Effect of phenolics on plant amine oxidases

Srivastava, Santosh K.; Naik, B.I.; Raj, Adaikalam

doi:10.1016/s0031-9422(82)85009-7

Cited by 7 publications

(3 citation statements)

References 9 publications

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“…PVP probably exerted its effect by adsorbing phenolics present in the plant extract. In pea seedlings some phenolics have been shown to inhibit DAO activity as a result of their binding to the enzyme protein or by decreasing the level of enzyme synthesis (Srivastava et al 1982). The different sensitivity of H and N callus to PVP may reflect differences in the nature and/or amount of phenolics present in these two cell lines.…”

Section: Discussionmentioning

confidence: 99%

Polyamine metabolism and ethylene biosynthesis in normal and habituated sugar beet callus

Biondi¹,

Hagège²,

Rossini³

et al. 1993

Physiol Plant

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N. 1993. Polyamine metabolism and ethylene biosynthesis in normal and habituated sugar beet callus. -Physiol. Plant. 89: 699-706.The optimal assay conditions and the trend with time in culture (28 days) of arginine decarboxylase (ADC; EC 4.1.1.19), omithine decarboxylase (ODC; EC 4.1.1.17) and diamine oxidase (DAO; EC 1.4.3.6) activities in habituated (H) and normal (N) auxinand cytokinin-requiring sugar beet callus were compared. Although the response to variations in buffer pH and EDTA and pyridoxal phosphate (PLP) concentrations varied for ADC and ODC activities between the two callus types, pH 8.3, 50 |xM PLP and 5 mM EDTA were generally optimal or near-optimal for both H and N callus. In most cases the addition of ornithine or arginine in the ADC and ODC assays, respectively, given to block the interconversion between the two substrates, resulted in lower "•COj recovery. DAO activity was very differently affected in H and N callus by the presence of polyvinylpyrrolidone in the extraction buffer. However, in both cases, this activity increased with time in culture. ADC activity was always predominant in both cell lines and always higher in N callus. In the latter, ADC activity rose sharply between days 14 and 21 and then leveled off while in H callus it increased steadily from day 14 onwards. ODC activity was also higher in N callus and peaked sharply on day 21 while in H callus it was not detectable in the second half of the culture period. In both cell lines this activity was low or nil on day 28. 3,4-['*'C]-methionine incorporation into ethylene and polyamines was also compared in N and H callus. In the latter, ethylene synthesis was lower and ['^C]-spermidine formation higher than in N callus. This is in accord with the significantly higher spermidine titres found in H callus.

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Section: Discussionmentioning

confidence: 99%

Polyamine metabolism and ethylene biosynthesis in normal and habituated sugar beet callus

Biondi¹,

Hagège²,

Rossini³

et al. 1993

Physiol Plant

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“…This is part because a considerable number of organisms are not amenable to artificial cultivation that would allow mass‐production of the compounds of interest . Low and inconsistent production level of desired products and slow growth of the producing hosts can add to the difficulty . Native natural products can also be too toxic or have poor bioavailability to be used as drugs .…”

Section: Introductionmentioning

confidence: 99%

Elucidation of Biosynthetic Pathways of Natural Products

Kishimoto

Tsunematsu

Sato

et al. 2017

The Chemical Record

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During the last decade, we have revealed biosynthetic pathways responsible for the formation of important and chemically complex natural products isolated from various organisms through genetic manipulation. Detailed in vivo and in vitro characterizations enabled elucidation of unexpected mechanisms of secondary metabolite biosynthesis. This personal account focuses on our recent efforts in identifying the genes responsible for the biosynthesis of spirotryprostatin, aspoquinolone, Sch 210972, pyranonigrin, fumagillin and pseurotin. We exploit heterologous reconstitution of biosynthetic pathways of interest in our study. In particular, extensive involvement of oxidation reactions is discussed. Heterologous hosts employed here are Saccharomyces cerevisiae, Aspergillus nidulans and A. niger that can also be used to prepare biosynthetic intermediates and product analogs by engineering the biosynthetic pathways using the knowledge obtained by detailed characterizations of the enzymes. (998 char.).

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“…Phenolic compounds came into lime light since late seventies as naturally occurring growth regulators playing a vital role as secondary metabolites in growth and developmental processes of plants (Kefeli and Kut~ek 1977, Apte and Laloraya 1982, Srivastava et al 1982, Kalita and Shah 1983, Mangat et al 1988. These compounds, also, play an important role in the initiation and development of nodules (Dhir and Lalitha 1989).…”

Section: Introductionmentioning

confidence: 99%

Effect of phenolic compounds on symbiotic nitrogen fixation in pigeonpea(Cajanus cajan (L.) Millsp.)

Dhir¹,

Rao²,

Singh³

et al. 1992

Biol. plant.

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The effect of different phenolic compounds: p-hydroxybenzoic acid, resorcinol and chlorogenic acid (mono-, di-and polyphenol) was studied on nodulation and related metabolic processes in pigeonpea (Cajanus cajan L. cv. Al-15). Nitrogenease activity, leghaemoglobin and ascorbic acid content of the nodules increased with the application of phenols. Phenols increase the contents of amino acids, proteins and total soluble ~arbohydrates in the nodules as reserve food materials.

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Effect of phenolics on plant amine oxidases

Cited by 7 publications

References 9 publications

Polyamine metabolism and ethylene biosynthesis in normal and habituated sugar beet callus

Polyamine metabolism and ethylene biosynthesis in normal and habituated sugar beet callus

Elucidation of Biosynthetic Pathways of Natural Products

Effect of phenolic compounds on symbiotic nitrogen fixation in pigeonpea(Cajanus cajan (L.) Millsp.)

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