van Wyk B E, van Rheede van Oudtshoorn M C, Smith G F
Department of Botany, Rand Afrikaans University, Johannesburg, South Africa.
Planta Med. 1995 Jun;61(3):250-3. doi: 10.1055/s-2006-958066.
Geographical variation in fresh Aloe ferox leaf exudate of which the dried product is commercially known as Cape Aloes, was investigated throughout the natural distribution range of the species. The composition of the major compounds is remarkably invariable, with aloeresin A, aloesin, and aloin (both epimers A and B) contributing between 70% and 97% of total dry weight, in a ratio of approximately 4:3:2, respectively. Minor compounds are less evenly distributed, with aloinoside A and aloinoside B more frequent in the western parts of the distribution area and aloeresin C and 5-hydroxyaloin A generally present in small quantities throughout the distribution area. The aloin content of the exudate is clearly related to provenance but there are no distinct geographical discontinuities. The selection of high-yielding provenances, with total aloin levels above 25%, is recommended for commercial cultivation.
在该物种的整个自然分布范围内，对新鲜的好望角芦荟叶渗出物（其干燥产品在商业上称为开普芦荟）的地理变异进行了研究。主要化合物的组成非常稳定，芦荟树脂A、芦荟素和芦荟苷（A和B两种差向异构体）分别占总干重的70%至97%，比例约为4:3:2。次要化合物分布不太均匀，芦荟苷A和芦荟苷B在分布区域西部更为常见，而芦荟树脂C和5-羟基芦荟苷A在整个分布区域中通常含量较少。渗出物中芦荟苷的含量显然与产地有关，但没有明显的地理间断。建议选择总芦荟苷含量高于25%的高产产地进行商业种植。
