Germinación de dos variedades de Ochroma pyramidale (Cav. ex Lam.) Urb. de la Selva Lacandona, Chiapas
Germination of two varieties of Ochroma pyramidale (Cav. ex Lam.) Urb. fromthe Lacandon Jungle, Chiapas
Available online: 2018-10-29 / pages.85-94
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Introduction: Ochroma pyramidale (Cav. ex Lam.) Urb. is a fast-growing native species ofeconomic and ecological importance. It is currently the only species in the genus Ochroma.Keyworks: dormancy; imbibition; seed cover; cytokinins; coconut water
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 theLacandon Jungle.
Materials and methods: Seven germination treatments were evaluated: control, soaking in waterat room temperature (Soaking12h and Soaking24h), immersion in boiling water at 100 °C (Boiling3sand Boiling10s) and immersion in boiling water and soaking in coconut water (Boiling3s +Soaking24h, and Boiling10s + Soaking24h). Coconut water was used as a natural source ofcytokinins.
Results and discussion: Germination of O. pyramidale in its typical variety (62 to 69 %) wasstatistically 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 theBoiling3s (64 %) and Boiling3s + Soaking24h (59 %) treatments. The O. pyramidale var. bicolorseeds were susceptible to the boiling water immersion time, since germination was statisticallygreater (P = 0.05) at 3 s than at 10 s.
Conclusions: Treatments that included immersion in boiling water had a greater effect ongermination. Coconut water had no significant effect on the variable; therefore, the use ofsynthetic cytokinins is suggested in order to control the phytohormone dosage and thus verify itseffect on germination.
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Toledo-González, K. A., Levy-Tacher, S. I., Macario-Mendoza, P. A., & de Nova-Vázquez, J. A. (2019). Germination of two varieties of Ochroma pyramidale (Cav. ex Lam.) Urb. fromthe Lacandon Jungle, Chiapas. Revista Chapingo Serie Ciencias Forestales y del Ambiente, XXV(1), 85-94. http://dx.doi.org/10.5154/r.rchscfa.2018.06.046