The rhizosphere is the zone of the soil surrounding the root. Compared to bulk soil, the rhizosphere is characterized by intense microbial activity and growth stimulated by biologically active chemicals released by the roots (Hiltner 1904, Lynch and Whipps, 1990). The process of releasing these compounds has been called rhizodeposition, which represents a significant loss of energy to plants (Marschner 1995). On average, in annual species, between 30 and 60% of net assimilated carbon is allocated to roots (Lynch and Whipps 1990, Marschner 1995). Of this carbon, approximately 5%-21% of the total portion can be released as root exudate into the rhizosphere environment (Badri 2009, Jones et. al. 2011, Badri et at. 2013a Badri et at. 2013b). The root tip has been shown to be the predominant site of exudation and secretion in young, healthy plants that is clearly separated from older tissues in terms of metabolic signatures (Bowen 1979). Root exudates play an important role in enhancing ecological relevance in the rhizosphere environment, especially soil-root contact, by influencing soil physical and chemical properties, mediating chemical signaling, and establishing both positive and negative root-root interactions. , root-insect and root-microbe interactions in the immediate vicinity of roots (Eilers et al., 2010; Shi et. al. 2011b). Furthermore, the exudation of these compounds increases nutrient uptake and improves the stabilization of soil aggregation (Nelson and Mele, 2007, Bais et. al. 2006, Repley et. al. 2008, Vogan et. al. 2011 ). Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay Therefore, the nature and relative abundance of these compounds, their performance and their regulation are a major field of interest in root biology research. However, a more complete view on the composition of metabolic diversity is being elucidated thanks to the recent advancement of metabolomics and the development of nondestructive sampling techniques (Bakker et. al. 2012, Chaparro 2013a, Nicole and Harro 2016). At the same time, genes and biosynthetic pathways also contribute to enriching knowledge of the root exudation process which could open prospects for practical application in agriculture and plant protection (Liu et. al. 2009, Ishimaru et. al. 2011) . The exudate components found in the literature, most of which are mainly low molecular weight (LMW) carbon compounds, composed mainly of carboxylic acids, amino acids, amides, sugars, phenolic compounds, phytosiderophores, flavonoids, as well as a series of secondary metabolites. much of the diversity of root exudates (Cesco et. al. 2010, 2012, Phillips et. al. 2012). Few studies have shown the proportional qualitative and quantitative contribution of different classes of compounds to total root exudation (Azaizeh et. al 1995). Typically, the concentration of organic acids in the roots is generally about 10–20 mM, which represents 1%–4% of the total dry matter, and the concentration of sugars is ca. 90 mM (Jones, 1998, Farrar et. al. 2003). Schneckenberger (2008) demonstrated that the concentration of organic compounds ranges from 0.1 to 10 mM to reflect carbon concentrations in natural soil solutions (Owen and Jones, 2001). However, concentrations of carbon compounds at LMW may increase in rooted soil (van Hees et. al. 2005). The release of organic material has been shown to include two mechanisms: passive efflux of organic anions or simply diffusion via apoplastic pathways via specific transporter proteins that depend on.