植物细胞外电势差信号对根系吸水过程的响应特征

植物细胞外电势差信号能够反映植物生理信息,通过插入黄杨树干和土壤金属电极,然后测定这种细胞外电势差,并借助小波变换方法,探究其对根系吸水过程的响应.结果表明:加水后必然产生动作电位信号,在土壤含水量相似的条件下,加水量越大,动作电位信号越强,而在加水量相当的条件下,土壤含水量越低,动作电位信号越强;树干-土壤之间的电势差在加水后波动幅度增加,并呈衰减趋势,当波动幅度衰减到几毫伏量级时,树干-土壤之间的电势差出现日变化规律,即在正午左右电势差出现极值.

Experimental study on the response of extracellular electric potential difference of plant during the water absorption of root

Previous studies have shown that extracellular electric potential difference signals could reveal the physiological information of plant.When the plant is stimulated by the change of environment,such as water absorption and temperature variation,electrical signals that could be obtained by the instruments will generate and transport by cells.In this study,metal electrodes are inserted into a boxtree trunk and the soil around the tree to capture the action potential(AP).Water irrigation is chosen as a stimul...