| 摘要: |
| 用差示扫描量热法分析了6种作物幼苗线粒体极性脂和磷脂酰甘油（PG）的热致相变。结果发现，抗冷性作物小麦发生相变的温度比其他冷敏感作物的低得多；小麦和花生线粒体PG混合后，显著改变了各自的相变温度。线粒体PG脂肪酸组成分析表明，脂肪酸饱和度决定其相变温度。线粒体PG的脂肪酸饱和度与作物幼苗的冷敏感性相关。 |
| 关键词: 线粒体 磷脂酰甘油 相变 脂肪酸 |
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| 基金项目:浙江省自然科学基金资助项目(398025) |
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| Phosphatidylglycerols from mitochondria and chilling sensitivity in crop seedlings |
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| Abstract: |
| The thermal response of seedling mitochondria polar lipids and phosphatidylglycerols (PG) from 6 species of crops was investigated by differential scanning calorimetry.The phase transition from wheat,a chilling resistant crop,occurred at a much lower temperature than that from the other chilling sensitive crops.The transition temperature of wheat and peanut PG was significantly altered by mixed with each other.Analysis of the fatty acid composition of PG in mitochondria showed that the level of saturated fatty acid (the sum of palmitate and stearate) determined the phase transition temperature.These results suggest that the level of saturated fatty acid of PG in mitochondria be correlated with the chilling sensitivity of crop seedlings. |
| Key words: mitochondria phosphatidylglycerols phase transition fatty acid |
