Effect of thermal shock and ruminal incubation on seed germination in Helianthemum apenninum (L.) Mill. (Cistaceae).
DOI:
https://doi.org/10.24310/abm.v27i0.7307Abstract
ABSTRACT. Effect of thermal shock and ruminal incubation on seed germination in Helianthemum apenninum (L.) Mill. (Cistaceae). Here, we analyse the effect of different treatments on seed germination in Helianthemum apenninum (L.) Mill. (Cistaceae), considering scarification with sandpaper, thermal shock simulating the heat from fire, and incubation in the rumen of sheep and goat simulating passage through the gut of ruminants. Mechanical scarification boosted the germination (95% vs. 6% of control treatment), indicating that the seeds have a potentially high germination rate if the coat is eroded. Thermal shock did not improve germination. Incubation in rumen increased seed germination, up to a 32% after 48h in ruminal liquid versus 12% for control seeds in the case of sheep. The results suggest that germination in H. apenninum, while not enhanced by heat from fires, may be enhanced by herbivore ingestion.
Key words. Dormancy, Mediterranean shrublands, ruminal digestion, thermal shock.
RESUMEN. Efecto del choque térmico y de la incubación ruminal en la germinación de semillas de Heliantemum apenninum (L.) Mill. (Cistaceae). En este trabajo se analiza el efecto que tienen diversos tratamientos sobre la germinación de las semillas de Helianthemum apenninum (L.) Mill. (Cistaceae), siendo éstos 1) la escarificación mecánica mediante abrasión con papel de lija, 2) choque térmico (que simula el efecto del fuego), y 3) incubación en el rumen de oveja y cabra (que simula el paso por el tracto digestivo del ganado). La escarificación mecánica aumentó considerablemente la germinación (95% vs 6% en el control), indicando una alta viabilidad de las semillas. El choque térmico no incrementó la germinación en ninguna de las combinaciones de tiempo y temperatura probadas. La incubación en el rumen incrementó el porcentaje de germinación, siendo 32% tras 48h de incubación frente a 12% para el control en el caso de oveja. Los resultados sugieren que el calor producido durante un fuego no promueve la germinación de las semillas de H. apennin ton, mientras que podría ser promovida por la ingestión de semillas por herbívoros.
Palabras clave. Arbustos mediterráneos, choque térmico, dormancia, digestión ruminal.
Downloads
Metrics
Downloads
Published
How to Cite
Issue
Section
License
Those authors who publish in this journal accept the following terms:
a. The authors will retain their copyrights and guarantee the journal the right of first publication of their work, which will be simultaneously subject to the Creative Commons Attribution-Non-commercial 4.0 license whose full text can be found at <http: // creative commons .org / licenses / by-nc / 4.0> that allows third parties to share the work as long as its author and its first publication are indicated, and as long as it is not for commercial purposes.
b. Authors may adopt other non-exclusive licensing agreements for the distribution of the version of the published paper (e.g., deposit it in an institutional telematic file or publish it in a monographic volume) provided that the initial publication in this journal be indicated.
c. Authors are allowed and recommended to disseminate their work through the Internet (e.g., in institutional telematic archives or on their websites) before and during the submission process, which can produce interesting exchanges and increase citations of the published work. (See The effect of open access)
1.png)
