. 2014 May 8;9(5):e95031. doi: 10.1371/journal.pone.0095031

Table 2. Concentrations of phenolic acids (µg·pot⁻¹) in root exudates from different treatments at the flowering stage as detected by HPLC.

Treatment		Ferulic acid	Gallic acid	P-coumaric acid	Cinnamic acid	Salicylic acid
	MS	-	6.53±1.59c	-	-	-
LP	MC	12.78±2.34b	29.08±0.80a	13.06±1.91b	20.98±2.51b	7.51±1.41a
	ISC	22.13±3.24a	14.72±2.84b	20.33±2.78a	25.11±2.52a	7.88±2.72a
	MS	-	11.12±2.88b	-	-	-
HP	MC	13.72±1.05a	13.09±1.58b	8.51±0.26a	14.41±2.86b	11.00±2.21a
	ISC	13.18±1.73a	21.65±2.99a	12.86±2.28a	20.59±2.78a	9.32±0.47a

Note: LP, 15 µM P; HP, 500 µM P. MS, soybean monoculture; MC, maize monoculture; ISC, maize/soybean intercropping. -, not detectable. All the data are the mean of four replicates ± SE. Data with the same letter represent no significant differences among the different cultivation modes at the same P level as determined by Duncan's multiple range test or a t-test (P<0.05).

Table 2. Concentrations of phenolic acids (µg·pot−1) in root exudates from different treatments at the flowering stage as detected by HPLC.

Table 2. Concentrations of phenolic acids (µg·pot⁻¹) in root exudates from different treatments at the flowering stage as detected by HPLC.