Identification and quantitative composition of nematicidal ingredients in leaves of some Aloe species
Identification and quantitative composition of nematicidal ingredients in leaves of some Aloe species
A.A. Tanimola† and B. Fawole1
ABSTRACT
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.
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June 2015
Pakistan Journal of Nematology, Vol. 33, Iss. 1, Pages 1-114
