Abstract

PERISSE, P  and  TOURN, GM. Seed morphology, presence of areoles and water entry at imbibition of Vicia dasycarpa Ten. cv. Tolse F.C.A. Phyton (B. Aires) [online]. 2015, vol.84, n.1, pp.184-189. ISSN 1851-5657.

The morphological characteristics of the seeds of Vicia dasycarpa Ten. cv. Tolse FCA were studied in relation to the area of imbibition water entry and were considered the presence of areoles. Seeds were analyzed using a stereo, optical and scanning electron microscope (SEM). The determination of the initial water entry area was carried out by immersing the seeds in a solution of tetrazolium (1%). This study showed that this species has seeds with a halo framing the hilum, an inconspicuous dry aril and a deltoid micropyle. The seedcoat pattern is papillose. The tracheid bar is surrounded by a ring of parenchymatous cells, and the tracheids show slight warty and non-vestured pits. It was confirmed the presence of an endospermic radicle pocket that surrounds and protect the radical tip. Two pairs of cotyledonar areoles were identified. It was established that the entry of water during imbibition starts in the area of the lens -having cracks- and moves in the sagittal plane. Both citological characteristic of tracheid bar and areoles presence show an apomorfous state between the Papiplionoids.

Keywords : Vicia dasycarpa; Seed coat; Embryo; Areoles; Cracks.

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