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Research Journal of Seed Science
  Year: 2021 | Volume: 14 | Issue: 1 | Page No.: 19-26
DOI: 10.3923/rjss.2021.19.26
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Influence of Temperature and Potassium Nitrate (KNO3) on the Germination/Dormancy of Tridax procumbens Linn

Dyéssica Siochetta Gomes , Carla Maria Garlet de Pelegrin , Fabiano Cassol , Marlei Veiga dos Santos and Nessana Dartora

Background and Objective: Tridax procumbens is a weed with significant medicinal importance in Brazil. This study evaluated the effects of temperature and KNO3 on Tridax procumbens seed germination and dormancy. Materials and Methods: Two subsamples of 50 achenes were submitted to treatments using a factorial combination of temperature (25 and 30°C) and moistening the substrate with KNO3 solution (0% KNO3, 0.2% KNO3) in a completely randomized experimental design with five replications. Daily germination counts were made using the primary root protrusion and analyzing the accumulated germination percentage, germination speed and accumulated germination curve. Results: Germination percentage increased at the highest temperatures. In contrast, the use of KNO3 at the same temperature slightly decreased germination speed after 21 days of cultivation. The accumulated germination curve adjusted to the logistic model of all treatments showed an asynchrony in seed germination over time. Conclusion: Thus, temperature positively influenced the germination speed index at 21 days, while the presence of 0.2% KNO3 in the substrate influenced it negatively.
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How to cite this article:

Dyéssica Siochetta Gomes, Carla Maria Garlet de Pelegrin, Fabiano Cassol, Marlei Veiga dos Santos and Nessana Dartora, 2021. Influence of Temperature and Potassium Nitrate (KNO3) on the Germination/Dormancy of Tridax procumbens Linn. Research Journal of Seed Science, 14: 19-26.

DOI: 10.3923/rjss.2021.19.26






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