Lehrstuhl für Botanik, Technische Universität München, Arcisstraße 21, D-8000, München 2, Federal Republic of Germany.
Planta. 1979 Oct;147(1):21-6. doi: 10.1007/BF00384585.
The effect of temperature on water permeability of plant cuticles (astomatous Citrus leaf cuticles) has been investigated. The Arrhenius plot (logarithm of the permeability coefficient vs. 1/temperature) has two linear portions that intersect at 44° C. Evidence is presented to show that this intersection represents the solid/liquid phase transition of cuticular lipids. As the Arrhenius plot has only one phase transition in the temperature range of 5 to 80° C, it appears that all soluble cuticular lipids in the cuticle are present as a homogeneous mixture rather than as individual layers differing in composition. This view is supported by electron spin resonance evidence showing homogenous distribution of spin label fatty acids. The original distribution of soluble cuticular lipids is irreversibly altered by heating cuticular membranes above the transition temperature. This is accompanied by an irreversible increase in water peremeability, demonstrating the importance of the structure of cuticular lipids with regard to cuticular permeability.
已经研究了温度对植物角质层（无气孔柑橘叶角质层）透水性的影响。阿累尼乌斯图（渗透系数的对数与 1/温度）有两个线性部分，在 44°C 相交。有证据表明，这种交点代表角质层脂质的固/液相转变。由于阿累尼乌斯图在 5 到 80°C 的温度范围内只有一个相变，因此似乎角质层中所有可溶的角质层脂质都以均匀的混合物形式存在，而不是组成不同的单独层。这一观点得到了电子自旋共振证据的支持，该证据表明自旋标记脂肪酸的均匀分布。可溶性角质层脂质的原始分布通过将角质膜加热到相变温度以上而不可逆地改变。这伴随着水渗透率的不可逆增加，表明了角质层脂质结构对于角质层渗透性的重要性。
