For example,
Abou-Shanab et al. (2003) reported that inoculation of
Sphingomonas macrogoltabidus, Microbacterium liquefaciens,
and Microbacterium arabinogalactanolyticum to Alyssum
murale plants appreciably increased Ni uptake by plants when
compared to the un-inoculated control on account of decline in
soil pH. Similarly, Carrillo-Castaneda et al. (2003) reported
the potential of plant growth promoting Pseudomonas fluorescens
Avm, R. leguminosarum CPMex46, Azospirillum lipoferum
UAP40 and UAP154 in protecting alfalfa Medicago sativa
seeds from the copper toxicity. This stimulatory effect was
attributed to expedite the iron translocation by bacteria from
roots to shoots in the seedlings.