Morfologia de plântulas e plantas jovens de 30 espécies arbóreas de Leguminosae

Abstract

Seedlings and saplings of tree species of Leguminosae from São Paulo State, Brazil, were studied morphologicalIy. This study was also carried out due to the scarce information about seedlings and saplings besides the importance of these data as a support for taxonomic, phylogenetic and ecological studies. The seedling and sapling development were observed daily in a germinator and greenhouse. Seedling morphology, cataphyII number, first eophyII differentiation time and their phyIIotaxis, cotyledon abscision time, first metaphyII differentiation and radicular nodulation data are presented. The results showed the greatest seedling variation in Leguminosae. In this famiIy, epigeal-foliaceous and epigeal-fleshy seedlings occurred in 80% of the studied species. In Caesalpinioideae, ali seedlings were epigeal, 20% of these seedlings had fleshy cotyledons. In Mimosoideae, 66.7% of the species had epigeal-foliaceous seedlings, 22.2% epigeal-fleshy and 11.1 % semi-hypogeal seedlings. Faboideae species exhibited two types of seedlings: 54.5% were epigeal-fleshy and 45.5% were hypogeal.