Abstract

GARCIA-QUINTANA, Yudel et al. Effect of three provenances on the quality of Ochroma pyramidale seedlings (Malvaceae) in plastic container nurseries. Madera bosques [online]. 2024, vol.30, n.3, e3032595.  Epub Apr 08, 2025. ISSN 2448-7597.  https://doi.org/10.21829/myb.2024.3032595.

The correct selection of seed sources constitutes a key tool for the success of reforestation programs. This study evaluated the effect of three provenances (Pastaza, Napo and Orellana) on seed morphology, germination parameters and morphofunctional characteristics of Ochroma pyramidale seedlings grown in a nursery. The edaphic environment of the seed trees of each origin, seed morphology, germination and morphophysiological attributes of plant quality were characterized. Significant differences (p ≤ 0.05) were found between geographical origins in terms of the physical and chemical properties of the soil (textural class, organic matter, pH, Ca2+, Mg2+, N, P, K+) and the morphological characters of the seeds (width, thickness, length/width ratio and surface area) were different. The germination parameters were variable, reporting a germination percentage of 71.7% for Orellana, 89.0% and 92.0% for Napo and Pastaza, respectively. The morphological and physiological quality attributes and indices of the plants were different between provenances. The plants grown in the nursery from the geographical origins of Napo and Pastaza were characterized by greater growth, biomass, lignification, photosynthetic parameters and better quality. The results allow us to affirm that the origin influences the morphology of the seeds, germination and quality of O. pyramidale plants. The existence of two groups was identified: on the one hand, the Pastaza and Napo provenances and, on the other, Orellana, which is useful information to define zones of germplasm movement with material better acclimated to plantation sites in the Ecuadorian Amazon.

Keywords : physiological attributes; morphological attributes; germination; geographic origin; reforestation; nurseries.

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