Conservation of Campomanesia adamantium (CAMB.) O. berg seeds in different packaging and at varied temperatures

Abstract

-This article aims at evaluating the effects of different packaging and varied storage temperatures on the germination potential of seeds of Campomanesia adamantium Camb. O. Berg. The seeds were packaged in glass, aluminum foil and plastic containers, or maintained inside intact fruits at 5, 10 and 15 ºC during 0, 7, 14 and 21 days. After these periods the seeds were sown in Germitest® germination paper and maintained in incubation chambers at 25 ºC under constant white light for 42 days. Seed moisture contents were evaluated both before and after storage, as well as germination percentages, germination speed index, root and aerial portion of seedlings lengths, and total dry weights. All possible combinations of packing materials, temperatures and storage times were tested, with four repetitions of 25 seeds for each treatment. C. adamantium seeds showed initial water contents of 31.5%. Glass and aluminum packaging were efficient at maintaining the water content of the seeds, and provided greater germination speed index than the other packaging materials. Germination percentages, seedlings lengths and dry weights did not vary among the different temperatures tested. C. adamantium seeds can be stored for up to 21 days at temperatures between 5 and 15 ºC without altering their physiological quality. In terms of cost-benefit efficiencies, these seeds can be stored without significant damage for 21 days while still inside the fruits at temperatures of 5, 10 or 15 ºC. Index terms: guavira; Brazilian savannah; native fruit; Myrtaceae; seed longevity. CONSERVAÇÃO DE SEMENTES DE Campomanesia adamantium (CAMB.) O. BERG EM DIFERENTES EMBALAGENS E TEMPERATURAS

Do desiccation and storage of Campomanesia adamantium (Cambess.) O. Berg (Myrtaceae) seeds affect the formation and survival of seedlings?

“…The seeds packaged in semi-permeable plastic packaging in laboratory temperature allowed the exchange of water vapor between the seeds with high water content and the external environment, changing the level of hydration of seeds. These changes in water levels associated with the storage time influenced negatively the survival of the shoot and primary roots, confirming the recalcitrant behavior due to the sensitivity to drying and storing (Melchior et al, 2006;Scalon et al, 2013;Dresch et al, 2012Dresch et al, , 2014.…”

Storage of <i>Campomanesia adamantium</i> (Cambess.) O. Berg Seeds: Influence of Water Content and Environmental Temperature

“…The seeds of many fruit and forest species are sensitive to desiccation [11], but work concerning the storage of seeds of the genus Campomanesia has yielded contradictory results [12]- [14]. C.adamantium (Cambess.)…”

Application of biofilms in the post-harvest conservation of pequi (Caryocar brasiliense Camb.)

“…The increase in acidity may be also attributed to the release of galacturonic acids from the cell wall that increase during fruit ripening by the action of enzymes pectin methyl esterase and polygalacturonase (Scalon et al, 2012). According to Reis et al (2006), during the respiration process, organic acids are generated and volatilize.…”