叶枕 [
yè zhěn]
[植] pulvinus
phyllula
[植] sterigma
- 叶柄基部具鞘,先端有一膨大的叶枕;
petiole sheathing at base, apex with a swollen pulvinus; - 小枝无刺,经常早落,连续地从基部叶枕生出。
Branchlets unarmed, often caducous, produced successively from basal pulvinus. Leaves alternate; - 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。
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).