Comparative Studies on the Susceptibility of Three Tubers of Dioscorea Species to Dry Rot in Anyigba, Kogi State

Adegboyega Adeniji; Apovughaye Taiga; M S Ayodele

doi:10.21467/ias.8.1.70-74

Authors

Adegboyega Adeniji Department of Biological Sciences, Faculty of Natural Sciences, Kogi State University
Apovughaye Taiga Kogi State University, Anyigba
M S Ayodele Faculty of Natural Sciences, Kogi State University

DOI:

https://doi.org/10.21467/ias.8.1.70-74

Abstract

Various yam species are cultivated but white yam (Dioscorea rotundata Poir.), water yam (Dioscorea alata L.) and yellow yam (Dioscorea cayenensis Lam.) are among the most cultivated in Nigeria. The Susceptibility of three tubers of Dioscorea species (D. rotundata, D. alata and D. cayenensis) to dry rot pathogens was investigated. Isolation was made from rotted tuber tissues, followed by pathogenicity test and identification of isolates; two fungal species Aspergillus niger and Rhizopus stolonifer were isolated and identified as the major fungi causing yam tuber dry rot in the study area. There was significant difference (P<0.05) in the susceptibility of the various Dioscorea tuber species studied to rot caused by Aspergillus niger [D. rotundata (20mm), D. alata (11mm) and D. cayenensis (3.5mm)] and Rhizopus stolonifer [ D. rotundata (17.5mm), D. alata (10mm) and D. cayenensis (2mm)]. The phytochemical contents of the three tubers of Dioscorea species examined also varied significantly, with the bioactive substances of D. cayenensis and D. alata relatively higher when compared to D. rotundata. Therefore, this research reveals that three metabolites; Saponin, Flavonoid and Tanin constitute the major trait for resistant ability of D. cayanesis and D. alata to dry rot causing pathogen. Therefore, it is necessary that the differences in susceptibility be considered when developing yam barns. Also, researchers should work on genetically improving the susceptible white yam (D. rotundata) which is commonly eaten by millions of Nigerians with a possibility of increasing the quantities of the deficient phytochemicals.

Keywords:

Dioscorea alata, Dioscorea cayanensis, Dioscorea rotundata, , dry rot, Susceptibility, phytochemical.

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References

W, Abukari, K. A. B. Judith, A. A. Mamudu, “Absence of Effects of Herbicides Use on Yam Rots: A Case Study in Wulensi, Ghana and Pieter Spanoghe.” Journal of Agriculture 9, 95, 2019.

T. C. Okpogba, A. A. Sobowale and I. T. Gbadamosi, “Control of some Penicillium and Aspergillus rots of Discorea alata Poir and Discorea rotundata L. using extracts of Xylopia aethiopica (Dunal.) Linn. and Syzygium aromaticum (Linn.) Merr.” African Journal of Plant Science. Vol. 13(5), pp. 113-124, 2019.

O. K., Akinbo, E. U., Opara, and A. I., Ikoro, “Isolation and Characterization of Soft Rot pathogen of Yam (Dioscorea spp) in Nigeria-A Review” Journal of Agriculture and Sustainability. Volume 9, Number 2, 2016, 198-209.

VI, Gwa, E. J. Ekefan, and A. O. Nwankiti, "Antifungal Potency of Some Plant Extracts in the Control of White Yam (Dioscorea rotundata poir) Tuber Rot." Adv Biotech & Micro, Volume 7 Issue 1 October 2017.

V. I. Gwa, and E. J. Ekefan, "Fungal Organisms Isolated from Rotted White Yam (Dioscorea rotundata) Tubers and Antagonistic Potential of Trichoderma harzianum against Colletotrichumspecies."Agricultural Res & Tech:10.3, 2017.

C. O. Eleazu, S. Kolawole, and E. Awa, “Phytochemical Composition and Antifungal Actions of Aqueous and Ethanolic Extracts of the Peels of two Yam Varieties.” Med Aromat Plants 2: 128, 2013.

V. I Gwa, and I. B. Richard, “Susceptibility of White Yam (Dioscorea rotundata Poir) Tuber to Rot Fungi and Control with Extracts of Zingiber officinale Rosc. Azadirachta indica A. Juss. and Piper guineense Schumach.” J Plant Pathol Microbiol 9: 452, 2018.

A. N. Kanu, C. V. Ezeocha and N. P. Ogunka, “A Review on Bioactive Compounds of Yam Varieties for Human Disease Management.” Asian Food Science Journal, 1-10 1(4): 2018.

E, Okoroafor, and S, Iborida, “Phytochemical Screening and Nutritional Quality of Yam Species Susceptible and Resistant to Damage by Yam Beetle, Heteroligus meles Bilb (Coleoptera:Dynastinae)” Journal of Biotechnology and Biochemistry (IOSR-JBB) ISSN: 2455-264X, Volume 3, Issue 4 (Jul. – Aug. 2017), PP 68-72.

A. K Patrice, K. S. Y. K. Francis, A. S. Théophile, F. Fatoumata, and H. A. Diallo “Effects of three aqueous plant extracts in the control of fungi associated with post-harvest rot of yam (Dioscorea alata)” international Journal of Agronomy and Agricultural Research. Vol. 11, No 3, P. 77-87, 2017.

V. I. Gwa, and A. O. Nwankiti, "In vitro antagonistic potential of Trichoderma harzianum for biological control of Fusarium moniliforme isolated from Dioscorea rotundata tubers." Virol mycol 6.2 (2017): 2-8.

Frank, C. Ogbo, and C. A. Kingsley, "Roles of Fungal Rots in Post-Harvest Storage Losses in some Nigerian varieties of Dioscorea species." British Microbiology Research Journal, 4.3 (2014): 343-350.

Okwu, D. E., and C. U. Ndu. "Evaluation of the phytonutrients, mineral and vitamin contents of some varieties of yam (Dioscorea sp.)." International Journal of Molecular Medicine and Advance Science 2.2 (2006): 199-203.

T. Apovughaye, "Differential rate of dry rot in Dioscorea rotundata (white yam) along the tuber length due to rot causing fungi." Advances in Microbiology 2.04 (2012): 452.

N. T. Robort, T. W. Mark, and S.W. Alan, “Plant pathology concepts and Laboratory Exercises” CRC press. 2004, Pp396.

A. E. Arinze, "The occurrence of antifungal activity in yam tissue in response to microbial deterioration." Nige J Plant Protect 12 (1998): 9-14.