Effects of Arbuscular Mycorrhizal Fungal Inoculation on Growth and Yield of Two Sweet Potato Varieties

Main Article Content

Michael Ajanja Sakha
Joyce Jefwa
Joseph P. Gweyi-Onyango


Arbuscular mycorrhizal fungi (AMF) represent a functionally important component of soil microbial community, being of particular significance for plant mineral nutrition in tropical agro ecosystems. The effects of AMF inoculation on growth and yield of two sweet potato varieties was studied during the short rains season of 2017/2018 in the Teaching and Research Farm of Agricultural Science and Technology Department, Kenyatta University. The experiment was laid down as 2x2 factorial design in a randomized complete block design (RCBD) with three replications. The experimental factors were two sweet potato varieties (Kemb-10 and Bungoma) and AMF inoculum (With and without inoculation). Data on growth parameters was collected on vine length and number of branches, while data on yield was collected on marketable storage roots and shoot biomass. Data was analyzed using Genstat 15th edition and the results showed that there was significantly difference at P≤0.05 among the treatments. AMF inoculation increased growth and yield of sweet potatoes by vine length 29.74%, Number of branches 22.36%, marketable storage roots 18.32%, and shoot biomass 28.68% in week 20. Also, variety interacting with AMF inoculation enhanced growth and yield parameters. In conclusion, the study demonstrated that the application of commercial AMF inoculum solely or when interacting with varieties enhanced growth and yield of sweet potatoes, though there was no significant difference between the two varieties.

Arbuscular mycorrhiza fungi, inoculation, interactions, growth, yields

Article Details

How to Cite
Sakha, M., Jefwa, J., & Gweyi-Onyango, J. P. (2019). Effects of Arbuscular Mycorrhizal Fungal Inoculation on Growth and Yield of Two Sweet Potato Varieties. Journal of Agriculture and Ecology Research International, 18(3), 1-8. https://doi.org/10.9734/jaeri/2019/v18i330063
Original Research Article


Crissman C, Anderson P, Fuglie K, Kapinga R, Lemaga B, Devaux A, Bussink C. Trends in the potato and sweet potato sectors in sub‐Saharan Africa and their contribution to the Millennium Development Goals In Kapinga R. E., editor; , Kingamkono R., editor; , Msabaha M., editor; , Ndunguru J., editor; , Lemaga B., editor; and Tusiime G., editor. (Eds.), Tropical root and tuber crops: Opportunities for poverty alleviation and sustainable livelihoods in developing countries: Proceedings of the thirteenth triennial symposium of the international society for tropical root crops (iSTRC). Arusha, Tanzania: International Society for Tropical Root Crops. 2007;9–19.

Bovell-Benjamin AC. Sweet potato utilization in human health, industry and animal feed systems In: Ray, R.C. and Tomlins, K.L. (Eds.) Sweet potato: Post Harvest Aspects in Food, Feed, and Industry. Nova Science Publishers, New York. 2010;193–224.

International Potato Center. Sweet potato Facts and Figures.

Available:https://cipotato.org/crops/sweetpotato/sweetpotato-facts-and-figures/ [Accessed March 27, 2018]

Nedunchezhiyan M, Ray RC. Sweet potato growth, development, production and utilization: Overview. In R. C. Ray, and K. I. Tomlins (Eds.), Sweet potato: Post harvest aspects in food. New York: Nova Science Publishers Inc. 2010;2–26.

Sowley E, Neindow M, Abubakari A. Effect of poultry manure and NPK on yield and storability of orange-and white- fleshed sweet potato [Ipomoea batatas (L.) Lam]. ISABB Journal of Food and Agricultural Sciences. 2015;5(1):1–6.

Ali M, Costa D, Abedin M, Sayed M, Basak N. Effect of fertilizer and variety on the yield of sweet potato. Bangladesh Journal of Agricultural Research. 2009;34(3):473–480.

Gibberson DI, Joshua OS, Ato BP, Justice O, Paul AA. The effect of deficit irrigation and manure on soil properties, growth and yield of orange fleshed sweet potato [Ipomea batatas Lam]. Scholars Journal of Agriculture and Veterinary Sciences. 2016; 3(7):463–473. Available:https://doi.org/10.21276/sjavs.2016.3.7.4

Schu¨bler A, Schwarzott D, Walker C. A new fungal phylum, the glomeromycota: Phylogeny and evolution. Mycol Res. 2001;105:1413–1421.

Tahat MM, Sijam K. Mycorrhizal fungi and abiotic environmental conditions relationship. Res. J. Environ. Sci. 2012;6: 125-133.

Barea JM, Jeffries P. Arbuscular mycorrhizas in sustainable soil plant systems. In: B. Hock and A. Varma (eds) Mycorrhiza, structure, Function, Molecular Biology and biotechnology. Springer-Verlag, Heidelberg. 1995;521-559.

Moose B. The influence of soil type and endogone strain on the growth of mycorrhizal plants in phosphate deficient soil. Rev. Ecol. Sol.1972;9:529.

Smith SE, Read DJ. Mycorrhizal symbiosis. 2nd Edn. London: Academic Press; 2007.

Schnepf A, Leitner D, Klepsch S, Pellerin S, Mollier A. Modelling phosphorus dynamics in the soil-plant system. In Phosphorus in Action: Biological Processes in Soil Phosphorus Cycling, Eds E. K. Bünemann, A. Obserson, and E. Frossard (Heidelberg: Springer). 2011; 113–133.

Howlever RH, Asher CJ, Edwards DG. Establishment of an effective mycorrhizal association on cassava in flowing solution culture and its effects on phosphorus nutrition. New Phytol. 1981;90:279–283.

Rigou L, Mignard E. Factors of acidification of the rhizosphere of mycorrhizal plants. Measurement of pCO2 in the rhizosphere. Acta Bot. Gall. 1994;141:533–539.

Bago B, Azcon-Aguilar C. Changes in the rhizospheric pH induced by arbuscular mycorrhiza formation in onion (Allium cepa L). Z. Pflanz. Bodenkunde. 1997;160:333–339.

Boldt K, Pors Y, Haupt B, Bitterlich M, Kuhn C, Grimm B, et al. Photochemical processes, carbon assimilation and RNA accumulation of sucrose transporter genes in tomato arbuscular mycorrhiza. J. Plant Physiol. 2011;168:1256–1263.

DOI: 10.1016/j.jplph.2011.01.026

Roy-Bolduc A, Hijri M. The use of mycorrhizae to enhance phosphorus uptake: A way out the phosphorus crisis. J. Biofertil. Biopestici. 2011;2:104.

FAO/UNESCO. FAO-UNESCO soil map of the world. Africa, UNESCO, Paris. 1974;4: 307-308.

Mwololo JK, Mburu MWK, Muturi PW. Performance of sweet potato varieties across environments in Kenya. International Journal of Agronomy and Agricultural Research. 2012;2(10):1-11.

Yen DE. The sweet potato and Oceania; An essay in Ethno botany. Honolulu, Hawaii; Bishop Museum Press; 1974.

Samanhudi A, Yunus B, Pujiasmanto M, Rahayu. Application of organic manure and mycorrhizal for improving plant growth and yield of Temulawak (Curcuma xanthorrhiza Roxb.). Sci. Res. J. 2014; 2(5):2201-2796.

Jarande NN, Mankar PS, Khawale VS, Kanase AA, Mendhe JT. Response of chickpea (Cicer arietinum L.) to different levels of phosphorus through inorganic and organic sources. J. Soils and Crops. 2006; 16(1):240-243.

Cekic FO, Unyayar S, Ortas I. Effects of arbuscular mycorrhizal inoculation on biochemical parameters in Capsicum annuum grown under long term salt stress. Turk J .Bot. 2012;36:63-72.

Purekar PN, Singh RR, Deshmukh RD. Plant Physiology and Ecology. 2nd Ed. Chand, S. and Company, New Delhi, India; 1992.

Mcharo M, Carey EE, Gichuki ST. Performance of selected sweet potato varieties in Kenya. Afr. Crop Sci. 2001;9: 49-59.

Vorasoot N, Songsri P, Akkasaeng C, Jogloy S, Patanothais A. Effect of water stress on yield and agronomic characters of peanut. Journal of Science Technology. 2003;25:283-288.

Novak, Bruno, Ivanka Žutić, Nina Toth, Nadica Dobričević. Sweet potato [Ipomoea batatas (L.) Lam] yield influenced by seedlings and mulching. Agriculturae Conspectus Scientificus. 2007;72(4):357-359.

Douds Jr. DD, Joseph Lee, Shenk JE, Ganser S. Inoculation of sweet potatoes with AM fungi produced on-farm increases yield in high P soil. Journal of Applied Horticulture. 2015;17(3):171-175.

Ryan NA, Deliopoulos T, Jones P, Haydock PPJ. Effects of mixed-isolate illycoiThizal inoculum on potato-potato cyst nematode interaction. Annals of Applied Botwti. 2003;143:111-119.

Fitriatin BN, Yuniarti A, Turmuktini T, Ruswandi TK. The effect of phosphate solubilizing microbe producing growth regulators on soil phosphate, growth and yield of maize and fertilizer efficiency on Ultisol. Eurasian Journal of Soil Science. 2014;3(2):101–107.

Mukhongo, Ruth W, John B. Tumuhairwe, Peter Ebanyat, AbdelAziz H. AbdelGadir, Moses Thuita, Cargele Masso. Combined application of biofertilizers and inorganic nutrients improves sweet potato yields. Frontiers in Plant Science. 2017;8:219.