caa a22 4500 606219757 CHVBK 20210128101120.0 cr unu---uuuuu 210128e20150101xx s 000 0 eng 10.1007/s11104-014-2259-6 doi (NATIONALLICENCE)springer-10.1007/s11104-014-2259-6 Zeta potential at the root surfaces of rice characterized by streaming potential measurements [Elektronische Daten] [Zhong-yi Li, Yuan Liu, Yun-yun Zheng, Ren-kou Xu] Aim: Our objective was to determine the in situ zeta potential at the root surfaces of rice. Methods: A streaming potential apparatus made in our laboratory was used to measure zeta potential at the root surfaces. Results: Zeta potential at the root surfaces could be calculated from streaming potential measured by the apparatus, and the measurements of streaming potential had good stability, reproducibility and accuracy. Ionic strength, electrolyte type, pH influenced the zeta potentials, with being consistent with theoretical calculations. The absolute value of the zeta potential at the root surfaces decreased with increasing ionic strength due to compression of diffuse layer of the electric double layer. Cations had much greater impact on zeta potential than anions due to the electrostatic attraction of cations by the negatively charged root surfaces and electrostatic repulsion of anions. The effects of different cations on the zeta potential followed the order: Al3+ > H+ > Cu2+ > Mg2+ ≈ Ca2+ > K+ ≈ Na+. The zeta potential of root surfaces became more negative with increasing pH due to deprotonation of functional groups on roots. Conclusions: Streaming potential measurement is a novel method that can be used to calculate zeta potential of root surfaces. Springer International Publishing Switzerland, 2014 Rice root surfaces nationallicence Streaming potential nationallicence Zeta potential nationallicence Surface charge nationallicence Li Zhong-yi State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut Liu Yuan State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut Zheng Yun-yun State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut Xu Ren-kou State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 237-250 0032-079X 386:1-2<237 2015 386 11104 https://doi.org/10.1007/s11104-014-2259-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-014-2259-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Zhong-yi State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut NATIONALLICENCE 700 1- Liu Yuan State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut NATIONALLICENCE 700 1- Zheng Yun-yun State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut NATIONALLICENCE 700 1- Xu Ren-kou State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, P.O. Box 821, Nanjing, China aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 386/1-2(2015-01-01), 237-250 0032-079X 386:1-2<237 2015 386 11104