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Gilbert, KG; Maule, Hamish G.; Rudolph, B.; Lewis, Mervyn; Vandenburg, H. J.; Sales, Ester; Tozzi, Sabrina; Cooke, David T.

doi:10.1021/bp0300624

Cited by 60 publications

(23 citation statements)

References 3 publications

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“…The indican results obtained herein were close to the previous studies (Kokubun et al 1998;Gilbert et al 2004;Zou and Koh 2007;Rocha et al 2011;Campeol et al 2006;Angelini et al 2007). Indirubin results were similar or lower than those in the previous studies (Liau et al 2007;Gilbert et al 2004;Zou and Koh 2007;Chen et al 2011).…”

Section: Resultssupporting

confidence: 89%

“…Indirubin results were similar or lower than those in the previous studies (Liau et al 2007;Gilbert et al 2004;Zou and Koh 2007;Chen et al 2011). Indigo content (2.80 mg/ g) was previously reported by our research group (Karaman et al 2016).…”

Section: Resultssupporting

confidence: 89%

“…Indigo content (2.80 mg/ g) was previously reported by our research group (Karaman et al 2016). The results were higher than in the reports by Gilbert et al (2004) and Campeol et al (2006) but lower than in the study by Kokubun et al (1998). The difference in literature concerned their content and quantification might be attributed to the plant species, extraction method, and harvesting time.…”

Section: Resultscontrasting

confidence: 77%

“…The blue dye indigo is one common natural dye stuff and it is a general name addressed to the different plant species including Isatis indigotica and Isatis tinctoria (Brassicaceae), Baphicacanthus cusia (Acanthaceae), Polygonum tinctorium (Polygonaceae), Indigofera suffrutticosa and Indigofera tinctoria (Fabaceae) but interestingly, indigo plants do not contain indigo blue but instead they accumulate the indigo precursors including indican and isatan and also some indole derivatives such as isatin, indirubin, hydroxyl indoles and their glucosides (Gilbert et al 2004;Zou and Koh 2007). The indigo blue is one of the world's most important industrial chemicals but it has been progressively replaced with synthetic ones.…”

Section: Introductionmentioning

confidence: 99%

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The role of natural indigo dye in alleviation of genotoxicity of sodium dithionite as a reducing agent

et al. 2016

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Indigo blue is a natural dye used for thousands of years by civilizations to dye fabric blue and it is naturally obtained from Isatis tinctoria. I. tinctoria is not only used for extraction of indigo blue color but also used medicinally in Traditional Chinese Medicine because of its active compounds. Sodium dithionite (Na 2 S 2 O 4 ) is used in dye bath for indigo blue extraction, but this reducing agent and its derivatives are major pollutants of textile industry and subsequently have hazardous influences on public health. Herein, the present study was designed to obtain the high yield of natural indigo dye but with low possible toxic effect. In this context, genotoxic effects of particular combinations of natural dye solutions obtained from Isatis tinctoria subsp. tomentolla with Na 2 S 2 O 4 as reducing agent were investigated. Dye solutions were obtained using two different pH levels (pH 9 and 11) and three different concentrations of Na 2 S 2 O 4 (2.5, 5 and 10 mg/ml). In addition to the dye solutions and reducing agent, aqueous extracts of I. tinctoria were assessed for their genotoxicity on human lymphocytes. For in vitro testing of genotoxicity, chromosomal aberrations (CAs), sister chromatid exchanges (SCEs) and mitotic indexes (MI) assays were used. Accordingly, Na 2 S 2 O 4 caused significant increases in CA and SCE as well decrease in MI but the genotoxic effects of sodium dithionite were reduced with natural indigo dye. As a result, aqueous extracts of Isatis leaves removed the toxic effects of sodium dithionite and showed anti-genotoxic effect. For the optimal and desired quality but with less toxic effects of natural dye, 2.5 mg/ml (for wool yarn) and 5 mg/ml (for cotton yarn) of Na 2 S 2 O 4 doses were found to be the best doses for reduction in the dye bath at Ph 9.

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Section: Resultssupporting

confidence: 89%

Section: Resultssupporting

confidence: 89%

Section: Resultscontrasting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

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The role of natural indigo dye in alleviation of genotoxicity of sodium dithionite as a reducing agent

et al. 2016

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“…The indican content was spectrophotometrically measured following modifications of the method reported elsewhere (Angelini et al, 2004;Gilbert et al, 2004). In brief, leaf disks (100 mg) from fully expanded secondary leaves were placed in 500 μL of distilled water at 100°C for 10 min.…”

Section: Measurement Of Indicanmentioning

confidence: 99%

Comparison of Two Harvesting Methods for the Continuous Production of Indigo Plant (Polygonum Tinctorium) Leaves in a Closed-Cultivation System

Sakamoto

Kim

Imoto

et al. 2017

SAR

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Although the blue dye indigo has been chemically synthesized for over a century, there is an increasing interest in the indigo plant (Polygonum tinctorium) as a source of natural dyes and medicines. To maintain a stable supply of P. tinctorium throughout the year, we examined the effect of two harvesting methods on the leaf yield of this plant under a closed-cultivation system. With method 8c-M, all shoot branches >8 cm of the stem bottom were harvested and under method 2b-M, all branches, but two, were harvested at the stem bottom. Both methods enabled sustainable leaf yields from the same plants over 1 year. The total weight of shoot branches harvested by 8c-M was 1.86-3.11 times higher that of shoot branches harvested by 2b-M. Harvesting by 8c-M resulted in shoot branch weights lower than those from plants harvested with the 2b-M. Leaf/shoot ratio was increased in plants harvested by 8c-M. The content of indican, the precursor of indigo, in leaves was not significantly different between the two harvesting methods. Our data may provide a new continuous cultivation method of leaf crops all over years in controlled-cultivation systems.

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Indigo—Production and Properties

John1

Angelini2

2023

Handbook of Natural Colorants

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Untitled

Cited by 60 publications

References 3 publications

The role of natural indigo dye in alleviation of genotoxicity of sodium dithionite as a reducing agent

The role of natural indigo dye in alleviation of genotoxicity of sodium dithionite as a reducing agent

Comparison of Two Harvesting Methods for the Continuous Production of Indigo Plant (Polygonum Tinctorium) Leaves in a Closed-Cultivation System

Indigo—Production and Properties

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