TEST OF EXUDATE pH IN RICE SEEDS

Mariely de Abreu dos Santos; Izabela Cristina de Oliveira; Graziely Alves Nogueira; Josué Bispo da Silva; Ana Carina da Silva Cândido; Charline Zaratin Alves

doi:10.1590/1983-21252019v32n412rc

Authors

Mariely de Abreu dos Santos Department of Agronomy, Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, MS https://orcid.org/0000-0002-7419-0252
Izabela Cristina de Oliveira Department of Agronomy, Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, MS https://orcid.org/0000-0002-4666-801X
Graziely Alves Nogueira Department of Agronomy, Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, MS https://orcid.org/0000-0001-6985-3317
Josué Bispo da Silva Department of Biology, Universidade Federal de Mato Grosso do Sul, Três Lagoas, MS https://orcid.org/0000-0002-0867-5913
Ana Carina da Silva Cândido Department of Agronomy, Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, MS https://orcid.org/0000-0002-9230-4807
Charline Zaratin Alves Department of Agronomy, Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, MS https://orcid.org/0000-0001-6228-078X

DOI:

https://doi.org/10.1590/1983-21252019v32n412rc

Keywords:

Oryza sativa. Physiological quality. Vigor

Abstract

The objective of this study was to evaluate the efficiency of a pH test of the exudate (with and without tegument) as an indicator of the physiological quality of rice seeds. The experimental design was completely randomized, with seven lots and four replications. The seven lots were assessed for water content and initial physiological quality by means of germination, first germination count, emergence, emergence speed index and tetrazolium tests. The pH test of the exudate was conducted with 100 seeds of each treatment, with tegument and without tegument. The seeds were individually soaked in 2.0 mL distilled water for different periods (20, 40, and 60 minutes) and three temperatures (20, 25, and 30 °C). The results were submitted to the Scott Knott test at 5% probability. The pH test of the exudate is a promising method to evaluate the physiological quality of rice seeds by detecting differences in vigor between marketable lots. This test should be conducted with rice seed without tegument, at 25 °C, with a soak time of 60 minutes.

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References

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