CIIDIR-IPN Unidad Durango,
COFAA, Durango, Dgo, Mexico.
Marciano-Melchor acknowledge financial support from Secretar?a de Investigation y Posgrado del Instituto Politecnico Nacional (SIP-IPN), SNI-Mexico, and the programs EDI and
COFAA of IPN.
received grants from SIBE (
COFAA), EDI (IPN), and SNI-CONACYT.
SGE acknowledges EDI and
COFAA, IPN (Mexico), and ERG to PIP 5262/06-07 CONICET (Argentina) and Flora of Chile Project (University of Concepcion, Chile) both for support research.
The authors would like to thank the Instituto Politecnico Nacional (Secretaria Academica,
COFAA, SIP, and CIC), the CONACyT, and SNI for their economical support to develop this work.