engleski

The Relationship between Endoparasitic Nematodes and Arbuscular Mycorrhizal Fungi in Soybean Cultivars

Endoparasitic nematodes (EPN) have detrimental effect on plant growth but also substantialy affect nutrient dynamics in ecosystem. Association of plants with arbuscular mycorrhizal fungi (AMF) increases plant access to immobile soil minerals, and therby increase plant growth rates. Mycorrhize influence the colonization of roots by other microorganisms and may reduce the susceptibility of roots to nematodes. SYince, there is direct competition for space, the mutual antagonism between EPN and AMF has been observed. The objectives were to determine the effect of soybean cultivars on EPN density in roots and root lenght colonization by AMF and their correlation. The cultivar effects and relationship between EPN and AMF colonization in soybean roots has been observed in roots of seven soybean culktivars, in randomized complete block design experiment. Significant differences were found between cultivars for the root infection by EPN and AMF colonization depending on the month of investigation. Relationship between the cultivars concerning interaction between EPN and AMF was found to be positive or negative depending on the cultivar and month. Three cultivars (OS-1-0, OS-2-I, and OS-3-I) had strong negative correlation while the strength of correlations of other cultivars were weak. Our results suggest that mutual inhibition between EPN and SMF in soybean roots existed depending on the cultivar and the plant genotype as such affects their relationship.

endoparasitic nematodes; mycorrhizal fungi; soybean

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