Treatments for germination in Saccharum ravennae (L.) Murray and Ziziphus lotus (L.) Lam.
Saccharum ravennae and Ziziphus lotus [Erianthus ravennae?] present a series of characteristics which make them potentially useful in the restoration, fixing and maintenance of riverbanks along torrential-type watercourses in the Mediterranean region, as they are well adapted to such environments. Caryopses of Saccharum ravennae (from the stream Tabernas) and seeds of Ziziphus lotus (from the banks of the river Carboneras) were macerated in hydrogen peroxide, gibberellins and thiourea and germinated on organic substrate, agar and vermiculite in alternating light and darkness or in total darkness. Most S. ravennae caryopses had high germination potential, pronounced heliophila and a slight increase in the germination percentage when agar was used as substrate. The tolerances of germination percentages of all the light/darkness treatments fell within the limits required by the ISTA (International Seed Testing Association) for seed certification. Z. lotus showed an increase in germination on vermiculite and a slight increase with thiourea treatment on vermiculite.