Phenols and coumarins of tomato plants

1971 ◽  
Vol 49 (12) ◽  
pp. 2097-2100 ◽  
Author(s):  
J. Méndez ◽  
Stewart A. Brown
Keyword(s):  
Salicylic Acid ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Strong Evidence ◽  
Hydroxycinnamic Acids ◽  
Ultraviolet Spectroscopy ◽  
Tomato Plants ◽  
Chromatographic Data ◽  
Layer Chromatography ◽  
Salicylic Acids

Vanillic and salicylic acids, and the coumarins marmesin, herniarin, esculetin, and bergapten were identified as constituents of whole tomato plants by paper and thin-layer chromatography and ultraviolet spectroscopy in the presence of diagnostic reagents. Strong evidence for the occurrence of p-hydroxybenzoic, syringic, ferulic, and p-hydroxycinnamic acids was obtained on the basis of chromatographic data and chromogenic reactions. Only the last two compounds and salicylic acid had been reported to occur in tomato plants. Biosynthetic implications of the occurrence of these phenolics are considered.

II. Mitt.: Verhalten in Tomatenpflanzen

1968 ◽  
Vol 23 (6) ◽  
pp. 834-838 ◽  
Author(s):  
Falko Grimmer ◽  
Wolfgang Dedek ◽  
Eberhard Leibnitz
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Alkyl Chain ◽  
Organophosphorus Compounds ◽  
Tomato Plants ◽  
Aqueous Buffer ◽  
Tert Butyl ◽  
Buffer Solutions ◽  
Layer Chromatography ◽  
Radio Thin Layer Chromatography

The metabolism of dimethoate and its N-butyl homologues in tomato plants has been studied by use of 32P and 35S labelled initial products. The preparation of thiol-35S-labelled dimethoate is described. Formation and break down of dimethoxon and N-tert.-butyl-dimethoxon have been measured by radio-thin layer chromatography. The calculated biological half times have been compared with those in aqueous buffer solutions; remarkable differences between dimethoate and dimethoxon derivatives have been observed. The extension of the N-alkyl chain causes a more rapid biological breakdown. The technique described is also useful for the comparison of other organophosphorus compounds (OPC).

Benzoic and salicylic acids isolated from a glycoside of aspen bark and their effect on Hypoxylon pruinatum

1969 ◽  
Vol 47 (8) ◽  
pp. 1295-1301 ◽  
Author(s):  
Martin Hubbes
Keyword(s):  
Salicylic Acid ◽  
Benzoic Acid ◽  
Thin Layer ◽  
Agar Medium ◽  
Synthetic Medium ◽  
Malt Agar ◽  
Inhibition Of Growth ◽  
Total Inhibition ◽  
Layer Chromatography ◽  
Salicylic Acids

Benzoic and salicylic acids, isolated from an unknown glycoside of aspen bark, were identified as the main fungistatic factors of this compound against Hypoxylon pruinatum (Klotzsche) Cke. The identity of the carboxylic acids was established by thin-layer chromatography and ultraviolet and infrared spectrophotometry.On a malt agar medium, benzoic acid inhibited the growth of the fungus at 1 × 10−3 M, whereas salicylic acid at the same concentration stimulated growth. Complete inhibition of growth of the fungus was obtained with benzoic acid at a concentration of 4 × 10−3 M and with salicylic acid at 5 × 10−3 M. Total inhibition was also obtained when both benzoic and salicylic acids, each at a concentration of 2 × 10−3 M, were simultaneously present in the malt agar medium.On a synthetic medium, benzoic acid and glucose, each at a concentration of 1 × 10−3 M, inhibited the growth of the fungus. At this concentration salicylic acid had no effect.When ammonium nitrate was replaced simultaneously by asparagine, alanine, and glutamine, benzoic acid at 2 × 10−3 M, and glucose at 3 × 10−3 M promoted the growth of the fungus. The same growth was also obtained when benzoic acid at 1 × 10−3 M and glucose at 1 × 10−3 M were both added to the medium.

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