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
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.