Sharma et al. (2011a) analyzed the functional and taxonomic diversity of
rhizobacteria in Saccharum munja in abandoned mine, analyzing the variations in
plants’ growth-promoting traits of rhizobacteria in different seasons and the significance of rhizobacteria in the establishment of this plant species at the mine site.
Knowing that the functional diversity among the rhizobacteria may vary with the
specific requirements of the host plants during their different growth phases (vegetative and reproductive) under different seasons, these authors concluded that the
rhizosphere of S. munja contains functionally diverse bacteria dominated by Bacillus
spp. and Paenibacillus spp. Abundance of the most efficient PGPB during the
reproductive phase of the plant indicated the significance of analyzing seasonal
variation among the rhizobacteria and concluded that plant growth-promoting traits
analyzed in the isolated rhizobacteria and their potential to enhance seed germination
and seedling growth of S. munja in mine spoil suggest their significance in the
natural colonization of this plant species at abandoned mine site.
Another particular example is the Sharma et al. (2011b) study, where the authors
evaluated the efficiency of selected strains of plant growth-promoting Pseudomonas
that enhanced the productivity of soybean-wheat cropping system in central India,
by the analysis of soil enzyme activities, nutrient acquisition, soil nutrient status, and
productivity of soybean and wheat under field conditions in vertisols of central India,
employing suitable multivariate statistical tools (PCA and cluster analysis).
Finally, in this review, a particular case must be noted, considering that the term
functional diversity helps to understand the biological complexity through the wide
range of interactions that organisms show on communities and ecosystems as they
may interact. In addition, organisms may have attributes or characteristics that define
their role within the ecosystems. Ortega-Acosta (2015) analyzed the functional
diversity of isolated endophyte bacteria from Lemna gibba L. plants obtained from
three Xochimilco channel zones in the rainy and dry seasons. According to OrtegaAcosta et al. (2015), Xochimilco’s lake is located in the southern part of Mexico City
basin which is a lacustrine zone that comprises a network of channels that, along
with the chinampas, confirms a unique ecosystem which has served as a source of
aquatic resources, and the use of aquatic macrophytes to the removal of pollutants in
a natural way is recommended. There are studies related to the rhizosphere of aquatic
plants that are focused on the direct functional analysis and investigated plantmicrobe interactions at the full biological hierarchy. The author selected three
distinct areas in the Lake of Xochimilco, interconnected by a system of water
channels according to their land use and environmental conditions, namely,
(A) Urban zone (“U”, where domestic waters are discharged into the water channels), (B) Tourist zone (“T”, a located zone of markets and boat rides on trajineras in
water channels), and (C) Chinampera zone (“CH”, an agricultural zone adjacent to
the water channels). Plants of L. gibba were collected from each water channel zone
in two seasons (dry season (May, (MA)) and rainy season (August, (AG))), in each
selected channel, with the establishment of three sites along them, taken in each site
samples of L. gibba plants. In each zone and period of study, environmental factors
were recorded in situ: air and water temperature, dissolved oxygen, turbidity,
conductivity, pH, transparency, and depth. In addition, water samples were taken
10 Functional Diversity of Plant Endophytes and Their Role in Assisted. . .
243
rhizobacteria in Saccharum munja in abandoned mine, analyzing the variations in
plants’ growth-promoting traits of rhizobacteria in different seasons and the significance of rhizobacteria in the establishment of this plant species at the mine site.
Knowing that the functional diversity among the rhizobacteria may vary with the
specific requirements of the host plants during their different growth phases (vegetative and reproductive) under different seasons, these authors concluded that the
rhizosphere of S. munja contains functionally diverse bacteria dominated by Bacillus
spp. and Paenibacillus spp. Abundance of the most efficient PGPB during the
reproductive phase of the plant indicated the significance of analyzing seasonal
variation among the rhizobacteria and concluded that plant growth-promoting traits
analyzed in the isolated rhizobacteria and their potential to enhance seed germination
and seedling growth of S. munja in mine spoil suggest their significance in the
natural colonization of this plant species at abandoned mine site.
Another particular example is the Sharma et al. (2011b) study, where the authors
evaluated the efficiency of selected strains of plant growth-promoting Pseudomonas
that enhanced the productivity of soybean-wheat cropping system in central India,
by the analysis of soil enzyme activities, nutrient acquisition, soil nutrient status, and
productivity of soybean and wheat under field conditions in vertisols of central India,
employing suitable multivariate statistical tools (PCA and cluster analysis).
Finally, in this review, a particular case must be noted, considering that the term
functional diversity helps to understand the biological complexity through the wide
range of interactions that organisms show on communities and ecosystems as they
may interact. In addition, organisms may have attributes or characteristics that define
their role within the ecosystems. Ortega-Acosta (2015) analyzed the functional
diversity of isolated endophyte bacteria from Lemna gibba L. plants obtained from
three Xochimilco channel zones in the rainy and dry seasons. According to OrtegaAcosta et al. (2015), Xochimilco’s lake is located in the southern part of Mexico City
basin which is a lacustrine zone that comprises a network of channels that, along
with the chinampas, confirms a unique ecosystem which has served as a source of
aquatic resources, and the use of aquatic macrophytes to the removal of pollutants in
a natural way is recommended. There are studies related to the rhizosphere of aquatic
plants that are focused on the direct functional analysis and investigated plantmicrobe interactions at the full biological hierarchy. The author selected three
distinct areas in the Lake of Xochimilco, interconnected by a system of water
channels according to their land use and environmental conditions, namely,
(A) Urban zone (“U”, where domestic waters are discharged into the water channels), (B) Tourist zone (“T”, a located zone of markets and boat rides on trajineras in
water channels), and (C) Chinampera zone (“CH”, an agricultural zone adjacent to
the water channels). Plants of L. gibba were collected from each water channel zone
in two seasons (dry season (May, (MA)) and rainy season (August, (AG))), in each
selected channel, with the establishment of three sites along them, taken in each site
samples of L. gibba plants. In each zone and period of study, environmental factors
were recorded in situ: air and water temperature, dissolved oxygen, turbidity,
conductivity, pH, transparency, and depth. In addition, water samples were taken
10 Functional Diversity of Plant Endophytes and Their Role in Assisted. . .
243