Effect of seed age on germination, seedling survival and growth of Mimosa luisana (Leguminosae)
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ORIGINAL ARTICLE
Effect of seed age on germination, seedling survival and growth of Mimosa luisana (Leguminosae) Susana Adriana Montaño‑Arias1,2 · Hilda Araceli Zavaleta‑Mancera1 · Sara Lucía Camargo‑Ricalde2 · Rosaura Grether2 Received: 22 January 2020 / Accepted: 5 September 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Key message Mimosa luisana seeds germinate after 7 years of storage, suggesting that they have a long span life; an interesting characteristic for environmental restoration of semi-arid zones. Abstract Mimosa luisana is endemic to Mexico, provides ecosystem services and is economically and culturally important. This species exhibits morphological, anatomical and physiological qualities that make it potentially valuable in ecological restoration. This study evaluated the effects of seed age on seed germination, survival seedlings and growth of M. luisana, on the assumption that seed age positively influences the parameters related to germination. Mature fruits were collected at the semiarid Tehuacán–Cuicatlán Valley and the seeds were extracted. Healthy seeds were measured and weighed to obtain a uniform sample. Seed moisture content, imbibition rate, germination percentage, survival seedlings and growth were quantified. Seeds that were 84 months old showed the lowest moisture content (4.65%) and imbibition rate of unscarified seeds increased as seeds were older. Scarification considerably promoted germination, which was epigeal and phanerocotylar. Regardless of seed age, seedling growth was slow, with the presence of foliar cotyledons which persisted after the appearance of the protophylls, and the characteristics of an adult plant were observed until the day 22 after sowing. Mimosa luisana seeds are long-lived and the germination percentage depends on the age of the seed and whether or not it was scarified. Keywords Conservation · Germination · Mimosa · Restoration ecology · Scarification
Introduction In Mexico, there are ca. 105 species of Mimosa L. (Leguminosae), 54% of which are endemic; thus, it is considered the most diverse genus of the mimosoids in the country (Grether Communicated by Buckeridge. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00468-020-02031-5) contains supplementary material, which is available to authorized users. * Hilda Araceli Zavaleta‑Mancera [email protected] 1
Colegio de Postgraduados, Programa de Posgrado en Botánica y Unidad de Microscopía Electrónica, Km 36.5 Carretera México‑Texcoco, Montecillo, Texcoco, Estado de México C.P. 56230, México
Departamento de Biología, División de Ciencias Biológicas y de La Salud, Universidad Autónoma Metropolitana-Iztapalapa, Apdo. Postal 55‑535, Ciudad de México, México
2
et al. 2015). Mimosa luisana Brandegee is a species endemic to the semiarid Tehuacán–Cuicatlán Valley, which is located in the states of Puebla and Oaxaca, Mexico (Martínez-Bernal and Grether 2006). Mimosa luisana is considered a multipurpose species (Cam
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