Department of Electronics, Faculty of Engineering, Kyushu University 36, Fukuoka 812, Japan.
Plant Physiol. 1992 Oct;100(2):614-9. doi: 10.1104/pp.100.2.614.
Stable electrochemical patterns appear spontaneously around roots of higher plants and are closely related to growth. An electric potential pattern accompanied by lateral root emergence was measured along the surface of the primary root of adzuki bean (Phaseolus angularis) over 21 h using a microelectrode manipulated by a newly developed apparatus. The electric potential became lower at the point where a lateral root emerged. This change preceded the emergence of the lateral root by about 10 h. A theory is presented for calculating two-dimensional patterns of electric potential and electric current density around the primary root (and a lateral root) using only data on the one-dimensional electric potential measured near the surface of the primary root. The development of the lateral root inside the primary root is associated with the influx of electric current of about 0.7 muA.cm(-2) at the surface.
稳定的电化学模式在高等植物的根部周围自发出现，并且与生长密切相关。使用新开发的设备操纵微电极，在 21 小时内沿小豆（菜豆）主根表面测量伴随侧根出现的电势模式。在侧根出现的地方，电势变得更低。这种变化比侧根出现早约 10 小时。提出了一种仅使用测量主根表面附近一维电势的数据来计算主根（和侧根）周围二维电势和电流密度模式的理论。侧根在主根内的发育与约 0.7 muA.cm(-2) 的表面电流流入有关。
