Fig. 2From: The effect of root pruning on the arbuscular mycorrhizal symbiosis in grapevine rootstocksPercent colonization of vine roots collected from the ‘old’ and ‘young’ roots of 48 rootstocks. The quantity of all three structures differed between zones (total, p = 0.004; vesicles, p < 0.001; arbuscules, p = 0.004)Back to article page