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. 2018 Dec 4;6:e6041. doi: 10.7717/peerj.6041

Table 1. Physicochemical properties of submerged P. crispus rhizosphere and non-rhizosphere sediment and interstitial water. Values are means (SD); n = 12.

Sample NO3 − N mg l−1 NH4+ − N mg l−1 pH Dop mm
R 0.30 ± 0.14b 10.61 ± 7.80a
N1 1.34 ± 1.61a,b 11.09 ± 8.30a 7.62 ± 0.14a 14.4 ± 6.6a
N2 1.46 ± 1.66a 12.38 ± 9.39a 7.59 ± 0.22a 12.3 ± 4.7a
N3 1.23 ± 1.26a,b 11.97 ± 8.74a 7.56 ± 0.23a 11.2 ± 5.2a
N4 0.79 ± 0.59a,b 13.28 ± 9.49a 7.60 ± 0.20a 10.6 ± 4.5a
N5 1.25 ± 1.65a,b 12.85 ± 8.84a 7.59 ± 0.20a 10.8 ± 4.5a
Non 0.39 ± 0.16b 10.90 ± 8.16a * *

Notes:

R and Non represent sediment samples in root compartment and non-rhizosphere compartment, respectively. N1–N5 represent sediment samples taken from one to five mm of near-rhizosphere sub-compartments.

– Indicates that the root system hindered microelectrode measurement in the root compartment.

Different letters after values in the same column indicate significant difference (P < 0.05).

*

Indicates that the non-rhizosphere was not measured.