Seed germination and seedling morphology of Smilax polyantha (Smilacaceae)

Biota Neotropica

Aline Redondo Martins²  Norbert Pütz¹  Ana Dionisia Da Luz Coelho Novembre¹  Sônia Maria De Stefano Piedade¹  Beatriz Appezzato Da Glória¹ 

[1] ,Faculdade de Tecnologia de Capão BonitoCapão Bonito SP ,Brazil

关键词: anatomy;    development;    greenbrier;    rhizome;    rhizophores;    anatomia;    desenvolvimento;    salsaparrilha;    rizoma;    rizóforos;   

DOI  :  10.1590/S1676-06032011000200003

来源: SciELO

【 摘 要 】

Brazilians have been using the underground organs of Smilax species in alternative medicine since the 19th century because of their anti-rheumatic qualities. However, even nowadays, these species are explored only by extractivism. Studies on seed germination and development of these organs could be useful to preserve these plants. After germination, seedling development of Smilax polyantha was analyzed to understand underground stem formation. Furthermore, to analyze the ontogenesis of the underground system, seedlings aged from one to twelve months were sectioned. One of the most striking features of this species is the presence of two stem branching systems. The plumule gives rise to the first stem branching system with negative geotropism. Its first underground axillary bud sprouted into the other caulinar axis with positive geotropism. The horizontal growth and the subsequent thickening of this underground organ depended on the development of axillary buds from basal nodes of the previous branches. The cotyledonary bud did not play a role in the underground formation, as previously described in the literature for this genus, but the buds of the basal cataphylls built the second stem branching system. In this study we discuss the terminology and suggest calling this second stem branching system a rhizophore.

【 授权许可】

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