Abstract
Zephyranthes sylvatica is a beautiful lily, endemic from the Brazilian Caatinga. Although it has a great ornamental potential, little is known about this species, especially regarding its seeds germination process. Aiming to characterize the germination of Z. sylvatica seeds, we studied its imbibition curve, optimum temperature and substrate for germination and seedling emergence, osmotic and salt stress tolerance, as well as the tolerance to frosting/ defrosting, which indicates long term cryostorage potential. The germination of Z. sylvatica presents a triphasic model of imbibition, in which the primary root protrusion occurs after 72 hours of imbibition. The ideal conditions for evaluating seed germination of Z. sylvatica is 25 ºC, in paper rolls. These seeds are highly tolerant to osmotic stress, but not to salt stress. Z. sylvatica seeds can be cryopreservated without loss of germination and seed vigor.
Highlights
The Caatinga is the predominant biome in semi-arid climate northeastern Brazil, and it has a great diversity of plant species
There are several trees, shrubs and herbs of great beauty in Caatinga, among these, the caatinga-lily [Zephyranthes sylvatica (Mart.) Baker (Amarilidacea)], which is an endemic species of this savanna, with a great ornamental potential due to its beautiful flowers
The germination of Z. sylvatica shows triphasic model of imbibition, in which the primary root protrusion occurs after 72 hours of imbibition
Summary
The Caatinga is the predominant biome in semi-arid climate northeastern Brazil, and it has a great diversity of plant species These species have several potentialities that need to be studied. There are several trees, shrubs and herbs of great beauty in Caatinga, among these, the caatinga-lily [Zephyranthes sylvatica (Mart.) Baker (Amarilidacea)], which is an endemic species of this savanna, with a great ornamental potential due to its beautiful flowers. It is an herbaceous plant which has good resistance to the natural conditions of the Caatinga, occurring in areas of sandy soil under high temperatures most of the year and irregular rainfall. It is during the short rainy season that its flowers stand out in the landscape, revealing their full potential (Kiill and Santos, 2013)
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