N小水滴的歌振 蜡质小秆 s蜡质很盖 cuticle 角质 。。。角质(cuir s2半角质( hemicutin 这初生 0D/果胶 (pectin Cea∥A蜡质(wax 次生壁 细胞膜 cell membrane 细胞质 symplasm 外质连丝 ectoesmata
叶表皮细胞外壁的示意图 角质（cutin) 半角质(hemicutin) 果胶(pectin) 蜡质(wax) 角质 角质层 初生壁 次生壁 质膜 细胞质symplasm 蜡质覆盖 带除垢剂 小水滴 的小水滴 蜡质小秆 外质连丝 外质连丝 cuticle Cell wall 细胞膜cell membrane ectoesmata
Uptake of mineral nutrients by the leaves Waxes represents the water proofing component of the cuticle. Due to their hydrophobic nature waxes impede the diffusion of hydrophilic ions. So the leaves are not constructed for the uptake of hydrophilic ions dissolved in water. Nevertheless uptake of aqueous plant nutrients at least in small quantities
Waxes represents the water proofing component of the cuticle. Due to their hydrophobic nature waxes impede the diffusion of hydrophilic ions. So the leaves are not constructed for the uptake of hydrophilic ions dissolved in water. Nevertheless uptake of aqueous plant nutrients at least in small quantities. Uptake of mineral nutrients by the leaves