Abstract
Long-term effects of chemical applications in agroecosystems have brought about the rise in awareness with greater emphasis on sustainable development and eco-friendly agriculture. This has opened up the advancement and increased utilization of biofertilizers as key components acting as nutrient suppliers and lower agricultural burden that lead to sustainable agriculture and conservation of the environment. Predominant biofertilizers are plant growth-promoting rhizobacteria (PGPR) with plant growth-promoting functional traits. Bacteria containing ACC deaminase are well-known to provide plant stress tolerance by reducing the ethylene level in stress-elicited plant; on the other hand, the physiological responses and mechanism of improved plant stress resistance by bacteria are poorly understood. As a part of plant defence against biotic and abiotic stresses, plants release a range of volatile organic compounds (VOC). Though VOC emission is a part of plant defence, it has a large impact to the environment and climate change. The higher atmospheric reactivity of VOC leads to generation of ozone, secondary aerosol formation and cloud formation. However, the emission of VOCs from different plant species is well studied in this respect, but the control of VOC emission from plants is a complex and open question. This chapter aims to focus on the function of the ACC deaminase-containing bacteria in controlling VOC emission along with other plant growth-promoting characteristics.
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