Resumo

ZAMORA-NATERA, Juan Francisco  e  TERRAZAS, Teresa. Foliar and petiole anatomy of four species of Lupinus (Fabaceae). Rev. Mex. Biodiv. [online]. 2012, vol.83, n.3, pp.687-697. ISSN 2007-8706.  https://doi.org/10.7550/rmb.27264.

The aims of this study were to describe and compare the foliar and petiole anatomy of 4 species of Lupinus (L. aschenbornii S.Schauer, L. exaltatus Zucc., L. montanus Kunth, and L. reflexus Rose) distributed in an elevation gradient at Parque Nacional Nevado de Colima. Leaves were fixed in the field and prepared using the paraffin embedding technique. In addition, part of the blades was dehydrated to describe leaf surface through the scanning electron microscope. The 4 species shared a papillose epidermis with undulated anticlinal walls in different degrees, stomata anomocytic, simple unicellular trichomes, and bifacial mesophyll. Leaflets of L. montanus are glabrous on the abaxial surface, whereas cells with a striate cuticle at the base of the trichomes are a shared trait of L. montanus and L. reflexus. Differences found on blade and mesophyll thickness as well as the abundance of epicuticular waxes could be an environmental effect. The petiole of the 4 species differed in the number and distribution of vascular bundles, and could be useful to distinguish them if these results are confirm by studying a larger number of species of Lupinus.

Palavras-chave : Lupinus montanus; Lupinus reflexus; papillose cells; petiole vascular bundles; trichomes; cuticular striations; leaflets.