The cold storage prolongs the viability of feijoa seeds/O armazenamento refrigerado prolonga a viabilidade de sementes de goiabeira-serrana

This study aimed to evaluate the viability and seeds vigour of two genotypes of Acca sellowiana under different conditions and storage time. The seeds were obtained from two plants (G1 and G2) located in the backyards of the urban area of Vacaria city from the state of Rio Grande do Sul. The experim...

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Published inRevista Brasileira de fruticultura Vol. 37; no. 3; p. 748
Main Authors Donazzolo, Joel, Ornellas, Thiago Sanches, Bizzocchi, Leon, Vilperte, Vinicius, Nodari, Rubens Onofre
Format Journal Article
LanguagePortuguese
Published Sociedade Brasileira de Fruticultura 01.09.2015
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Summary:This study aimed to evaluate the viability and seeds vigour of two genotypes of Acca sellowiana under different conditions and storage time. The seeds were obtained from two plants (G1 and G2) located in the backyards of the urban area of Vacaria city from the state of Rio Grande do Sul. The experiment was conducted in trifatorial design (2 x 3 x 2), two storage conditions (room temperature: 20-25[degrees] C; and cool: 4-8[degrees] C), three storage periods (zero, one and two years), and two genotypes (G1 and G2) arranged in randomized complete blocks design with four replications of 50 seeds in each plot. The seeds were germinated over dampened paper towel in gerbox and kept in "fitotron" with a temperature of 25 [+ or -] 2[degrees] C and a photoperiod of 16h. It was assessed the germination speed index, percentage of germination and mean germination time, through counting of germinated seeds every two days during 44 days after onset of germination. The genotypes had significantly different performances in germination rate and vigour of the seeds. When stored in environment temperature the seeds lost the germinal vigour dramatically in the first year and completely in the second year. It is concluded that it is possible to maintain 80% of germination of Acca sellowiana seeds for two years in cold storage (4 to 8[degrees] C). Index terms: Pineapple-guava, Acca sellowiana, seed conservation, germination test, seedling vigour. Este trabalho teve como objetivo avaliar a viabilidade e o vigor das sementes de dois genotipos de Acca sellowiana sob diferentes condicoes e tempos de armazenamento. As sementes foram obtidas a partir de duas plantas (G1 e G2) localizadas em quintais da area urbana de Vacaria-RS. O experimento foi realizado em esquema trifatorial (2 x 3 x 2), sendo duas condicoes de armazenamento (temperatura ambiente: 20-25[degrees]C; e refrigerado: 4-8[degrees]C), tres periodos de armazenamento (zero, um e dois anos), e dois genotipos (G1 e G2), conduzidos em blocos casualizados, com quatro repeticoes de 50 sementes. As sementes foram postas para germinar sobre papel absorvente umedecido em caixas tipo "gerbox", mantidas em camara de crescimento com temperatura de 25 [+ or -] 2[degrees]C e fotoperiodo de 16 h. Avaliaram-se o indice de velocidade de germinacao, a porcentagem de germinacao e o tempo medio de germinacao, por meio da contagem de sementes germinadas a cada dois dias, por 44 dias apos o inicio da germinacao. Os genotipos apresentaram desempenhos significativamente diferentes na taxa germinativa e no vigor das sementes. Quando armazenadas em temperatura ambiente, as sementes perderam o poder germinativo drasticamente no primeiro ano e completamente no segundo ano. Conclui-se que e possivel manter 80% de poder germinativo das sementes de Acca sellowiana por dois anos em armazenamento refrigerado (4 a 8[degrees]C). Termos para indexacao: Feijoa, Acca sellowiana, conservacao de sementes, teste de germinacao, vigor de plantulas.
ISSN:0100-2945
DOI:10.1590/0100-2945-179/14