Abstract
ABSTRACT Seeds of ‘sabiá’ (Mimosa caesalpiniifolia Benth.) have coat dormancy, which hampers the absorption of water and oxygen, thereby delaying germination. Thus, this study aimed to evaluate methods for overcoming dormancy associated with priming on germination and vigor of seeds of ‘sabiá’, considering the efficiency, practicality and cost of treatment. The experimental design was completely randomized, in a 4 x 5 factorial scheme (four methods for overcoming dormancy x five types of priming), constituting 20 treatments with four replicates of 25 seeds. The methods for overcoming dormancy used were tip removal, seed immersion in hot water at 100 °C for three minutes, immersion in sulfuric acid for 10 minutes and intact seeds. For the determination of physiological conditioning of seeds, the imbibition curve with the different priming agents was constructed. Priming was done on filter paper moistened with solutions of mannitol at the potentials of -0.2 MPa (16 hours), -0.4 MPa (24 hours) and -0.6 MPa (36 hours) and only with distilled water for the hydropriming (12 hours) and seeds without priming. The variables analyzed were first count of germination, germination, root length, shoot length and dry weight of seedlings. The data were subjected to analysis of variance by F test and Tukey test at 5% probability. The dormancy of M. caesalpiniifolia seeds should be overcome with the use of hot water (100 °C) for three minutes, without the need for priming.
Highlights
The multiplication of native species has been more valued in recent times, aiming mainly at the production of seedlings for the restoration of degraded areas and restoration of landscapes, due to a greater concern with the preservation of the environment and biodiversity.Among the potential native species for these activities, there is Mimosa caesalpiniifolia Benth., popularly known in Portuguese as ‘sabiá’, ‘unha-degato’ or ‘sansão-do-campo’, belonging to the Fabaceae family and of natural occurrence in the Northeast region (MAIA, 2012)
The multiplication of M. caesalpiniifolia is undermined by the fact that the seeds have coat dormancy (COSTA et al, 2018), which hampers the absorption of water and delays germination (SILVA et al, 2012)
This study aimed to evaluate methods to overcome dormancy and the effects of priming on the germination and vigor of M. caesalpiniifolia seeds, considering the efficiency, practicality and cost of treatment
Summary
Among the potential native species for these activities, there is Mimosa caesalpiniifolia Benth., popularly known in Portuguese as ‘sabiá’, ‘unha-degato’ or ‘sansão-do-campo’, belonging to the Fabaceae family and of natural occurrence in the Northeast region (MAIA, 2012) This species has ornamental characteristics, and its wood is used in external environments in the form of stakes, hedges and in the production of firewood and charcoal. The multiplication of M. caesalpiniifolia is undermined by the fact that the seeds have coat dormancy (COSTA et al, 2018), which hampers the absorption of water and delays germination (SILVA et al, 2012) When it comes to break coat dormancy, the most commonly used methods are: mechanical scarification (tip removal or abrasion with sandpaper), chemical scarification (sulfuric acid and hydrochloric acid) or physical scarification (immersion in hot water) (MONTANHA et al, 2018). At the time of the choice of the best method, one should consider the financial cost, risk to the operator, convenience and efficiency
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
