Root exudates comprise primary and secondary plant metabolites that are exuded by roots. They oligomerize with microbial metabolites to form mucilage. Contact with soil particles then induces the formation of a slimy polymer called mucigel that covers roots. Different methods exist to recover root exudates from either soil-grown plants or hydroponic cultures. This low-molecular-weight fraction of analytes can be subjected to GC and LC analyses. The results provide a basis for asking specific

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... stions. Their nature depends on the focus of the research, either phenotyping characterization or metabolic diversity exploration.