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      Methodological adjustments to the tetrazolium test in coriander seeds

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          Abstract

          Abstract: The reduction in the time to perform the tetrazolium test is critical in decision making at pre and post-harvest of seeds. Thus, the objective of this study was to investigate different concentrations of the tetrazolium salt solution, temperatures, and staining times, to reduce the time for assessing the viability of coriander seeds by the tetrazolium test. The study was divided into two experiments conducted independently but sequentially. The seeds were evaluated for water content, germination, and viability in both experiments by the tetrazolium test. A completely randomized design was used, with four replications. For the tetrazolium test, the seeds were preconditioned by direct immersion in water for sixteen hours at 20 °C. In experiment I, the seeds were exposed to different concentrations of the tetrazolium salt solution (0.25; 0.5; 0.75; and 1.0%). In experiment II, different combinations of temperatures (35; 40; and 45 °C) and staining times (three, four, five, and six hours) were tested. Based on the findings, it was concluded that the best staining pattern of coriander seeds for performing the tetrazolium test is achieved by using the concentration of 0.5% tetrazolium salt solution for five hours at 40 °C.

          Translated abstract

          Resumo: A redução no tempo de execução do teste de tetrazólio é fundamental na tomada de decisão em pré e pós-colheita de sementes. Dessa maneira, o objetivo desta pesquisa foi estudar diferentes concentrações da solução do sal de tetrazólio, temperaturas e tempos de coloração, visando reduzir o tempo de avaliação da viabilidade de sementes de coentro pelo teste de tetrazólio. O estudo foi dividido em dois experimentos conduzidos de maneira independente, porém, sequencial. Em ambos os experimentos, as sementes foram avaliadas quanto ao teor de água, germinação e viabilidade pelo teste de tetrazólio. Utilizou-se delineamento experimental inteiramente casualizado, com quatro repetições. Para o teste de tetrazólio, as sementes foram pré-condicionadas por imersão direta em água, por dezesseis horas a 20 °C. No experimento I, as sementes foram expostas a diferentes concentrações da solução do sal de tetrazólio (0,25; 0,5; 0,75; e 1,0%). No experimento II, foram testadas diferentes combinações de temperaturas (35; 40; e 45 °C) e tempos de coloração (três; quatro; cinco; e seis horas). Com base nos resultados obtidos, concluiu-se que a melhor coloração de sementes de coentro para a realização do teste de tetrazólio é obtida utilizando a concentração da solução do sal de tetrazólio de 0,5% por cinco horas a 40 °C.

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          Most cited references27

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          Regras para análise de sementes

          (2009)
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            Fisiologia de sementes de plantas cultivadas

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              Tetrazolium: an important test for physiological seed quality evaluation

              Abstract: The production of high quality seeds is linked to a good quality control system. In this system, the tetrazolium test plays an important role in the evaluation of the seed physiological quality, not only due to its relative quickness, but also because of the amount of information that the test presents, such as the indexes of viability and vigor, in addition to providing the diagnosis of possible seed quality problems, such as mechanical damage, insect damage, pre-harvest weathering and deterioration during storage. The development of the test had its beginnings at the end of the 19th century, with great evolution in its concepts and methods in the 20th century. For that, there was the dedication of dozens of professionals in several countries, such as Germany, Japan, Russia, Serbia (former Yugoslavia), United States, Argentina and Brazil. The test indirectly measures the respiration processes that occur in the mitochondria of the cells that make up the tissues of the seeds. The reducing reaction of the solution of the tetrazolium salt under the action of dehydrogenase enzymes results in triphenylformazan, which presents a red carmin coloration. By the interpretation of the resulting staining patterns, seed viability, vigor and the main problems affecting seed quality are determined.
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                Author and article information

                Journal
                jss
                Journal of Seed Science
                J. Seed Sci.
                ABRATES - Associação Brasileira de Tecnologia de Sementes (Londrina, PR, Brazil )
                2317-1537
                2317-1545
                2021
                : 43
                : e202143026
                Affiliations
                [2] Ijuí Rio Grande do Sul orgnameUniversidade Regional do Noroeste do Estado do Rio Grande do Sul Brazil
                [1] Pelotas Rio Grande do Sul orgnameUniversidade Federal de Pelotas orgdiv1Faculdade de Agronomia Eliseu Maciel Brazil
                Article
                S2317-15372021000100125 S2317-1537(21)04300000125
                10.1590/2317-1545v43251969
                79a6ee13-a75c-42ec-b826-aee10bb5b1f8

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 07 May 2021
                : 23 July 2021
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 27, Pages: 0
                Product

                SciELO Brazil

                Categories
                Article

                Coriandrum sativum L.,teste rápido,viabilidade,quick test,viability

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