Seed germination of Cyperus obtusatus (J. Presl C. Presl) Mattf. Kuk (Cyperaceae)

Roger H.S. Aureliano, Luan D. F. de A. Melo, João L. de A. Melo Junior, Lailson C. A. Gomes, Ana P. do N. Prata

Abstract: Research on seed germination and dormancy allows us to explain the life strategy of a species, its distribution and dissemination in different environments. The present work was carried out with the objective of evaluating the germination of Cyperus obtusatus seeds, aiming at a better understanding of the plant development conditions. For this, the seeds were submitted to imbibition in distilled water in the following periods: 0, 4, 8, 12, 16, 20 hours. They were sown in Gerbox’s, on substrate (germitest paper) moistened with distilled water and placed in Biochemical Oxygen Demand (B.O.D), under constant 30ºC and 16 hours of light. Seed germination was evaluated by means of the first germination count (PCG), germination speed index (IVG), germination (GER), dry mass (DM) and seedling length (COMP). The maximum or minimum point for quadratic equations was calculated from the derivative. C. obtusatus seeds did not show dormancy under the conditions of temperature, light and humidity provided in this experiment. The results treatment of 16 hours of imbibition indicate greater vigor of the seeds through the dry mass MS, IVG and PCG.

Keywords: physiological potential; seed physiology; weed

Date published: 2023-06-28