Germination of two varieties of Ochroma pyramidale (Cav. Ex Lam.) urb. From the Lacandon Jungle, Chiapas [Germinación de dos variedades de Ochroma pyramidale (Cav. Ex Lam.) urb. De la Selva Lacandona, Chiapas] Article uri icon

abstract

  • Introduction: Ochroma pyramidale (Cav. ex Lam.) Urb. is a fast-growing native species of economic and ecological importance. It is currently the only species in the genus Ochroma. Objective: To determine the effect of seven pre-germination treatments applied on seeds of O. pyramidale in its typical variety and O. pyramidale var. bicolor (Rowlee) Brizicky in the Lacandon Jungle. Materials and methods: Seven germination treatments were evaluated: control, soaking in water at room temperature (Soaking 12h and Soaking 24h ), immersion in boiling water at 100 °C (Boiling 3s and Boiling 10s ) and immersion in boiling water and soaking in coconut water (Boiling 3s %2b Soaking 24h , and Boiling 10s %2b Soaking 24h ). Coconut water was used as a natural source of cytokinins. Results and discussion: Germination of O. pyramidale in its typical variety (62 to 69 %25) was statistically higher (P = 0.05) with treatments that included immersing the seeds in boiling water. In the case of O. pyramidale var. bicolor, the highest germination values were obtained by the Boiling 3s (64 %25) and Boiling 3s %2b Soaking 24h (59 %25) treatments. The O. pyramidale var. bicolor seeds were susceptible to the boiling water immersion time, since germination was statistically greater (P = 0.05) at 3 s than at 10 s. Conclusions: Treatments that included immersion in boiling water had a greater effect on germination. Coconut water had no significant effect on the variable; therefore, the use of synthetic cytokinins is suggested in order to control the phytohormone dosage and thus verify its effect on germination. © 2019 Universidad Autonoma Chapingo. All Rights Reserved.

publication date

  • 2019-01-01