Carica papaya stem: A Promising Bioresource for Crop Protection

Adeniyi, A. I. and Iyinbor, A. A. and Owolabi, A. O. and Aremu, C. O. and Oluwole, S. O. and Oluyori, A. P. Carica papaya stem: A Promising Bioresource for Crop Protection. In: 1st KU8 Conference of Universities in Kwara State.

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Abstract

Some phytochemicals from agro-wastes have been established as natural candidates for crop protection. However, despite the medicinal and agricultural applications of Carica papaya, little is known about the active components of its stem. The phytochemical investigation of aqueous Carica papaya stem extract (ACPSE) revealed the presence of tannins, saponins, flavonoids, alkaloids, phenol, and steroids in varying proportions. The percentage saponins in ACPSE was 50.10% while 2.40%, 45mg/100g QE, and 4mg/100g GAE were obtained for alkaloids, flavonoids and total phenolics respectively. The components in the ACPSE and solvents fractions were identified using Gas Chromatography mass spectroscopic technique (GC-MS). The major active components identified through the GC-MS analysis of ACPSE and its fractions were 2, 6-di-ter-butyl-4-(dimethlaminomethyl) phenol (36.4 %), β-Sitosterol (21.60%), butanoic acid (21.17%) and 5-Eicosene (9.65 %). Moreover, in the agar-well diffusion experiment, ACPSE exhibited significant in vitro mycelia growth inhibition of 47.51– 69.96 % against Fusarium solani and Aspergillus fumigatus at 50 mg/ml concentration. Therefore, the presence of the identified phytochemicals indicates that Carica papaya stem is a promising source of antifungal phytochemicals which can find important application in food preservation and crop protection.

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