The efficiency of mycorrhizal inoculation (Glomus macrocarpum on effectiveness of BCMV R. solani infection. was studied in bean plants (Phaseoius vulgaris L.). Results showed that R. solani when introduced alone in sterilized soil caused the highest percentage of post-emergence damping-off and root-rot diseases and the treatments using mycorrhizal or BCMV inoculation decreased the percentage of fungal diseases while, the lowest percentage of fungal infection resulted from the combination of VAM fungus and viral inoculation. The highest percentage of viral infection occurred with V AM fungus inoculation while, R. solani decreased the percentage of viral infection. Moreover, the lowest percentage of viral infected plants occurred with the combination of R. solani and VAM fungus m sterilized soil. Slight reduction in colonization intensity and spore production of VAM fungus ware occurred with viral infection regardless the type of soil. While,the highest reduction was approved with fungal inoculation. Total bacterial counts in the rhizosphere soil were higher in case of inoculation with VAM and BCMV combination at all growth periods VAM fungus when inoculated alone are combined with BCMV increased the counts of Actinomycetes at all growth periods of bean plants. On the contrary, viral and mycorrhizal inoculation decreased the counts of fungi in soil specially in the combination of VAM fungus and BCMV treatment which led to sharp decrease in population of fungi.
VAM fungus treatments gave highly increase in plant height, number of leaves/plant, fresh and dry weights of roots and shoots and No. of flowers/plant when inoculated alone as well as when associated either with R. solani regardless the type of soil. However, all growth characters were decreased in case of viral or fingal infection in sterilized and .The efficiency of mycorrhizal inoculation (Glomus macrocarpum on effectiveness of BCMV ,R. solani was studied in bean plants (Phaseoius vulgaris L.). Results showed that R. solani when introduced alone in sterilized soil caused the highest percentage of post-emergence damping-off and root-rot diseases and the treatments using mycorrhizal or BCMV inoculation decreased the percentage of fungal diseases while, the lowest percentage of fungal infection resulted from the combination of VAM fungus and viral inoculation. The highest percentage of viral infection occurred with V AM fungus inoculation while, R. solani decreased the percentage of viral infection. Moreover, the lowest percentage of viral infected plants occurred with the combination of R. solani and VAM fungus m sterilized soil. Slight reduction in colonization intensity and spore production of VAM fungus ware occurred with viral infection regardless the type of soil. While, the highest reduction was approved with fungal inoculation. Total bacterial counts in the rhizosphere soil were higher in case of inoculation with VAM and BCMV combination at all growth periods VAM fungus when inoculated alone are combined with BCMV increased the counts of Actinomycetes at all growth periods of bean plants. On the contrary, viral and mycorrhizal inoculation decreased the counts of fungi in soil specially in the combination of VAM fungus and BCMV treatment which led to sharp decrease in population of fungi.
VAM fungus treatments gave highly increase in plant height, number of leaves/plant, fresh and dry weights of roots and shoots and Mo. of flowers/plant when inoculated alone as well as when associated either with R. solani regardless the type of soil. However, all growth characters were decreased in case of viral or fungal infection in sterilized and non- sterilized soils.
Also, obtained results indicated that total carbohydrates, protein content, nitrogen, phosphorus and potassium were increased with VAM fungus treatments. Chlorophyll A was almostly proportionated with carbohydrates except in case of BCMV. The VAM fungus gave the highest level of chlorophyll B while, chlorophyll C increased with all treatments except in plants inoculated with BCMV and VAM fungus in non-sterilized soil.- sterilized soils.
Also, obtained results indicated that total carbohydrates, protein content, nitrogen, phosphorus and potassium were increased with VAM fungus treatments. Chlorophyll A was almostly proportionated with carbohydrates except in case of BCMV. The VAM fungus gave the highest level of chlorophyll B while, chlorophyll C increased with all treatments except in plants inoculated with BCMV and VAM fungus in non-sterilized soil. |
