Fig. 4From: Changes in growth and soil microbial communities in reciprocal grafting clones between Populus deltoides males and females exposed to water deficit conditionsSoil microbial phospholipid fatty acids (PLFAs) at soil depths of 0–15 cm beneath four graft clones under well-watered and water deficit. Values of different letters represent significant differences (P < 0.05) in different graft clones. Error bars SE (n = 3 plots). F/B Ratio of fungal to bacterial PLFAs, G+ total gram-positive bacteria PLFAs, G− total gram-negative bacteria PLFAsBack to article page