Phenological aspects and physiological quality of seeds of Mimosa caesalpiniifolia Benth.

Producing forest species in regions with limiting water conditions is still a challenge to be overcome. Thus, it is necessary and urgent to develop research that measure the influence of water stress on the growth, development and propagation capacity of species. Given the above, the objective of this work was to determine the influence of rainfall pulses on reproductive phenophases, production and vigor of seeds of Mimosa caesalpiniifolia Benth. Biweekly flowering and fruiting phenophases were recorded in selected plants in the field, and later these observations were correlated with climatic data from the region. Already the evaluation of the physiological potential was carried out through a germination test in five lots of seeds harvested from the trees of the phenophases study. Generally, it was observed that the sabiá (M. caesalpiniifolia) produced seeds between the first half of April and the second half of June, and in the second half of August and the first half of September 2021. The reproductive phenology of the sabiá depends on the extension and frequency of rainfall pulses. The pulse extension was favorable to the physiological potential of the seeds as the germination ranged from 85 to 96%. Therefore, M. caesalpiniifolia has its phenology and productive potential influenced by precipitation pulses.