scispace - formally typeset

JournalISSN: 0031-9422

Phytochemistry 

About: Phytochemistry is an academic journal. The journal publishes majorly in the area(s): Triterpene & Diterpene. It has an ISSN identifier of 0031-9422. Over the lifetime, 31205 publication(s) have been published receiving 966803 citation(s). The journal is also known as: botanical chemistry & plant chemistry.
Topics: Triterpene, Diterpene, Glucoside, Bark, Glycoside
Papers
More filters

Journal ArticleDOI
Edwin Pahlich1, Chr. Gerlitz1Institutions (1)
TL;DR: From the kinetic data, it becomes evident that the reductive amination reaction is highly adaptive to the ammonium environment.
Abstract: A stopped flow kinetic analysis has been performed with a homogeneous protein fraction of plant glutamate dehydrogenase. The enzyme exerts strong negative cooperativity with ammonium as variable substrate. The limiting initial rate constants for low substrate concentrations, as calculated from the kinetic data, indicate that the catalytic efficiency of the enzyme increases at low ammonium concentrations. From this it becomes evident that the reductive amination reaction is highly adaptive to the ammonium environment.

13,276 citations


Journal ArticleDOI
TL;DR: Some of the recent advances in flavonoid research are reviewed and the role of anthocyanins and flavones in providing stable blue flower colours in the angiosperms is outlined.
Abstract: Some of the recent advances in flavonoid research are reviewed. The role of anthocyanins and flavones in providing stable blue flower colours in the angiosperms is outlined. The contribution of leaf flavonoids to UV-B protection in plants is critically discussed. Advances in understanding the part played by flavonoids in warding off microbial infection and protecting plants from herbivory are described. The biological properties of flavonoids are considered in an evaluation of the medicinal and nutritional values of these compounds.

3,199 citations


Journal ArticleDOI
Jed W. Fahey1, Amy T. Zalcmann1, Paul Talalay1Institutions (1)
TL;DR: This review addresses the complex array of glucosinolates, the precursors of isothiocyanates, present in sixteen families of dicotyledonous angiosperms including a large number of edible species including Brassica vegetables.
Abstract: Glucosinolates (beta-thioglucoside-N-hydroxysulfates), the precursors of isothiocyanates, are present in sixteen families of dicotyledonous angiosperms including a large number of edible species. At least 120 different glucosinolates have been identified in these plants, although closely related taxonomic groups typically contain only a small number of such compounds. Glucosinolates and/or their breakdown products have long been known for their fungicidal, bacteriocidal, nematocidal and allelopathic properties and have recently attracted intense research interest because of their cancer chemoprotective attributes. Numerous reviews have addressed the occurrence of glucosinolates in vegetables, primarily the family Brassicaceae (syn. Cruciferae; including Brassica spp and Raphanus spp). The major focus of much previous research has been on the negative aspects of these compounds because of the prevalence of certain "antinutritional" or goitrogenic glucosinolates in the protein-rich defatted meal from widely grown oilseed crops and in some domesticated vegetable crops. There is, however, an opposite and positive side of this picture represented by the therapeutic and prophylactic properties of other "nutritional" or "functional" glucosinolates. This review addresses the complex array of these biologically active and chemically diverse compounds many of which have been identified during the past three decades in other families. In addition to the Brassica vegetables, these glucosinolates have been found in hundreds of species, many of which are edible or could provide substantial quantities of glucosinolates for isolation, for biological evaluation, and potential application as chemoprotective or other dietary or pharmacological agents.

2,487 citations


Journal ArticleDOI
Augustin Scalbert1Institutions (1)
TL;DR: Tannin toxicity for fungi, bacteria and yeasts is reviewed and compared to toxicity of related lower molecular weight phenols and the dependence of toxicity on tannin structure is examined.
Abstract: Tannin toxicity for fungi, bacteria and yeasts is reviewed and compared to toxicity of related lower molecular weight phenols. The dependence of toxicity on tannin structure is examined. The different mechanisms proposed so far to explain tannin antimicrobial activity include inhibition of extracellular microbial enzymes, deprivation of the substrates required for microbial growth or direct action on microbial metabolism through inhibition of oxidative phosphorylation. A further mechanism involving iron deprivation is proposed. Many microorganisms can overcome plant defences based on tannins. They may detoxify tannins through synthesis of tannin- complexing polymers, oxidation, tannin biodegradation or synthesis of siderophores.

2,005 citations


Journal ArticleDOI
Abstract: The hydrolysis of proanthocyanidins to anthocyanidins in n-BuOH-HCl (95:5) has been shown to be an autoxidation, the yield of anthocyanidin being critically dependent on trace metal-ion impurities. Reproducible yields of anthocyanidin may be achieved if iron (III) salts are added to the reaction medium, and a standard method of analysis of proanthocyanidins based on use of an n-BuOH-HCl-FeIII mixture is given. The ratio of absorbance maxima of the cyanidin (550 nm) produced to that near 280 nm for the original procyanidin polymer solution was ∼ 3.5.

1,963 citations


Network Information
Related Journals (5)
Tetrahedron Letters

96.8K papers, 1.9M citations

84% related
Tetrahedron

49.1K papers, 1.2M citations

83% related
Planta

15.4K papers, 686.1K citations

82% related
Carbohydrate Research

18.4K papers, 480.7K citations

82% related
Physiologia Plantarum

13.1K papers, 556.6K citations

82% related
Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
202247
2021309
2020262
2019216
2018221
2017214