Abstract
AbstractMetabolites of indoleacetaldehyde (IAAld), indoleethnol (tryptophol, IAAoI), tryptamine (TNH2) and indoleacetamide (IAAm) were investigated using 2 systems; a baeterial (Pea stem homogenates containing the epiphytic bacteria) and a plant system (pea stem sections under sterile conditions). In both systems, indoleacetic acid (IAA), IAAol and indolecarboxylic acid (ICA) are produced from IAAld, and IAA and ICA are produced from IAAol (production of IAAld and ICAld not investigated). In the plant system TNH2 is converted to IAAld,IAA, IAAol and little ICA and ICAld. In the bacterial system TNH2 is converted to IAA, IAAol, the unknown substance Xb, and many ICA and ICAld. Xb is produced from IAAm, too. A nonacidie inhibitor extract from pea stems reduces the IAA gain from IAAld, IAAol and TNH2, and the IAAol and IAAld gain from TNH2; in the bacterial system it increases the IAAol gain from IAAld and the Xb gain from TNH2 and IAAm. Metabolic routes connecting Try, TNH2 and IAA are constructed for the plant tissue and for the epiphytic bacteria, respectively, including 4 sites of inhibitor action.
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