Author: A.A. Tanimola and B. Fawole
Publishing Date: 2015
Volume 33 Issue 1
Phytochemical and infrared analyses were carried out for eight Aloe species: Aloe schweinfurthii (ASF), Aloe succrotina (AST), Aloe vera (AVR), Aloe chinensis (ACS), Aloe arborescens (AAR), Aloe keayi (AKY), Aloe macrocarpa (AMC) and Aloe schweinfurthii x Aloe vera (ASV) that showed nematicidal activity in in vitro on Meloidogyne incognita. The phytochemical analyses revealed that the Aloe species had similar phytochemicals: tannins, saponins, flavonoids, cardenolides, phenols, alkaloids and anthraquinones. However, total phenol (14.3 mg/g), tannins (14.5 mg/g) and saponins (59.8 mg/g) were highest in AKY than in other aloes. Flavonoid content (3.7 mg/g) was highest in AAR while alkaloid content was highest in AST. The infrared analyses revealed that the Aloe species had similar functional groups; amines, hydroxyl, unsaturated aromatic compounds, ketone, aldehyde and phenol. The nematicidal potentials of these Aloe species might be due to the type and quantity presence in these phytochemicals. The presence of the nematicidal principles identified in Aloe species used in the management of M. incognita.
Keywords: Aloe species, phytochemicals, Meloidogyne incognita, infrared analysis, plant extracts