Physical and chemical methods to breach seed dormancy of sugar apple
Abstract
Cultivation of sugar apple has increased in the Setentrional Amazon, but one of the problems for obtaining quality seedlings is related to overcoming dormancy of its seeds. The objective of the present study was to evaluate the efficiency of physical and chemical methods to break sugar apple seed dormancy. Ripe sugar apple fruit were collected from an orchard located in Boa Vista-RR, pulped and their seeds washed in running water and dried in the shade for 24 h. A completely randomized experimental design was used in a factorial 2 (0 and 1000 mg L–1 GA3 = gibberellic acid) × 4 immersion times (0, 6, 12 and 24 h) × 2 (with and without scarification) with 4 replications and 50 seeds per replication. The seeds were then sown in beds under greenhouse-type shade with 50% brightness in soil and sand mixture (3:1 v / v) subtrate. The following were evaluated 30 days after sowing: percentage of emergence (%) and shoot growth after seedling emergence, at four-day intervals. At fifty‑eight days after sowing, the shoot and root lengths, number of leaves, shoot and root dry matter were assessed. The highest sugar apple seedling emergence speed and growth rate were obtained when the seeds were subjected to the method of scarification and soaking in GA3 for 12-24 h. Scarification and soaking in water for 24 h resulted in greater economy, practicality and financial savings.
Downloads
References
Propagação por enxertia de atemoia 'Thompson' sobre espécies de Rollinia. Revista Brasileira de Fruticultura, v. 32, n. 1, 2010.
ANDRADE, L. A. D.; BRUNO, R. D. L. A.; OLIVEIRA, L. S. B. D.; SILVA, H. T. F. D. Aspectos biométricos de frutos e sementes, grau de umidade e superação de dormência de jatobá. Acta Scientiarum Agronomy, v. 32, n. 32, p. 293-299, 2010.
FERREIRA, M. D. G. R.; SANTOS, M. R. A. D.; SILVA, E. D. O.; GONÇALVES, E. P., ALVES, E. U.; BRUNO, R. D. L. A. Superação de dormência em sementes de biribá (Rollinia mucosa (Jacq.) Baill). Revista Brasileira de Sementes, v. 31, n. 4, p. 95-99, 2009.
LIMA-BRITO, A.; CAMPOS, V.; SANTANA, J.; DORNELES, A. Efeito do ácido giberélico (GA3) na emergência de plântulas de Annona crassiflora Mart., Annona squamosa L. e Annona muricata L. Magistra, v. 18, p. 27-33, 2006.
NAGASHIMA, G. T.; MIGLIORANZA, E.; MARUR,C. J.L. ; SEIJI, Y.; BARROS, A. S.R.; MARCHIOTTO, F. Qualidade fisiológica e armazenamento de sementes de algodão embebidas em solução de cloreto de Mepiquat. Ciência e Agrotecnologia, v. 34, n. 3, 2010.
OLIVEIRA, M.C.; FERREIRA, G.; GUIMARAES, V. F; DIAS, G.C.B. Germinação de sementes de Atemoia (Annona Cherimola Mill. x A. squamosa L.) cv 'Gefner' submetidas a tratamentos com ácido Giberélico (GA3) e ethephon. Revista Brasileira de Fruticultura, v. 32, n. 2, p. 544-554, 2010.
PRADO NETO, M.; DANTAS, A. C. V. L.; VIEIRA, E. L.; ALMEIDA, V. D. O. Germinação de sementes de jenipapeiro submetidas à pré-embebição em regulador e estimulante vegetal. Ciência e Agrotecnologia, v. 31, n. 3, p. 693-698, 2007.
SHIMIZU, E. S. C.; PINHEIRO, H. A.; COSTA, M. A.; SANTOS FILHO, B. G. D. Aspectos fisiológicos da germinação e da qualidade de plântulas de Schizolobium amazonicum em resposta à escarificação das sementes em lixa e água quente. Revista Árvore, v. 35, n. 4, p. 791-800, 2011.
SCALON, S.; LIMA, A.; SCALON FILHO, H.; VIEIRA, M. Germinação de sementes e crescimento inicial de mudas de Campomanesia adamantium Camb.: Efeito da lavagem, temperatura e de bioestimulantes. Revista Brasileira de Sementes, v. 31, n. 2, p. 96-103, 2009.
SOUSA, S.A.; DANTAS, A.C.V.L.; PELACANI, C. R.; VIEIRA, E.L.; LEDO, C.A.S. Superação da dormência em sementes de pinha. Revista Caatinga, Mossoró, v. 21, n. 4, p. 118-121, 2008.
TAIZ, L.; ZEIGER, E. Fisiologia vegetal. 4. ed. Porto Alegre: Artmed, 2009. 819p.
Authors retain copyright and grant the Journal the right to the first publication. Authors are encouraged to and may self-archive a created version of their article in their institutional repository, or as a book chapter, as long as acknowledgement is given to the original source of publication. As the Journal provides open access to its publications, articles may not be used for commercial purposes. The contents published are the sole and exclusive responsibility of their authors; however, the publishers can make textual adjustments, adaptation to publishing standards and adjustments of spelling and grammar, to maintain the standard patterns of the language and the journal. Failure to comply with this commitment will submit the offenders to sanctions and penalties under the Brazilian legislation (Law of Copyright Protection; nº 9,610; 19 February 1998).