de germinação); emergência de plântulas (substrato em bandejas de poliestireno); envelhecimento acelerado (1g de sementes mantidas a 41ºC por 48 e 72 horas); envelhecimento acelerado com solução salina saturada (mesmo procedimento do item anterior mas usando solução de NaCl, 40%) e condutividade elétrica (50 sementes em 25 mL de água destilada) em câmara a 25ºC e leituras após 2, 4, 6, 8 e 24 horas. A porcentagem de germinação e os testes de vigor da emissão de raiz primária (após 56 e 72 horas) e de condutividade elétrica apresentaram-se correlacionados com a emergência de plântulas. Porém, somente o teste de condutividade elétrica após 24 horas de embebição mostrou-se eficiente na avaliação do vigor das sementes de tomate, fornecendo informações semelhantes à emergência de plântulas.
The vigor and germination tests are essential components of seed quality control for the seed industry. In this research an adequate method to estimate vigor of different tomato seed lots was studied. Five lots of tomato seeds of 'Saladinha´ hybrid were submitted to the following tests: germination; first counting of germination; root emission (56, 72, 80, and 96 hours after sowing); seedling emergence on spedling trays; accelerated aging with water (1g of seeds maintained at 41°C during 48 and 72 hours); accelerated aging with salt (the same procedure of last item, but using 40% NaCl solution); electrical conductivity (50 seeds in 25 mL of distillated water at 25 °C and evaluations after 2, 4, 6, 8, and 24 hours of imbibition). The germination percentage and vigor tests of primary root emission (after 56 and 72 hours) and electrical conductivity were correlated with seedling emergence. However, only the electrical conductivity test after 24 hours of imbibition showed efficiency to evaluate vigor of tomato seeds taking similar information to seedling emergence.
Reference Key
martins2006horticulturametodologia Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Cibele C Martins;Márcia Maria Castro;Adriana M Seneme;João Nakagawa
Journal research on biomedical engineering
Year 2006
DOI
10.1590/S0102-05362006000300006
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362006000300006
Keywords
Electrical conductivity quality control accelerated aging vegetablesplant culture

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