Primary flavonoids in marigold dye: extraction, structure and involvement in the dyeing process

Abstract

Flavonoids extracted from marigold flowers were investigated for their dyeing potential. Patulitrin (1) and patuletin (2) were isolated and their structures established using NMR and HPLC-MS. These compounds were identified as the main flavonoids present in the dyeing bath. Following the dyeing process, it was demonstrated that aglycone 2 bound more strongly to wool fibres than its glucoside 1. Moreover, analysis focused on 1 and 2 dynamics during plant growth revealed that these components were only found in flowers during and after flowering. The influence of growing location was also investigated and it appeared that cultivation under Mediterranean conditions enhanced biosynthesis of 1 and 2 . Finally, several solvents were tested for their potential to extract the flavonoids: the use of a water-ethanol mixture gave a high extraction efficiency and allowed selective extraction of 1 and 2. The implications of these results are discussed in relation to the development of marigold as a potential dyeing plant.

Eco-friendly dyeing of wool using natural dye from weld as co-partner with synthetic dye

“…Some of them have also been reported to possess anti-UV and anti-microbial properties. As the present trend throughout the world is shifting towards the use of eco-friendly and biodegradable commodities, the demand for natural dyes is increasing day by day (Ali et al, 2009;Guinot et al, 2008).…”

Extracts and semi-purified fractions of Tagetes patula flowers in the control of root-knot nematodes

“…The flowers and leaves of Tagetes spp. contain terpenes (PRAKASH et al, 2012) and flavonoids (GUINOT et al, 2008;FAIZI et al, 2011). Free and/ or methoxylated aglycones, such as kaempferol and quercetin (IVANCHEVA; ZDRAVKOVA, 1993), patuletin (GUINOT et al, 2008), quercetagetin (TARPO, 1969), and luteolin and quercetagetin 5-methyl ether (PICCAGLIA et al, 1998) are among the flavonoids that have been isolated and identified, indicating a predominance of this class of compounds.…”

Tagetes patula

“…Flavonoids patulitrin (patuletin 7-O -glucoside), patuletin, quercetagetin, quercetagetin 7-O -glucoside, luteolin (Bhardwaj et al 1980a ), allopatuletin (3,6,7,3′,4′-pentahydroxy-5-methoxyfl avone) a quercetagetin monomethyl ether (Bhardwaj et al 1980a , b ), and kaempferol) and quercetin-like structures (Ivancheva and Zdravoka 1993 ) (patulitrin (patuletin 7-O -glucoside), patuletin, quercetagetin 7-O -glucoside) and several unknown minor fl avonoids (Guinot et al 2008 ) (pateletin, patulitrin, patuletin cinnamate derivative, patuletin benzoate derivative (Faizi et al 2008 )) were isolated from the fl owers. From the polar extract and fractions of yellow fl owers of Tagetes patula , phenolic compounds (fl avonoids and phenolic acids) were isolated (Faizi et al 2011b ).…”