Glucosides of coumarinic and o-coumaric acids in the tonka bean.
نویسندگان
چکیده
The beta-glucosides of coumarinic and o-coumaric acids were detected in extracts of cotyledons, exocarps, and seedling leaves of the tonka bean. The existence of these compounds and the presence of a beta-glucosidase having specificity for coumarinyl glucoside suggest that the tonka bean synthesizes coumarin by a pathway similar to the one found in sweetclover.
منابع مشابه
The Biosynthesis of Coumarin in Melilotus AZba
Previous investigations have shown that CY4-labeled transcinnamic acid is rapidly converted to o-coumaric acid P-glucoside by shoots of Melilotus alba (white sweet clover) (1) and Hierochlod odorata (sweet grass) (2). This glucoside is then converted to coumarin (l-3), possibly by way of trans-cis isomerization of the glucoside to coumarinic acid P-glucoside. The small amount of radioactivity f...
متن کاملThe biosynthesis of coumarin in Melilotus alba.
Previous investigations have shown that CY4-labeled transcinnamic acid is rapidly converted to o-coumaric acid P-glucoside by shoots of Melilotus alba (white sweet clover) (1) and Hierochlod odorata (sweet grass) (2). This glucoside is then converted to coumarin (l-3), possibly by way of trans-cis isomerization of the glucoside to coumarinic acid P-glucoside. The small amount of radioactivity f...
متن کامل4-O-ß-D-Glucosides of Hydroxybenzoic and Hydroxycinnamic Acids — Their Synthesis and Determination in Berry Fruit and Vegetable
The derivatives of hydroxybenzoic and hy droxycinnamic acids are widespread in the plant kingdom. A considerable number of these deriva tives are well known [1], Nevertheless there is only little existing information about the glucosides of these compounds and their distribution. Syringic acid-O-ß-D-glucoside was detected in Anodendron affine. [2], as well as /»-hydroxybenzoic acid-O-ß-D-gluc...
متن کاملTrans-o-Hydroxycinnamic Acid Glucosylation in Cell-Free Extracts of Melilotus alba
The gIucosylation of trans-o-hydroxycinnamic acid has been demonstrated in cell-free extracts of MeliIotus alba. The reaction requires UDPG, a sulfhydryl compound, and an active extract from sweet clover leaves. The product of the reaction has been tentatively identified as trans-/3-D-glucosyl-o-hydroxycinnamic acid. I N T R O D U C T I O N Low molecular weight phenols which occur in living cel...
متن کاملAbsence of Dominance of the Cu Gene in Influencing o-Hydroxycinnamic Acid Content in Melilotus alba
The average content of o-hydroxycinnamic acid in sweetclover plants of the Cucu genotype was 36% of the level found in CuCu plants. Thus, the level of o-hydroxycinnamic acid in the Fl was more like the content of the cucu parent than that of the CuCu parent, indicating that cu was partially dominant over Cu. The calculated value for the degree of dominance of cu over Cu was +0.299. The partial ...
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ورودعنوان ژورنال:
- Science
دوره 139 3554 شماره
صفحات -
تاریخ انتشار 1963