Ruptura de la latencia física y germinación de semillas de Chiranthodendron pentadactylon (Malvaceae)

Rupture of physical dormancy and seed germination of Chiranthodendron pentadactylon (Malvaceae)

Maribel Apodaca-Martínez, Victor Manuel Cetina Alcalá, Jesús Jasso-Mata, Miguel Ángel López-López, Héctor González-Rosas, Ebandro Uscanga-Mortera, Antonio García-Esteva

Abstract


Backgraund: The low availability, low percentage of germination, pests, and juvenile period higher than 25 years, are the problems to propagate C. pentadactylon by seed.

Hypothesis: There is morphophysiological variation of the seeds between trees and the pregerminative treatments increase the percentage and speed of germination in seeds with six months of storage at room temperature.

Species studied: Chiranthodendron pentadactylon Larreat.

Study site and year of study: Postgrado en Ciencias Forestales, Campus Montecillo, Estado de  Mexico, Mex. June, 2016

Methods: The moisture content, the viability and the effect of pregerminative treatments on the percentage and speed of germination of the seeds were determined. A randomized block design was used. The random blocks included the treatments: 1 (mechanical scarification + cold stratification at 5 ° C for 5 days), 2 (mechanical scarification + imbibition for 12 h), 3 (mechanical scarification + cut at the base of the seed) and 4 (control). The treatments were randomized within each block.

Results: The moisture content was less than 10 % and the viability was 100 %. Significant differences between treatments were found for germination percent. The Tukey test (α = 0.05) showed differences between pregerminative treatments 1, 2 and 3 with respect to T4. Germination speed recorded the highest value in treatment 3.

Conclusions: With treatments 1, 2 or 3, more than 77 % germination was obtained. Treatment 3 showed greater germination speed, which is important for seedling production.


Keywords


Germination speed; macpalxochitl; scarification

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DOI: http://dx.doi.org/10.17129/botsci.2094

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Botanical Sciences is an international peer-reviewed journal that publishes scientific papers in plant sciences. The arguments, figures / schemes / photographs, quality and the general contents of this publication are full responsibility of the authors, and not commit the Editor- in-Chief or the Sociedad Botánica de México.

Botanical Sciences year 8, Vol. 97, No. 3, July-September 2019. Quarterly publication edited and published by Sociedad Botánica de México A.C. (www.socbot.mx). Editor in Chief Salvador Arias, Jardín Botánico, Instituto de Biología, 3er Circuito s/n, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510. Reserves of Rights to the Exclusive Use No. 04-2017-040716054100-203, digital-ISSN 2007-4476, both granted by the Instituto Nacional del Derecho de Autor. Responsible for updating the page Pedro López, email: plopez@escire.mx, eScire. Last update July 18, 2019.

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