Botany Department (Biophysics), University of Queensland, 4067, Brisbane, Queensland, Australia.
Planta. 1974 Dec;115(4):285-96. doi: 10.1007/BF00388611.
Microelectrode and current clamping techniques have been used to investigate the electrical properties of the salt gland of Aegiceras corniculatum Blanco. Three regions of the gland corresponding to the cuticular cap, secretory cells, and the basal cell are distinguishable according to their resting potential and voltage response characteristics. The resting potentials of the secretory cells and basal cells are shown to be markedly negative with respect to the cuticular cap and the surface of the gland. Penetration of the base of the gland always results in a sharp drop in the resting potential. It is also shown that there exists a low resistance pathway from the cuticular region to the underside of the gland which shunts the secretory cells, and that the cuticular cap presents a high electrical resistance. The resting potential and voltage response at various positions in the gland were also measured with variation in leaf illumination. It is shown that the resting potential becomes less negative throughout the gland for the transition light to dark. A similar change in illumination generally produces a rise in voltage response.
微电极和电流钳技术已被用于研究桐花树（Aegiceras corniculatum Blanco）盐腺的电特性。根据静息电位和电压响应特性，可将盐腺分为三个区域：角质帽、分泌细胞和基细胞。分泌细胞和基细胞的静息电位相对于角质帽和腺体表面明显为负。渗透到腺体底部总是导致静息电位急剧下降。研究还表明，从角质区到腺体底部存在一条低电阻通路，该通路会使分泌细胞分流，并且角质帽呈现高电阻。还测量了叶片光照变化时腺体不同位置的静息电位和电压响应。结果表明，从明到暗的过渡过程中，整个腺体的静息电位变得不那么负。类似的光照变化通常会导致电压响应上升。
