アズキ幼胚上の電位分布について

抄録

1. Determination was carried out for distribution of electric potential on the surface of a typical hypogeal embryo, Phaseolus angularis, and distribution curves of the potential were obtained for various stages of germination up to 6 days after sowing.
2. A valley of potential curve appears in the elongating region of epicotyl of 2-to 6-day-old embryo, and the hypothesis for the epigeal plant given in the former paper2), viz. the hypothesis that distribution of elongation velocity along the elongation axis coincides with distribution of second spatial derivative of the potential with respect to the elongation axis, seems to be applicable to the epicotyl of Phaseolus angularis.
3. Cotyledon has a higher potential level than the elongating part of epicotyl and the potential gradient between cotyledon and epicotyl is steep in the earlier stages of germination, gradually decreasing in later stages.