TY - JOUR
T1 - Growth response and heavy metals tolerance of axonopus affinis, inoculated with plant growth-promoting rhizobacteria{Bhuvna}
AU - Cardón, Daniela Labra
AU - Villafán, Silvano Montes
AU - Tovar, Aída Rodríguez
AU - Jiménez, Sandra Pérez
AU - Zúñiga, L. Angélica Guerrero
AU - Amezcua Allieri, Myriam A.
AU - Pérez, Néstor O.
AU - Dorantes, Angélica Rodríguez
PY - 2010/12
Y1 - 2010/12
N2 - Different microorganisms have been used for bioremediation based on their resistance and ability to sequester heavy metals. The use of plant growth-promoting rhizobacteria (PGPR) for bioremediation of these contaminants has been successful. A PGPR isolated from hydrocarbons-contaminated soil identified as Bacillus sp., by microbiological and molecular tools and characterized as heavy metal tolerant by minimal inhibitory concentration (MIC) assay was inoculated into Axonopus affinis plants. Both of them were exposed to cadmium, nickel, and zinc and the effect of their relationship was analyzed by multivariate analysis. The results did not show a significant growth promotion and development of this Poaceae with rhizobacteria alone, but the presence of heavy metals plus the PGPR assured the survival of plants. This suggests that the plant's response is related with the metal concentration and the exposure time to the contaminants, as well as with its intrinsic tolerance. The Bacillus sp strain allowed the growth maintenance of A. affinis and enhanced its tolerance to the assayed heavy metals, suggesting a synergistic effect between this species and the rhizobacterium in response to contaminating agents.
AB - Different microorganisms have been used for bioremediation based on their resistance and ability to sequester heavy metals. The use of plant growth-promoting rhizobacteria (PGPR) for bioremediation of these contaminants has been successful. A PGPR isolated from hydrocarbons-contaminated soil identified as Bacillus sp., by microbiological and molecular tools and characterized as heavy metal tolerant by minimal inhibitory concentration (MIC) assay was inoculated into Axonopus affinis plants. Both of them were exposed to cadmium, nickel, and zinc and the effect of their relationship was analyzed by multivariate analysis. The results did not show a significant growth promotion and development of this Poaceae with rhizobacteria alone, but the presence of heavy metals plus the PGPR assured the survival of plants. This suggests that the plant's response is related with the metal concentration and the exposure time to the contaminants, as well as with its intrinsic tolerance. The Bacillus sp strain allowed the growth maintenance of A. affinis and enhanced its tolerance to the assayed heavy metals, suggesting a synergistic effect between this species and the rhizobacterium in response to contaminating agents.
KW - Bioremediation
KW - Heavy metals
KW - Microorganisms
KW - Plants
UR - http://www.scopus.com/inward/record.url?scp=78650559132&partnerID=8YFLogxK
M3 - Artículo
SN - 1684-5315
VL - 9
SP - 8772
EP - 8782
JO - African Journal of Biotechnology
JF - African Journal of Biotechnology
IS - 51
ER -