Important Rare Plant Pigments

Davies, Kevin

doi:10.1002/9781119312994.apr0137

Cited by 6 publications

(2 citation statements)

References 119 publications

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“…Por fim, a enzima glutianona S-transferase (GST) atua em conjunto com transportadores de membranas vacuolares para garantir a transferência das antocianinas para dentro do vacúolo (Grotewold, 2006;Modolo et al, 2007). Normalmente, as antocianinas acumulam-se nos vacúolos de células epidérmicas de pétalas de flores e frutos (Martin & Gerarts, 1993), podendo também ser encontradas em órgãos vegetativos em resposta aos estresses abióticos e bióticos relacionados à radiação ultravioleta, temperatura, seca ou em defesa contra patógenos (Davies, 2004;Gould, 2004;Castellarin et al, 2007;Czemmel et al, 2009;Vogt, 2010;Katerova et al, 2012).…”

Section: Pigmentação Dos Filamentos Da Corona: a Via De Biossíntese D...unclassified

Desenvolvimento floral em maracujazeiro

Bombardi da Silva

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Section: Pigmentação Dos Filamentos Da Corona: a Via De Biossíntese D...unclassified

Desenvolvimento floral em maracujazeiro

Bombardi da Silva

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“…Chlorophylls are another relevant pigment class, that present in photosynthetic organisms such as plants, algae and cyanobacteria. Chlorophylls are the pigments that make plants green and are arguably the most important compounds on earth as they are required for the harvesting and transduction of light energy in photosynthesis [8]. These pigments are large molecules with a cyclic part (chlorine ring) bound to a metal ion (magnesium), which reflects green light.…”

Section: Introductionmentioning

confidence: 99%

Bulletin WKU

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Annotation. The total anthocyanins content, total carotenoid content and total content of chlorophylls a and b in leaves of fruit and berry crops common to the Western Kazakhstan region were analyzed using UV-vis spectrophotometry. Twelve plant species were studied in this work. Anthocyanins level in leaves varied from 0.041 to 0.532 mg/g, carotenoid levels were from 0.56 to 3.87 μg/g dry weight. The range of chlorophylls a and b content is significantly wider (2.15 to 14.07 and 1.8 to 9.1 µg/g respectively). Among the investigated plants R.canina has the highest levels of natural pigments. It has been observed that P.armeniaca is the plant richest in anthocyanins, in turn R.canina and A.ovalis was found to be richest in carotenoids. It was also found that the pigments content depends on plant species and the content of chlorophyll a exceeds the content of chlorophyll b from 1.19 to 2.75 times.

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Effect of β-cyclodextrin encapsulation on cytotoxic activity of acetylshikonin against HCT-116 and MDA-MB-231 cancer cell lines

Vukić

Vuković

Popović

et al. 2020

Saudi Pharmaceutical Journal

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Acetylshikonin (AcSh), as a red colored pigment found in roots of the plants from family Boraginaceae, showed excellent cytotoxic activity. Due to its hydrophobic nature, and thus poor bioavailability, the aim of this study was to prepare acetylshikonin/β-cyclodextrin (AcSh/β-CD) inclusion complex by using coprecipitation method, characterize obtained system by using UV/VIS, IR and 1H NMR spectroscopy, and determine cytotoxic activity. Phase solubility test indicated formation of AL-type binary system (substrate/ligand ratio was 1:1 M/M), with stability constant Ks of 306.01 M−1. Formation of noncovalent bonds between inner layer of the hole of β-CD and AcSh was observed using spectroscopic methods. Notable changes in chemical shifts of two protons (−0.020 ppm) from naphthoquinone moiety (C6-H and C7-H), as well as protons from hydroxyl groups (−0.013 and −0.009, respectively) attached to C5 and C8 carbons from naphthoquinone part indicate that the molecule of AcSh enters the β-CD cavity from the aromatic side. Cytotoxic activity against HCT-116 and MDA-MB-231 cell lines was measured by MTT test and clonogenic assay. Mechanisms of action of free AcSh and inclusion complex were assessed by flow cytometry. In comparison to free AcSh, AcSh/β-CD showed stronger short-term effect on HCT-116 cells and superior long-term effect on both cell lines. Inclusion complex induced more pronounced cell cycle arrest and autophagy inhibition, and induced increase in accumulation of intracellular ROS more effectively than free AcSh. In conclusion, AcSh/β-CD binary system showed better performances regarding cytotoxic activity against tested tumor cell lines.

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Important Rare Plant Pigments

Abstract: The sections in this article areIntroductionQuinonesIndigoQuinochalconesApocarotenoidsPhenylphenalenones and Related PigmentsMiscellaneous Plant PigmentsConcluding CommentsAcknowledgements

Cited by 6 publications

References 119 publications

Desenvolvimento floral em maracujazeiro

Desenvolvimento floral em maracujazeiro

Bulletin WKU

Effect of β-cyclodextrin encapsulation on cytotoxic activity of acetylshikonin against HCT-116 and MDA-MB-231 cancer cell lines

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