Germination and seedling emergence of four endangered oak species

Autores/as

  • Yureli García-De La Cruz Universidad Veracruzana. Centro de Investigaciones Tropicales. Xalapa, Veracruz, México.
  • Fabiola López-Barrera Instituto de Ecología, A. C. Red de Ecología Funcional. Xalapa, Veracruz, México.
  • José María Ramos-Prado Universidad Veracruzana. Centro de Ecoalfabetización y Diálogo de Saberes. Xalapa, Veracruz, México

DOI:

https://doi.org/10.21829/myb.2016.2221326

Palabras clave:

establecimiento temprano de plántulas, ambiente lumínico, Quercus, peso de semilla, bosque de niebla

Resumen

Germination and emergence of the endangered cloud forest oak species Quercus germana, Q. insignis, Q. sartorii and Q. xalapensis were observed under different light conditions (sun vs. shade) in a secondary forest fragment (SFF) and in a greenhouse (GRE). Seed weight variability was evaluated for each species and its relationship to germination and emergence determined. After 60 days, a total of 62.17% of the acorns had germinated and 37.79% had emerged in both experiments. Germination was highest in Q. sartorii (71.83% ± 2.09%), followed by Q. germana (66.33% ± 2.06%), Q. insignis (60.83% ± 2.34%) and Q. xalapensis (53.50% ± 2.32%). In the GRE, Q. insignis germination was higher under sun (62.00% ± 4.73%) than shade (48.00% ± 5.12%), whereas its emergence was the lowest (37.66% ± 3.46%) compared to other species in both light environments. In the SFF, germination and emergence only differed among species; Q. xalapensis germination was lowest (47.00% ± 3.11%) and Q. sartorii emergence was highest (58.66% ± 3.35%), compared to the other species. Acorn weight did not influence germination or emergence in any species. The implications of this study are discussed, along with recommended propagation techniques for growing oaks for forest restoration in disturbed areas.

Germinación y emergencia de plántulas de cuatro especies de encino amenazadas

La germinación y emergencia de encinos amenazados del bosque de niebla, Quercus germana, Q. insignis, Q. sartorii y Q. xalapensis fue evaluada bajo diferentes condiciones lumínicas (sol vs. sombra) en un fragmento de bosque secundario (SFF) y un invernadero (GRE). Para cada una de las especies, la variabilidad del peso de la semilla fue relacionada con la germinación y emergencia. Después de 60 días, en ambos experimentos, un total de 62.17% de las bellotas germinaron y 37.79% emergieron. La germinación fue mayor en Q. sartorii (71.83% ± 2.09%), seguido de Q. germana (66.33% ± 2.06%), Q. insignis (60.83% ± 2.34%) y Q. xalapensis (53.50% ± 2.32%). En el GRE, la germinación de Q. insignis fue mayor bajo el sol (62.00% ± 4.73%) que bajo la sombra (48.00% ± 5.12%), mientras que su emergencia fue la más baja (37.66% ± 3.46%) comparada con otras especies en ambos ambientes lumínicos. En el SFF, la germinación y emergencia solo fueron diferentes entre especies; Q. xalapensis registró la germinación más baja (47.00% ± 3.11%) y Q. sartorii la emergencia más alta (58.66% ± 3.35%) comparada con el resto de las especies. El peso de la bellota no influyó en la germinación y emergencia de las especies. Se discuten las implicaciones de este estudio, así como recomendaciones sobre técnicas de propagación para la producción de encinos para restaurar bosques en áreas perturbadas.

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2016-09-19

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García-De La Cruz, Y., López-Barrera, F., & Ramos-Prado, J. M. (2016). Germination and seedling emergence of four endangered oak species. Madera Y Bosques, 22(2), 77–87. https://doi.org/10.21829/myb.2016.2221326
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