Seed germination of Magnolia pugana (Magnoliaceae), an endemic and endangered species from Western Mexico

  • César Jacobo-Pereira Universidad de Guadalajara
  • Rosa Romo-Campos Universidad de Guadalajara
  • Joel Flores Instituto Potosino de Investigación Científica y Tegnológica
Keywords: germinative treatments, Magnoliaceae, seed dormancy

Abstract

Magnolia pugana (H. H. Iltis & A. Vázquez) A. Vázquez & Carvajal is an endemic and endangered species located in western Mexico, which is distributed in gallery forests in the canyons of southern Zacatecas and north-central Jalisco. The aim of this study was to determine the seed viability and to identify the treatments to break seed dormancy in M. pugana. Seeds were collected from four locations, three of them located in Jalisco (Centro Universitario de Ciencias Biológicas y Agropecuarias, San Lorenzo and San Nicolas), and one in Zacatecas (Palo Verde). The following germinative treatments were applied: (i) manual aril removal, (ii) aril removal by leaching, soaking in gibberellic acid at different concentrations: (iii) 100 mg L-1, (iv) 200 mg L-1, (v) 300 mg L-1 and (vi) control. 100 seeds were used per treatment with five replicates each. The treatment with the highest germination percentage for all four sites was the manual aril removal with 52%, whereas the treatment with the lowest germination was control with 3.5%. By location San Lorenzo had the highest germination percentage at 16.5%, while San Nicolas had the lowest percentage.at 5.33% Germination treatments failed to break dormancy (germination rates <70%). The seeds of the four locations imbibed water so no physical seed dormancy occurs. Seeds with higher biomass did absorb less water.

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Author Biographies

César Jacobo-Pereira, Universidad de Guadalajara
Departamento de Ciencias Ambientales
Rosa Romo-Campos, Universidad de Guadalajara

Departamento de Ciencias Ambientales

Profesor-Investigador titular B

Joel Flores, Instituto Potosino de Investigación Científica y Tegnológica

Departamento de Ciencias Ambientales

Profesor-Investigador Titular B

Seed germination of Magnolia pugana (Magnoliaceae), an endemic and endangered species from Western Mexico
Published
2016-09-08
How to Cite
Jacobo-Pereira, C., Romo-Campos, R., & Flores, J. (2016). Seed germination of Magnolia pugana (Magnoliaceae), an endemic and endangered species from Western Mexico. Botanical Sciences, 94(3), 575-584. https://doi.org/10.17129/botsci.512
Section
PHYSIOLOGY / FISIOLOGÍA