EFECTOS DE LA TEMPERATURA EN LA GERMINACIÓN DE SEMILLAS DE LAS ESPECIES Prosopis pallida (Humb. & Bonpl. ex Willd.) Kunth Y Prosopis juliflora (Sw.) DC.
EFECTOS DE LA TEMPERATURA EN LA GERMINACIÓN DE SEMILLAS
DOI:
https://doi.org/10.47230/unesum-ciencias.v5.n6.2021.559Keywords:
Seed viability, germination, response to fireAbstract
Prosopis pallida (Humb. & Bonpl. Ex Willd.) Kunth and Prosopis juliflora (Sw.) DC., are two of the tree species of greatest economic and ecological importance in the areas arid and semi-arid of the world. Prosopis species have attracted attention for their great ability to survive in very inhospitable environments. This work had the objective of evaluating the effects of temperature on the germination of the mentioned species as an indicator of their response to fire. We worked with 40 treatments resulting from the 2x5x4+1 trifactorial arrangement, (two species, five temperature values, four exposure times and one control), which were assigned to a completely randomized experimental design with three repetitions. The normality of the data was checked with the Shapiro-Wilks test. The comparison of the means was carried out with the Student's t test for viability and with an analysis of variance and the Tukey test for the difference between pairs of means for the germination percentage. We worked with a significance level of 0.05 (p=0.05). Statistical analysis was performed with the SPSS Statistics for Windows program (Version 22.0). The germination percentage of the seeds used was affected both by the increase in temperature and by the exposure time. However, they could germinate after the occurrence of low intensity fires that generate temperatures of up to 80 and 100 oC for P. pallida and P. juliflora, respectively.
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