Time-course tracer studies on the metabolism of cinnamic acid in Cestrum poeppigii

Molderez, Micheline; Nagels, L.J.; Parmentier, F.

doi:10.1016/s0031-9422(00)88686-0

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…The considerable reduction of oleuropein per fruit shows clearly that it is not an inert metabolic compound but is reutilized during the maturation phase. This phenomenon has often been stressed for other phenolic compounds in various plant organs (Strack et al, 1978;Linscheid et al, 1980), and it should certainly be related to the active turnover of certain phenolic metabolites (Molderez et al, 1978; Barz and Kóster, 1981). In the case of the olive, the successive evolution of oleuropein and verbascoside and their biochemical relationship may suggest the existence of a metabolic relationship between these two compounds.…”

Section: Resultsmentioning

confidence: 99%

Importance and evolution of phenolic compounds in olive during growth and maturation

Amiot¹,

Fleuriet²,

Macheix³

1986

J. Agric. Food Chem.

375

305

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The main phenolic compounds (oleuropein, verbascoside, rutin, luteolin 7-glucoside) were separated and determined by HPLC for three varieties (Picholine, Lucques, Salonenque) during the development and maturation of the fruit and for eight other varieties (Bouteillan, Verdale, Cailletier, Zrappola, Tanche, Lll, L365, VP7) just during the maturation. Oleuropein content could reach 14% of the dry matter in young fruit and remains very important at harvest for green picked varieties. Furthermore, small-fruit varieties are characterized by high oleuropein and low verbascoside contents, while large-fruit varieties are characterized by low oleuropein and high verbascoside contents.

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Section: Resultsmentioning

confidence: 99%

Importance and evolution of phenolic compounds in olive during growth and maturation

Amiot¹,

Fleuriet²,

Macheix³

1986

J. Agric. Food Chem.

375

305

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“…This is demonstrated in the experiments depicted in Figures 1 and 3 (4,11,14,16), it was possible that esters might be involved in the pathway for glyceollin production so both the ester and the free acid contents of treated tissues were analyzed. Representative chromatograms of the free and hydrolyzed ester fractions are shown in Figure 4.…”

Section: Resultsmentioning

confidence: 99%

Metabolic Regulation during Glyceollin Biosynthesis in Green Soybean Hypocotyls

Kimpel

Kosuge²

1985

Plant Physiol.

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The accumulation of the isoflavonoid phytoalexin, glyceollin, occurs in hypocotyls of green soybean seedlings (Glycine max L. Merr. cv Harosoy 63) in response to the injection of a glucan elicitor isolated from the mycelial walls of the fungus, Phytophthora megasperma f. sp. glycinea. This accumulation, which levels off after 24 hours, is preceded by a dramatic, transient rise in extractable activities of two early enzymes in the biosynthetic pathway, phenylalanine ammonia-lyase (PAL) and p-coumaryl CoA ligase (pCL). The maximum amount of extractable activity occurs 12 to 16 hours after elicitor treatment and is coincident with the most rapid period of glyceollin accumulation. These results suggest a regulatory role for these early enzymes in the biosynthesis of this secondary metabolite. High performance liquid chromatography analysis of the early intermediates in the pathway further corroborates this hypothesis. The relative pool size and rate of turnover of p-coumaric acid, an early intermediate in glyceollin production, increase during the period of rapid increases in enzyme activities. Removal of cotyledons from elicitor-treated seedlings reduces glyceollin accumulation approximately 70%. This limitation of phytoalexin accumulation by cotyledon removal is correlated with a similar cotyledon effect on reduction of extractable activities of both PAL and pCL as well as a decrease in the flux of carbon through the p-coumaric acid pool. This research further supports the hypothesis that early enzymic steps in a biosynthetic pathway diverting carbon from primary to secondary metabolites function as regulatory control points.

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“…Our data also contribute to our knowledge on the metabolism of herbicildes and synthetic auxins in plants where glucose esters were established as the primary detoxification products [29][30][31]451. Glucose esters from both endogenously formed or exogenously applied aromatic acids are metabolically active and show high turnover rates [5,32,331. The same is true for the glucose esters as shown in table I.…”

Section: Primary Productmentioning

confidence: 99%

Metabolism of Aromatic Acids in Plant Cell Suspension Cultures^*

Schlepphorst¹,

Barz²

1979

Planta Med

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Part of these studies were presented at the Annual Meeting of the Gesellschaft fur Arznei-rying ratios [4, 131. Type and extent of pflanzenforschung, Miinster 1978 (see Planta. seem On plant rnedica 33, 302 [1978]). species and chemical strucmre of the Abbreviations: N A A = a-naphthylacetic acid, acid involved. IAA = 8-indoleacetic acid, 234 D = 2,4-Plant cell svspension cultures are suidichlorophenoxyacetic acid; 'H-NMR = proton nuclear magnetic resonance spectroscopy, table experimental systems to elucidate DMSO-d, = hexadeuteratcd dirnethylsulfoxide, bxic aspects of reactions rn = multiplett, d = doublett, sh = shoulder. in ~l a n t s [lo-131. In continuation of

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Time-course tracer studies on the metabolism of cinnamic acid in Cestrum poeppigii

Cited by 23 publications

References 12 publications

Importance and evolution of phenolic compounds in olive during growth and maturation

Importance and evolution of phenolic compounds in olive during growth and maturation

Metabolic Regulation during Glyceollin Biosynthesis in Green Soybean Hypocotyls

Metabolism of Aromatic Acids in Plant Cell Suspension Cultures^*

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Time-course tracer studies on the metabolism of cinnamic acid in Cestrum poeppigii

Cited by 23 publications

References 12 publications

Importance and evolution of phenolic compounds in olive during growth and maturation

Importance and evolution of phenolic compounds in olive during growth and maturation

Metabolic Regulation during Glyceollin Biosynthesis in Green Soybean Hypocotyls

Metabolism of Aromatic Acids in Plant Cell Suspension Cultures*

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Metabolism of Aromatic Acids in Plant Cell Suspension Cultures^*