@article {Hollandajev.2017.17090, author = {Taylor C. Holland and Miranda M. Hart and Carl Bogdanoff and Pat Bowen}, title = {Response of Grapevine Rootstocks to Soil Inocula from Different Sources}, elocation-id = {ajev.2017.17090}, year = {2017}, doi = {10.5344/ajev.2017.17090}, publisher = {American Journal of Enology and Viticulture}, abstract = {Although arbuscular mycorrhizal (AM) fungi inoculants are widely used as bioinoculants in plant nurseries it is not clear whether this practice is beneficial for grapevine rootstocks. A greenhouse study was conducted to compare the effects of locally sourced soil microbial inocula with two commercial mycorrhizal inocula on root colonization and early growth and physiology of grapevine rootstocks Riparia Gloire, 101-14 Mgt and SO4. Mycorrhizal colonization ranged widely among incocula with the highest rate from one commercial inoculum followed by a locally collected inoculum composed of native-plant root fragments, and poor or no colonization by the other two inocula. Colonization affected SO4 vine characteristics especially leaf greenness, which increased in response to a commercial and a locally sourced inocula. Greater growth (root biomass, shoot biomass and shoot length) was observed in Riparia Gloire and 101-14 Mgt vines inoculated with locally sourced compared to commercial inocula. The inconsistency of effects among rootstocks and inocula tested illustrates the unpredictability of this symbiosis and unreliability of using a mycorrhizal inoculum to enhance growth of young plants.}, issn = {0002-9254}, URL = {https://www.ajevonline.org/content/early/2017/10/25/ajev.2017.17090}, eprint = {https://www.ajevonline.org/content/early/2017/10/25/ajev.2017.17090.full.pdf}, journal = {American Journal of Enology and Viticulture} }