Sowing date, transplanting, plant density and nitrogen fertilization affect indigo production from Isatis species in a Mediterranean region of Spain

Abstract

Sowing date, transplanting, plant density and nitrogen fertilization affect indigo production from Isatis species in a Mediterranean region of Spain Sales, E

Extraction of Indigo from Some Isatis species and Dyeing Standardization Using Low-technology Methods

“…Indigo content of leaves was extracted following Stoker et al (1998) and Sales et al (2006) with some modifications. The chopped leaves (approx.…”

“…Finally, indigo concentrations were calculated by using the indigo calibration curve. Calibration curve was prepared by dissolving indigo standard (Sigma) in ethyl acetate (Sales et al 2006). Experiments were repeated three times and mean values were used.…”

“…Therefore, in this study, different Isatis species produced different indigo yield as a result of their genetic makeup. High temperature, light intensity and inadequate rainfall could limit the plant growth and indigo amount (Stoker et al 1998;Sales et al 2006). Therefore, the decrease in indigo in late-June could be due to the climatic changes.…”

“…Successful cultivation of I. tinctoria in mountain and marginal areas offers an alternative to traditionally grown crops (Spataro et al 2007); therefore, I. tinctoria could be an important indigo source for natural dyeing applications. There are several reports on the extraction of indigo from I. tinctoria leaves (Balfour-Paul 1998;Stoker et al 1998;Gilbert et al 2004;Tozzi et al 2005;Sales et al 2006;Angelini et al 2007;Rocha et al 2011). Simple extraction method is required for an effective and ecological production of natural indigo (Bechtold et al 2002).…”

Changes of Fresh Leaf Yield and Colorant Level with Different Transplanting and Harvest Time in Persicaria tinctoria H. Gross

“…수확시기는 이식 후 60-80일경 녹색의 푸른 잎에 검붉은 반점이 생기는 시기에 수확하는 것이 좋지만 품종에 따라서는 개화시기에 차이가 많고 작부체계에 따라 수확시 기가 달라진다 (Heo, 2009). 유럽에서 주로 재배되는 십자화 과에 속하는 염료식물인 대청이나 쪽을 대상으로 경엽 수량 및 인디고 전구물질의 시기별 변화 등에 대한 연구결과가 보고되고 있다 (Angelini et al, 2004;Sales et al, 2006;Campeol et al, 2006). 그리고 대청 근연종(Isatis indigotica Fort.…”