Effect of light intensity on methylxanthine contents of Ilex paraguariensis A. St. Hil.

被引：58

作者：

Coelho, Geraldo C.

Rachwal, Marcos F. G.

Dedecek, Renato A.

Curcio, Gustavo R.

Nietsche, Klaus

Schenkel, Eloir P.

机构：

[1] Univ Reg Noroeste Estado Rio Grande do Sul, Dept Biol & Quim, BR-98700000 Ijui, RS, Brazil

[2] CNPF, EMBRAPA, BR-38411000 Colombo, PR, Brazil

[3] Emater, Sao Mateus do Sul, PR, Brazil

[4] Univ Fed Santa Catarina, Dept Ciencias Farmaceut, CCS, BR-88040900 Florianopolis, SC, Brazil

来源：

BIOCHEMICAL SYSTEMATICS AND ECOLOGY | 2007年 / 35卷 / 02期

关键词：

caffeine; defence and growth trade-off; secondary metabolism; shading; theobromine; Ilex paraguariensis;

D O I：

10.1016/j.bse.2006.09.001

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Mate (Ilex paraguariensis A. St. Hil.) is a shade-tolerant species, frequently cultivated on agroforestry systems or even in monoculture. Secondary metabolism of mate includes the methylxanthines, caffeine and theobromine. Shading could alter the quantitative profile of these compounds in the plant, and since the secondary chemistry of mate is decisive to determine the quality of raw material, the caffeine and theobromine content under different light intensities were investigated. Artificial shading obtained by a nylon screen and natural shading produced by other trees were tested. Methylxanthines content was increased with the reduction of light, but only in the low light intensity treatment. A negative correlation was found between biomass accumulation and methylxanthines content. But the total methylxanthines yield per plant was not altered. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：75 / 80

页数：6

共 29 条

[1] Productivity of southern Brazilian coffee plantations shaded by different stockings of Grevillea robusta [J].