Bacillus, Acinetobacter, Corneybacterium, Flavobacterium, Micrococcus, Mycobacterium, Nocardia, Pseudomonas, Vibrio, Rhodococcus, and Sphingomonas species (Gupta et al. 2001; Kim et al. 2007; Jayashree et al. 2012); these bacteria are
helpful to use in the bioremediation of polychlorinated biphenyls (PCBs) in river
sediments, dechlorination of the solvent trichloroethylene (TCE) and chloroform.
8.10 Advantages of Bioremediation
According to Vidali (2001), the advantages of bioremediation of the polluted soil are
as follows:
• It is a natural process so it is perceived by the public as an acceptable waste
treatment process for contaminated material such as soil.
• It conserves the natural properties of soil.
• It utilizes energy from sunlight for performing its activity.
• It helps in increasing microbial biomass in the rhizosphere.
• It is useful for the complete destruction of a wide variety of contaminants.
• The end products of treatment are usually harmless which are usually CO 2 , H 2 O,
and cell biomass.
• It is a low-cost application or less expensive than other technologies.
8.11 Limitations
Plant growth–promoting rhizobacteria play a significant role in bioremediation of
polluted soil program. The success of these programs solely depends upon the
activity of PGPR and those need optimum environmental conditions for their growth
and colonization. But recently, the climate change influences the environment; due
to this, the PGPR performance disturbs or gets changed (Compant et al. 2010).
Therefore, climate change may also affect the microbial population present in the
soil surface, subsurface, and plant-associated communities (Drigo et al. 2009).
Climate change affects all the metabolic process, i.e., crop or plant physiology and
metabolism are affected; for example, in plants the production of amino acid
(tryptophan) decrease, which also results in the decrease in the production of IAA,
which disturbs the vegetative growth and root proliferation of the plant (Kravchenko
et al. 2004). The high temperature may also hamper the growth of plant and
physiology together, they are likely to lead to changes in the configuration, abundance, or activity of plant-associated microbial communities. Consequently,
population of microorganisms known for their valuable effects on plant health or
growth might also be reduced, in terms of exhibiting their desirable properties and
colonization capacity under certain environmental conditions (Compant et al. 2010).
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M. K. Chitara et al.
helpful to use in the bioremediation of polychlorinated biphenyls (PCBs) in river
sediments, dechlorination of the solvent trichloroethylene (TCE) and chloroform.
8.10 Advantages of Bioremediation
According to Vidali (2001), the advantages of bioremediation of the polluted soil are
as follows:
• It is a natural process so it is perceived by the public as an acceptable waste
treatment process for contaminated material such as soil.
• It conserves the natural properties of soil.
• It utilizes energy from sunlight for performing its activity.
• It helps in increasing microbial biomass in the rhizosphere.
• It is useful for the complete destruction of a wide variety of contaminants.
• The end products of treatment are usually harmless which are usually CO 2 , H 2 O,
and cell biomass.
• It is a low-cost application or less expensive than other technologies.
8.11 Limitations
Plant growth–promoting rhizobacteria play a significant role in bioremediation of
polluted soil program. The success of these programs solely depends upon the
activity of PGPR and those need optimum environmental conditions for their growth
and colonization. But recently, the climate change influences the environment; due
to this, the PGPR performance disturbs or gets changed (Compant et al. 2010).
Therefore, climate change may also affect the microbial population present in the
soil surface, subsurface, and plant-associated communities (Drigo et al. 2009).
Climate change affects all the metabolic process, i.e., crop or plant physiology and
metabolism are affected; for example, in plants the production of amino acid
(tryptophan) decrease, which also results in the decrease in the production of IAA,
which disturbs the vegetative growth and root proliferation of the plant (Kravchenko
et al. 2004). The high temperature may also hamper the growth of plant and
physiology together, they are likely to lead to changes in the configuration, abundance, or activity of plant-associated microbial communities. Consequently,
population of microorganisms known for their valuable effects on plant health or
growth might also be reduced, in terms of exhibiting their desirable properties and
colonization capacity under certain environmental conditions (Compant et al. 2010).
220
M. K. Chitara et al.