title: Effect of storage in overcoming seed dormancy of Annona coriacea Mart. seeds.
abstract: The aim of this study was to evaluate the effect of pre-treatments on overcoming dormancy of A. coriacea seeds. Seeds were processed and stored in polyethylene bags at temperatures of at -18°C (42% RH), 5°C (34% RH), 15°C (60% RH) and 25°C (34% RH), during 0, 30, 60, 90, 120 and 150 days. After storage, seeds were immersed in 350 mg.L-1 gibberellic acid for 144 hours. Sowing was carried out in plastic bags containing Red Latosol + Bioplant®. Moisture content, emergence percentage, emergence speed index, length and dry mass of seedlings, were evaluated. The experimental design was completely randomized in a factorial with four replications of 50 seeds each. The seed storage at 5°C and subsequent immersion in gibberellic acid was efficient to reach high percentage, emergence speed and plant growth. A. coriacea seeds showed non-deep simple morphophysiological dormancy wherein the physiological component can be overcome after the seeds are storage at 5°C for a maximum period of 53 days and subsequent immersed in exogenous GA (350 mg.L-1 for 144 hours).
authors.affiliation: Pós-Doutoranda em Agronomia, Universidade Federal da Grande Dourados, (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil.
authors.forename: Daiane M
authors.initials: DM
authors.lastname: Dresch
authors.affiliation: Universidade Federal da Grande Dourados, (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil.
authors.forename: Silvana P Q
authors.initials: SP
authors.lastname: Scalon
authors.affiliation: Universidade Federal da Grande Dourados, (UFGD), Faculdade de Ciências Agrárias, Dourados, MS, Brasil.
authors.forename: Tathiana E
authors.initials: TE
authors.lastname: Masetto
mesh_terms: D031041:Annona / Q000145:classification / Q000502:physiology*; D005875:Gibberellins; D057445:Plant Dormancy / Q000502:physiology*; D010937:Plant Growth Regulators / Q000494:pharmacology; D036226:Seedlings / Q000187:drug effects / Q000254:growth & development*; D012639:Seeds / Q000187:drug effects / Q000254:growth & development*; D013696:Temperature; D013997:Time Factors
chemical_list: D005875:Gibberellins; D010937:Plant Growth Regulators; C007842:gibberellic acid