Indole Auxins

Gas Chromatographic Analysis of Acidic Indole Auxins in Nicotiana

“…The synthesis of IAA from tryptophan is coInsidered possibly to follow 2 different routes (10,12) which include such intermiediates as ICA anld IPA together with several neutral indole comipounds. The pathway of IAA synthesis in Nicotiana seems to follow the same proposed reaction chains.…”

Metabolism of Indoleacetic Acid in Rust Diseases. II. Metabolites of Carboxyl-labeled Indoleacetic Acid in Tissues

“…Another reason for employing short feeding times was to minimize microbial contamination. The addition of antibiotics (9, 28) In addition to accelerator a, compound A corresponds to growth-promoting substances found in other tissues (12,17,20,24 The accumulation of these materials in healthy tissue can be explained on the basis that their formation and transfer to decarboxylation sites is not the ratelimiting step in decarboxylation. If this assumption is proven correct, the different rates of formation in healthy and diseased tissue may be explained readily by the pronounced differences previously observed in carbohydrate and organic acid metabolism (7,8).…”

Ether-Soluble & Ether-Insoluble Auxins from Immature Corn Kernels

“…Free auxins are regarded as auxins (2,6,8,12) actually present in a sample of Col(d Ethanol Extraction. The kernels wx-ere separated froml the stalk, frozen wvith dry ice, homogenized with dry ice chilled absolute ethanol (10 11l ethanol/g fr wt kernels), and extracted overnight at -10°in the clark.…”

“…The etherinsoluble auxins are usually ignored, although etherinsoluble auxins that liberate IAA and IAN3 on alkaline hydrolysis have been described (1). Ascorbigen, a derivative of ascorbic acid and IAA, which y-ields IAA on alkaline hydrolysis, has been reporte(d to occur naturally in Brassicae and other plants (6). Wightman (24) has recently reported that a compound resembling ascorbigeil was formed in the metabolism of tryptophaile by the cabbage plant.…”