Environmental Factors Affecting Productivity, Indican Content, and Indigo Yield in Polygonum tinctorium Ait., a Subtropical Crop Grown under Temperate Conditions
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- 作者：Luciana G. Angelini ; Sabrina Tozzi ; and Nicoletta Nassi o Di Nasso
- 刊名：Journal of Agricultural and Food Chemistry
- 出版年：2004
- 出版时间：December 15, 2004
- 年：2004
- 卷：52
- 期：25
- 页码：7541 - 7547
- 全文大小：376K
- 年卷期：v.52,no.25(December 15, 2004)
- ISSN：1520-5118
文摘
Polygonum tinctorium Ait. is a herbaceous subtropical annual plant, belonging to the familyPolygonaceae. Within the cells of its leaves P. tinctorium accumulates large amounts of a colorlessglycoside, indican (indoxyl 
-D-glucoside), from which the blue dye indigo is synthesized. P. tinctoriumis well-known in Japan, where it had been cultivated to produce natural indigo for textile dyeing,whereas it represents a potentially interesting new crop in Europe. To better understand the effectsof environmental parameters on P. tinctorium crop production and indigo yield, field experimentswere carried out in central Italy under temperate climate. Three lines were tested during the 2001and 2002 growing seasons, and plant/leaf yields as well as indican contents were evaluated. Theresults showed that P. tinctorium grown in temperate climate conditions can be harvested three timesa year. Yields of 82 and 120 t ha-1 of fresh plant yield were obtained in 2001 and 2002, respectively.The contrasting weather conditions between the two years significantly affected biomass production,which was higher in the 2002 season, characterized by wet weather conditions. The cycle lengthfrom sowing to the last harvest was accomplished in 229-238 days when plants had accumulated2017-2018 
C. Green leaves accounted for 40-45% by weight of fresh plant tissue and contained11-20 g kg-1 indican. The three lines did not significantly differ in the main productive parametersor in fresh leaf indican content (14.1 g kg-1 mean value). Photosynthetic active radiation influencesindican leaf production according to the model y = 0.0004x + 8.566 (P < 0.01, correlation coefficient= 0.818). Indican content ranged from 12 to 25 g kg-1 of fresh leaves with PAR daily values from10000 to 40000 mEinstein m-2 (recorded in May and at the end of July-beginning of August,respectively). The results indicate that in nonlimiting rainfall conditions a very high indican contentand a potentially high indigo yield can be obtained by cultivating P. tinctorium in this pioneergeographical area.Keywords: Indican; Polygonum tinctorium; leaves; yield; indigo; photosynthetically active radiation
-D-glucoside), from which the blue dye indigo is synthesized. P. tinctoriumis well-known in Japan, where it had been cultivated to produce natural indigo for textile dyeing,whereas it represents a potentially interesting new crop in Europe. To better understand the effectsof environmental parameters on P. tinctorium crop production and indigo yield, field experimentswere carried out in central Italy under temperate climate. Three lines were tested during the 2001and 2002 growing seasons, and plant/leaf yields as well as indican contents were evaluated. Theresults showed that P. tinctorium grown in temperate climate conditions can be harvested three timesa year. Yields of 82 and 120 t ha-1 of fresh plant yield were obtained in 2001 and 2002, respectively.The contrasting weather conditions between the two years significantly affected biomass production,which was higher in the 2002 season, characterized by wet weather conditions. The cycle lengthfrom sowing to the last harvest was accomplished in 229-238 days when plants had accumulated2017-2018 C. Green leaves accounted for 40-45% by weight of fresh plant tissue and contained11-20 g kg-1 indican. The three lines did not significantly differ in the main productive parametersor in fresh leaf indican content (14.1 g kg-1 mean value). Photosynthetic active radiation influencesindican leaf production according to the model y = 0.0004x + 8.566 (P < 0.01, correlation coefficient= 0.818). Indican content ranged from 12 to 25 g kg-1 of fresh leaves with PAR daily values from10000 to 40000 mEinstein m-2 (recorded in May and at the end of July-beginning of August,respectively). The results indicate that in nonlimiting rainfall conditions a very high indican contentand a potentially high indigo yield can be obtained by cultivating P. tinctorium in this pioneergeographical area.Keywords: Indican; Polygonum tinctorium; leaves; yield; indigo; photosynthetically active radiation