Klebsiella, Rhodococcus

Heavy metals, radionuclides

Deinococcus, Geobacter, Shewanella

aPGPRB, plant-growth-promoting bacteria.

aPGPRB, plant-growth-promoting bacteria.

bacilli (e.g., Bacillus subtilis, B. cereus, B. circulans), and others (e.g., Azospirillum, Serratia, Flavobacterium, Alcaligenes, Klebsiella, Enterobacter). Many of these bacteria produce the growth regulators auxins, cytokinins, gibberellins, or ethylene or abscisic acid, which stimulates plant growth (Arshad and Frankenberger, 1998). Azospirillum inoculation increases the density and length of root hairs as well as the elongation of lateral roots, increasing root surface area. The increased root area results in greater niche areas promoting greater colonization of species.

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