Qualidade fisiológica das sementes de feijão (Phaseolus vulgaris L) colhidas em diferentes períodos após a fecundação do óvulo
Palavras-chave:
maturidade fisiológica, vigor das sementes, capacidade germinativa, peso médio, período necessárioResumo
A study was carried out in Viçosa with the bean (Phaseolus vulgaris L.) variety 'Rico 23' to determine the physiological maturation, germination and vigor of seeds harvested in different periods after ovule fertilization.
Floral buds were tagged and their pods were harvested after ovule fertilization at 48 hour intervals during 60 days. Ovule fertilization was considered to take place during flower opening.
It was found that seed maturation takes place from 40 to 54 days after ovule fertilization. During this period the seeds have 30 to 40% moisture content.
When tested immediately after the harvest, the seeds showed some germination 20 days after ovule fertilization,and reached a maximum after 38 days. Previously dried seeds showed germination 30 days after fertilization, attaining a maximum after 34 days.
Thirty days after ovule fertilization the seeds exhibited some vigor, reaching the maximum after 38 days. Considerable vigor loss started 50 days after fertilization.
The results showed that the periods of physiological maturation, maximum vigor and maximum germination are practically coincident in the testec bean variety.
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