Rhizonic acid

Occurs in majorii of lichens of genus Vanea and in Aheforia ochraleuea.-- dyst. from CaH.. M.p. 191° (186°). Insol. i O. Hyd.— rhizonic acid and p-cyrcinol. FeCU —> violet col. 

See Rhizonaldehyde and Isorhizonaldehyde. H3rdroxymethoxydimethylbenzoic Acid. See Rhizonic Acid and Isorhizonio Acid. 

Iso-rhizonic acid, 2-Methoxy-3,6-dimethyl-4-hydroxybenzoic acid (Iso-rhizoninsaure, 2-Methoxy-3,6-dimethyl-4-hydroxybenzoesaure)... 

Deriv Methyl iso-rhizonate, mp 146 °C (benzene or EtOH), from iso-rhizonic acid with the calculated amount of CHjNj in EtjO at 0 °C Lit Asahina and Fuzikawa 1932b... 

Rhizonic acid, 4-0-Metbyl-p-orcinolcarboxylic acid, 2-Hydroxy,3,6-dimethyl-4-methoxy-benzoic acid (Rbizoninsaure, 4-0-Metbyl-P-orcinolcarbonsaure, 2-Hydroxy-3,6-dimetbyl-4-metboxybenzoesaure)... 

Tsuda Y, Nakajima S, Udagawa S-I, Uzawa J (1980) The isolation, from Myrothecium species, and long-range selective proton decoupling C-NMR of rhizonic acid. J Nat Prod 43 467-471... 

Evernia prunastri has proved to be a particularly rich source of lichen compounds and extraction and g.c. — m.s. studies have revealed the presence of orcinol (99) 268, 269), 3-methoxy-5-methylphenol (100) 144), 3,5-dimethoxytoluene (101) 144), 2-chloro-3,5-dimethoxytoluene (102) 144), phenol 144), thymol 144), 2-chloro-3-methoxy-5-methylphenol (103) 144), methyl salicylate 144), methyl 4-O-methylorsellinate (90) 268, 269), and methyl (3-orcinolcarboxylate (104) (255). Rhizonic acid (105) has been isolated from Parmelia subnuda 215). 

Orsellinic acid (2- C) Phthalic acid Rhizonic acid... 

Cell line selection is one of the traditional and effective approaches to enhancing metabolite accumulation, and biochemical studies provide the fundamental information for the intentional regulation of secondary metabolism in plant cells. In a carrot suspension culture regulated by 2,4-dichlorophenoxyace-tic acid, Ozeki et al. [7] found that there was a correlation between anthocyanin synthesis and morphological differentiation for somatic embryogenesis they also demonstrated the induction and repression of phenylalanine ammonia lyase (PAL) and chalcone synthase correlated with formation of the respective mRNAs. Two biosynthetic enzymes, i. e., PAL and 3-hydroxymethylglutaryl-CoA reductase, were also related with shikonin formation in Lithospermum erythro-rhizon cultures [8]. 

These results were obtained for oilseed rape grown in the same acidic soil as above but which had been subjected to various rates of lime application, in order to investigate a broader range of pH values. A substantial decrease in Cu solubility as a consequence of rhizosphere alkalinization was also found consistently for tomato grown in two acidic Cu-contaminated vineyard soils, including the one described above, in another study where soil solution Cu was sampled by Rhizon microsamplers (Cornu et al., 2007). Similarly, a decrease in... 

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