Organic Compounds Released by Plant Roots

Sugars and Polysaccharides

Arabinose, desoxyribose, fructose, galactose, glucose, maltose, mannose, mucilages of various compositions, oligosaccharides, raffinose, rhamnose, ribose, sucrose, xylose.

Organic Compounds Released by Plant Roots

Amino Acids

α-alanine, β-alanine, α−amino adipic, γ-amino butyric, arginine, asparagine, aspartic, citrulline, cystathionine, cysteine, cystine, deoxymugineic, 3-epihydroxymugineic, glutamine, glutamic, glycine, homoserine, histidine, isoleucine, leucine, lysine, methionine, mugineic, ornithine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, valine.

Organic Acids

Acetic, aconitic, aldonic, ascorbic, benzoic, butyric, caffeic, citric, p-coumaric, erythonic, ferulic, formic, fumaric, glutaric, glycolic, glyoxilic, lactic, malic, malonic, oxalacetic, oxalic, p-hydroxy benzoic, piscidic, propionic, pyruvic, succinic, syringic, tartaric, tetronic, valeric, vanillic.

Fatty Acids

Linoleic, linolenic, oleic, palmitic, stearic.


Campesterol, cholesterol, sitosterol, stigmasterol

Growth Factors

p-amino benzoic acid, biotin, choline, n-methyl nicotinic acid, niacin, pantothenic, vitamins B1 (thiamine), B2(riboflavin), and B6(pyridoxine)


Amylase, invertase, peroxidase, phenolase, phosphatases, polygalacturonase, protease Flavonones and Nucleotides Adenine, flavonone, guanine, uridine or cytidine


Auxins, p-benzoquinone, scopoletin, hydrocyanic acid, 8-hydroxyquinoline, glucosides, hydroxamic acids, luteolin, unidentified ninhydrin-positive compounds, unidentified soluble proteins, reducing compounds, ethanol, glycinebetaine, inositol and myo-inositol-like compounds, Al-induced polypeptides, dihydroquinone, quercetin, quercitrin, sorgoleone

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