Bio-technique
Through this bio-technique, plant health is assured as they work against pathogenic bacteria and fungi as biocide. Moreover, bacterial VOCs promote plant growth by using acetoin, a chemical compound that induces systemic resistance with plant gene expression (Bennett et al. 2012). However, response to plant-based flavonoids and strigolactones is recognised as host plant symbiosis and signalling molecules (Venturi and Keel, 2016). However unlike Myc factors produced by a particular mycorrhizal fungus, Nod factors by nodulation rhizobia and VOC are secondary cell signalling compounds found in root exudates that help specific rhizobial interactions with their host plant (Oldroyd, 2013).