Biometria, crescimento inicial e avaliação da qualidade fisiológica em sementes de goiabeira-Serrana (Acca sellowiana O. Berg.)

Abstract

Brazilian Guava, a native fruit species from Southern Brazil, has become of great importance due to its comercial and ecological value. Despite its increasing importance there are few researches focusing seed technology. The research aims: a) evaluate biometric aspects of fruits and seeds as well as early growth of Brazilian Guava seedlings; b) evaluate physiological quality and the use of tetrazolium (TZ) test to analyse viability of seeds and; c) test the effect of osmoconditiong with polyethylene glycol (PEG 6000) in two levels (100g/L -1 and 200g/L 1 ) and four periods of imbibition (8; 16; 24 and 32h) upon physiological quality. It was observed six phases of early development of seedlings. The germination test was positively correlated with treatments 0,5 TZ 2h and 1 TZ 2h. For greenhouse emergency, there was positive correlation for the treatment 0,5 TZ 2h. The tetrazolium test allowed to rank the lots in four levels of viability. There was a remarkable effect of osmoconditioning with PEG 6000 in the physiological quality of Brazilian Guava seeds.