Produção in vitro e criopreservação de raízes de Cleome rosea Vahl (Capparaceae)

Abstract

Cleome rosea is an herbaceous species found in the restinga vegetation of Brazil. Recent studies have reported its medicinal potential for important pharmacological properties, such as anti-inflammatory, antigenotoxic, antiviral and antibacterial activities. However, in recent years, no C. rosea plants have been found in their natural habitat, mainly due to human impact. Thus, it becomes applicable to the development of conservation methods that facilitate the study and exploration of the medicinal properties of C. rosea. The in vitro roots culture represents an efficient way to produce biomass, due to rapid growth, stable production of metabolites and represent a potential source of explants for mass propagation of different species. This study aimed to produce in vitro root cultures of C. rosea, associated with cryopreservation, as form of long-term maintenance of cultures, monitored by analysis of genetic stability. Cultures established from root explants of in vitro propagated plants of C. rosea showed excellent ability to multiplication of roots in culture medium supplemented with NAA plant regulator, maintaining this capacity during successive subcultures. Associated with these results, the establishment of protocols for cryopreservation by vitrification method resulted in high values of recovery frequency of the material after freezing in liquid nitrogen with vitrification solutions PVS2 and PVS3. Studies to monitoring the genetic stability by RAPD technique revealed the presence of significant polymorphisms in one of three cultures initiated from cryopreserved roots of C. rosea. These results demonstrate the potential production of roots of Cleome rosea and long-term conservation through cryopreservation, starting unpublished studies for the species.