ISHS Acta Horticulturae 769: XXVII International Horticultural Congress - IHC2006: International Symposium on Asian Plants with Unique Horticultural Potential
FATTY ACIDS IN LEAVES OF MAGNOLIACEAE |
| Authors: | Liqun Huang, Hanzhou Sun, Lixin He, Zhihui Li, Mohua Yang |
| Keywords: | Magnoliaceae species, fatty acid, gas chromatography, cold hardiness |
| Abstract:
Magnoliaceae species are dominant ornamental plants in our daily landscape. But, cold temperatures limit their introduction and cultivated distribution. This study addressed fatty acid compositions and seasonal variations in leaves of Magnolia species, which would ultimately provide guidance for further Magnolia introductions. The results indicated that majority of fatty acids in leaves of Magnoliaceae were palmitic acid (C16:0), palmitoleic acid (C16:1), stertic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), and eleosetearic acid (C18:3). The saturated acid was represented by palmitic acid, while unsaturated acids were dominated by linoleic and eleosetearic acids. All plants of Magnoliaceae shared similar types of fatty acids. However, the quantity of each acid was significantly different, especially unsaturated acids. The ratio of saturated and unsaturated acids was also statistically difference. Low temperatures significantly increased the allocation of unsaturated acids. Under the different temperatures, the ration of saturated and unsaturated fatty acids, also IUFA values, could be expressed as Y = b0 + b1x + b2x2 + b3x3. Variation of fatty acids in all Magnoliaceae plants had the similar trend under the different seasons of the year. Obviously, fatty acids in the plants could be used to indicate the plant cold hardiness. Further studies should be carried out for investigating detailed relationships between fatty acids and plant cold hardiness. | |
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