No abstract
‘Guabijuzeiro’ and ‘cerejeira da mata’ are plant species from the Myrtaceae family, with many difficulties in asexual multiplication. Thus, the aim of this study was to evaluate ‘cerejeira da mata’ (Eugenia involucrata DC.) tree and ‘guabijuzeiro’ [Myrcianthes pungens (Berg) Legrand] tree propagation by air layering, using different IBA concentrations (0, 1000 , 2000 and 3000 mg L-1) and materials to wrap the substrate (transparent plastic, black plastic and transparent plastic + aluminum foil). The experimental design for both experiments was a randomized blocks, in a 3 x 4 factorial (wrapping material x IBA concentration), with three repetitions of five air layering each. After 180 days, the percentage of rooting, length and number of roots were evaluated. Sixty days after rooting the percentage of survival plants were evaluated. The air layering technique was not efficient in the ‘guabijuzeiro’ propagation. This technique could be used in ‘cerejeira da mata’ plants without the IBA application and using transparent plastic, but with low performance.
O objetivo deste trabalho foi avaliar a qualidade fisiológica para germinação das sementes de guabijuzeiro durante 12 meses de armazenamento em condições de controladas e de ambiente natural. Os trabalhos foram realizado na Universidade Tecnológica Federal do Paraná-Câmpus Dois Vizinhos. Foram utilizadas sementes de frutos maduros de guabijuzeiro. No experimento 1, o delineamento experimental inteiramente casualizado, com 3 repetições e 50 sementes por parcela. As sementes foram secadas a 25ºC durante 0, 6, 12, 24, 48, 72, 96, 120, 144 e 168 horas. No experimento 2, o delineamento experimental foi de blocos ao acaso, com fatorial 2 x 12 (local de armazenamento x período de armazenamento), com 3 repetições e 50 sementes por parcela. As sementes foram armazenadas em dois ambientes, em temperatura ambiente e em temperatura controlada à 6°C. Os períodos de armazenamento corresponderam a 0, 30, 60, 90, 120, 150, 180, 210, 240, 270, 300 e 330 dias. Para ambos experimentos, após cada período de armazenamento, as sementes foram semeadas em caixas Tetrapak ® , utilizando areia como substrato e colocadas em casa de vegetação. Aos 100 dias após a semeadura, avaliou-se a emergência (%) e IVE. Manteve-se o teor de umidade das sementes de guabijuzeiro acima de 80%, conseguindo-se manter respostas de 80% de viabilidade. Em geral, visualiza-se as sementes de guabijuzeiro podem ser armazenadas por até 180 dias em condição de baixa temperatura e 60 dias em condição natural, sem que haja total perda de viabilidade e para que se obtenha resultados de emergência superiores a 50%.
The objective of this study was to evaluate the viability of ‘jabuticaree açu’ [Plinia cauliflora (DC.) Berg] seeds according to water loss and packaging conservation conditions. Two experiments were carried out at UTFPR - Dois Vizinhos Campus, Parana State, Brazil. For the first experiment, the seeds were submitted to the hydro conditioning process by soaking in water during 24 hours with subsequently storage in a BOD chamber at 25°C for 0, 12, 24, 36, 48, 60, 72, 84 and 96 hours. This experiment was conducted in a completely randomized design with four replications of 50 seeds each. For the second experiment the seeds were separated into three lots: PET® bottles with lids, kraft® paper bags at room temperature and in cold storage (6°C±1°C). Each lot was stored during 0, 5, 10, 15, 20, 25, 30, 60, 90, 120 and 150 days. The experiment was carried out in a completely randomized design, in a 3x11 factorial (storage location x storage period), with four repetitions of 50 seeds each. Plinia cauliflora seeds present storage capacity of 96 hours at room temperature without loss of germination capacity, when previous hydro conditioning was carried out. Storage using Pet® bottles at room temperature for up to 25 days allows seeds viability.
ResumoO objetivo do trabalho foi avaliar o efeito do hidrocondicionamento e de técnicas de atmosfera controlada e modificada na conservação da viabilidade de sementes armazenadas de cerejeira-do-mato (E. involucrata) por diferentes períodos. O experimento 1 foi instalado com delineamento experimental deblocos ao acaso, em fatorial 2 x 4 x 2 (pré-hidrocondicionamento x técnica de armazenamento x tempo de armazenamento), com 4 repetições, de 50 sementes por parcela. As sementes extraídas foram separadas em dois lotes, sendo um submetido ao pré-hidrocondicionamento em água destilada durante 24 horas e outro não. Sementes hidrocondicionadas ou não foram submetidas a quatro técnicas de armazenamento, sendo estes, embalamento a vácuo, revestimento com biofilme de fécula de mandioca (3% m/v), vácuo + biofilme de fécula de mandioca e sem tratamento (testemunha). Posteriormente, as sementes foram mantidas em câmara fria, em temperatura de 5ºC durante 5 e 30 dias. O experimento 2 foi instalado em delineamento inteiramente casualizado, em esquema fatorial 2 x 3 (ambiente x período de armazenamento), com quatro repetições de 50 sementes por parcela. Foram testadas duas condições de armazenamento, sendo estas de ambiente natural e controlado sob temperatura de 6° C, permanecendo as sementes nestas condições por 3 períodos (15, 30 e 45 dias).Para o armazenamento das sementes de cerejeira-da-mata deve-se utilizar técnicas a vácuo isolada ou com revestimento de biofilme. Ocorre perda de viabilidade das sementes quando o teor de água foi reduzido a 39,84% ou se mantidas em condição ambiente por mais de 30 dias. Palavras chave: Eugenia involucrata DC.; Myrtaceae; Propagação sexuada; Armazenamento. Hydropriming and modified atmosphere or controlled to conserve viability cerejada-mata seeds AbstractThe objective was to evaluate the effect of hydropriming and conservation techniques (vacuum and biofilm) of stored seeds of cereja-da-mata (E. involucrata) for different periods. Experiment 1 was installed with experimental design of randomized blocks in a factorial 2 x 4 x 2 (pre-storage x technique hydropriming x storage time), with four replications of 50 seeds each. The extracted seeds were separated into two batches, one being subjected to the pre-hydropriming in distilled water for 24 hours and the other not. Hidrocondicionadas seeds or have not undergone four storage techniques, which are, vacuum packaging, coating cassava starch biofilm (3% w/v), vacuum + starch biofilm cassava and untreated (control). Then the seeds were kept in cold storage, in 5°C temperature for 5 and 30 days. Experiment 2 was completely randomized in a factorial 2 x 3 (environment x storage period), with four replications of 50 seeds per plot. Two conditions have tested these natural environment and under controlled temperature 6°C, the remaining seeds under these conditions for 3 times (15, 30 and 45 days). For storage of cereja-da-mata seeds should be used techniques isolated vacuum or biofilm coating. There is loss of seed viability when the water conten...
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