In: Molecular Microbial Ecology of the Rhizosphere. FJ de Bruijn, editor. Springer-Verlag, Berlin, Heidelberg. Book chapter accepted Understanding root-microbiome interactions 1 Gaston Zolla 1 , Matthew G Bakker 1 , , Dayakar V Badri 1 , Jacqueline 2 M Chaparro 1 ,Amy M Sheflin 1 , Daniel K Manter 2 and Jorge Vivanco 1* 3 4 1 Center for Rhizosphere Biology, Colorado State University, Fort 5 Collins, CO 80523, USA 6 7 2 USDA-ARS, Soil-Plant-Nutrient Research Unit, Fort Collins, CO 8 80526, USA 9 10 Number of words including references: 11 12 Number of tables: 1 13 14 Number of figures: 4 15 16 *Corresponding author: 17 Jorge Vivanco 18 Phone: 1(970)491-7170 19 Fax: 1(970)491-7745 20 j.vivanco@colostate.edu 21 22 23 Running title: Understanding root-microbiome interactions 24 25 Key words: microbiome, root exudates, abiotic stress, biotic stress, root exudates collection, root 26 exudates profiling 27 28 29