Evaluating Mechanisms of Soil Microbiome Suppression of Striga Infection in Sorghum
Taylor, Tamera | Daksa, Jiregna | Shimels, Mahdere Z. | Etalo, Desalegn W. | Thiombiano, Benjamin | Walmsey, Aimee | Chen, Alexander J. | Bouwmeester, Harro J. | Raaijmakers, Jos M. | Brady, Siobhan M. | Kawa, Dorota
The root parasitic weed Striga hermonthica has a devastating effect on sorghum and other cereal crops in Sub-Saharan Africa. Available Striga management strategies are rarely sufficient or not widely accessible or affordable. Identification of soil- or plant-associated microorganisms that interfere in the Striga infection cycle holds potential for development of complementary biological control measures. Such inoculants should be preferably based on microbes native to the regions of their application. We developed a method to assess microbiome-based soil suppressiveness to Striga with a minimal amount of field-collected soil. We previously used this method to identify the mechanisms of microbe-mediated suppression of Striga infection and to test individual microbial strains. Here, we present protocols to assess the functional potential of the soil microbiome and individual bacterial taxa that adversely affect Striga parasitism in sorghum via three major known suppression mechanisms. These methods can be further extended to other Striga hosts and other root parasitic weeds.
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