Biometria e germinação de sementes de Macrolobium acaciifolium (Benth.) Benth. de várzea e igapó da Amazônia Central

Abstract

RESUMO -Este estudo objetivou a análise morfométrica de sementes de Macrolobium acaciifolium oriundas de ambientes de várzea e igapó amazônicos, bem como o efeito dos substratos dessas áreas na germinação e formação de plântulas da espécie. Foi realizada a análise biométrica de 200 sementes de M. acaciifolium provenientes de populações de ambos ambientes da Amazônia Central. Em casa de vegetação foi analisada a germinação das sementes sob seu solo de origem e sob vermiculita. As sementes oriundas de igapó apresentaram maiores médias de peso e espessura em comparação com as sementes de várzea. A porcentagem de germinação das sementes dos dois ambientes foi semelhante, mas a velocidade foi superior para as sementes de igapó, independente do substrato. As sementes de igapó são maiores que as sementes de várzea e por possuírem mais reservas, são capazes de produzir plântulas mais vigorosas, independente das condições físicas do substrato. Palavras-chave: biomassa, florestas alagáveis, propagação de espécies florestaisABSTRACT -This study focuses on the morphometric analysis of seeds of Macrolobium acaciifolium from environments of Amazonian floodplains and igapó, as well as the effect of the substrates of these areas on the germination and seedling formation of the species. A biometric analysis of 200 M. acaciifolium seeds from populations of both Central Amazon environments was performed. In greenhouse, germination of seeds under their soil of origin and under vermiculite was analyzed. The seeds from igapó presented higher mean weight and thickness compared to the floodplain seeds, which, on occasion, presented higher averages of length and width. The seed germination percentage of both environments was similar, but the speed was higher for the igapó seeds, regardless of the substrate. The igapó seeds are larger than the floodplain seeds and, because they have more reserves, they are able to produce more vigorous seedlings, regardless the physical conditions of the substrate.

Determination of physical properties and viability in different colors of Pueraria seeds

“…In recent years, morphometric analysis (length, width and thickness, and fresh and dry mass) has been used to detect and interpret differences in the shape and size of seeds (SANTOS et al, 2015;PINHEIRO et al, 2017;ROSO et al, 2019;SANTOS et al, 2020), allowing a better understanding of the relationship between individuals and groups (CHRISTO et al, 2014). The effect of variability in seed size (dimensions) and genetic, physical, and physiological quality has been the subject of several studies with different approaches, considering different performance components in seeds and their resulting seedlings (PELLISSIER, 2013) as well as their mass.…”