膜脂中不饱和脂肪酸的含量:决定膜相变温度 不饱和脂肪酸含量越高,引起膜相变的温度越低。 含不饱和脂肪酸越多的物种和品种,抗冷性越强 例:粳稻〉籼稻 >)Ratio of unsaturated and saturated fatty acids of membrane lipids of mitochondria isolated from chiling-sensitive and chiling- resistant tissues )Chilling-sensitive tissues: 》Bean shoot 2.8 > Sweet potato tuber 17 》 Maize shoot 2.1 》 Tomato green fruit 2.8 )Chilling-resistant tissues > Cauliflower buds 3.2 > Turnip root 3.9 》Pea shoot 3.8膜脂中不饱和脂肪酸的含量：决定膜相变温度 • 不饱和脂肪酸含量越高，引起膜相变的温度越低。 • 含不饱和脂肪酸越多的物种和品种，抗冷性越强。 例：粳稻 > 籼稻 »Ratio of unsaturated and saturated fatty acids of membrane lipids of mitochondria isolated from chilling-sensitive and chilling￾resistant tissues »Chilling-sensitive tissues: » Bean shoot 2.8 » Sweet potato tuber 1.7 » Maize shoot 2.1 » Tomato green fruit 2.8 »Chilling-resistant tissues: » Cauliflower buds 3.2 » Turnip root 3.9 » Pea shoot 3.8