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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2016, Volume : 4, Issue : 3
First page : (64) Last page : (72)
Article doi: http://dx.doi.org/10.18782/2320-7051.2307

Influence of Some Plant Extracts on Physiological Traits of French Beans (Phaseolus vulgaris L.) Infected with Rust (Uromyces appendiculatus)

Menge Dominic1*, Makobe M1., Monda E.O2. and Okemo .P.O2
1Department of Biological Science, Maasai mara University, P.O Box 861-20500, Nairok
2Department of Plant and Microbial Sciences, School of Pure and Applied Sciences, Kenyatta University, Nairobi Kenya
*Corresponding Author E-mail: dominicmenge@yahoo.co.uk
Received: 7.06.2016  |  Revised: 15.06.2016   |  Accepted: 18.06.2016  

Plant growth analysis is a standard approach to study plant growth and productivity. The following plants Boscia angustifolia, Zanthoxylum chalybeum and Melea volkensii were selected based on their antifungal activities on rust from previous experiments. The extracts were used as single treatments and combined with each other namely; Z. chalybeum- M. volkensii, B. angustifolia - Z. chalybeum and B. angustifolia - M. volkensii making a total of eight treatments including a negative and positive controls. Soil analysis of study site was conducted. Plant growth parameters that include plant shoot height and dry shoot weight were used to assess the effects of various treatments on bean plant performance. Ten plants sampled in each of the four plots in a treatment were uprooted and sampled leaves plucked and area measured. In this study the plots where the French beans were grown had nitrogen and phosphorous deficiency. Phosphorus was in low levels (5.4mgkg-1) which was appropriate for French beans hence it was necessary to supply fertilizer of right amounts to supplement the deficiency. Commercial fungicide (Kocide DF) treatment did not affect the leaf area but Z. chalybeum treatment had the lowest mean leaf area throughout the growth period. This may suggest that the commercial fungicide can be tolerated by the plants. Z. chalybeum treatment may have had some secondary metabolites that could have been harmful to the bean plants. B. angustifolia –Z. chalybeum, M. volkensii and Kocide DF treatments had highest mean dry shoot weights throughout the growth period meaning they were friendly to the physiological processes. Untreated control and Z. chalybeum had lower mean dry shoot weights; this could be because of the higher disease severity and incidence. Commercial fungicide, untreated control and Z. chalybeum treatments had lower mean shoot heights compared to other treatments. This indicated that apart from rust disease causing low shoot height in untreated control, Kocide DF and Z. chalybeum treatments could have initiated production of compounds that deterred increase in shoot height.

Keywords: antifungal; dry shoot weight; shoot height; leaf area

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Dominic, M., Makobe, M., Monda, E.O. and Okemo, P.O., Influence of Some Plant Extracts on Physiological Traits of French Beans (Phaseolus vulgaris L.) Infected with Rust (Uromyces appendiculatus), Int. J. Pure App. Biosci.4(3): 64-72 (2016). doi: http://dx.doi.org/10.18782/2320-7051.2307