The vascular tissue passes through the pulvinus into the petiole proper . 维管组织经过叶枕进入叶柄。
2.
Potassium ions balance anions and organic acids , and are thus important in osmoregulation , the control of stomatal opening , and leaf movements ( through their effects on the turgor of pulvini ) 钾离子平衡阴离子和有机酸，因此在渗透调节、控制气孔的开闭以及叶运动（通过叶枕膨大的影响）中很重要。
