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Is It Possible To Increase the Aloin Content of Aloe vera by the Use of Ultraviolet Light?
- Martínez-Romero, Domingo, Guillén, Fabián, Pérez-Aguilar, Henoc, Castillo, Salvador, Serrano, María, Zapata, Pedro J., Valero, Daniel
- Journal of agricultural and food chemistry 2013 v.61 no.9 pp. 2165-2170
- Aloe vera, Botrytis cinerea, Penicillium digitatum, chlorophyll, gels, latex, leaves, ultraviolet radiation
- In this paper, the effects of ultraviolet (UV) treatments on the aloin content of Aloe vera L. gel have been analyzed. UV-A treatment to A. vera plants for 36 days led to an increase in the aloin concentration in gel, rind tissue, and latex, while a decrease in chlorophylls a and b occurred in the photosynthetic tissue as a consequence of UV treatment. The growth of Penicillium digitatum and Botrytis cinerea (artificially inoculated on the leaf surface) was drastically decreased in UV-A-treated leaves, which could be attributed to the increase in the aloin concentration by the UV-A treatment. In addition, UV-C treatment to detached leaves also led to an increase in the gel aloin concentration, at higher levels than occurred with UV-A treatment, although leaves showed severe lesions after 48 h of treatment.