摘要
分析了杜鹃两个不同抗寒性的栽培品种毛白杜鹃（ＲｈｏｄｏｄｅｎｄｒｏｎｍｕｃｒｏｎａｔｕｍＧ．Ｄｏｎ）和西洋杜鹃（Ｒ．ｈｙｂｒｉｄｕｍＨｏｒｔ．）叶片磷脂的主要组分和脂肪酸组成。杜鹃叶膜磷脂主要是磷脂酰胆碱（ＰＣ）、磷脂酰乙醇脂（ＰＥ）、磷脂酰甘油（ＰＧ）和磷脂酰肌醇（ＰＩ），脂肪酸组成主要是棕榈酸（１６０）、反式－３－十六碳烯酸（１６１（ｔ））、硬脂酸（１８０）、油酸（１８１）、亚油酸（１８２）、亚麻酸（１８３）。研究结果表明，叶片膜磷脂的脂肪酸不饱和度及磷脂酰甘油（ＰＧ）的饱和脂肪酸水平均与品种抗寒性相关。抗寒品种毛白杜鹃具有较高的不饱和脂肪酸／饱和脂肪酸比值，其ＰＧ的饱和脂肪酸水平Σ［１６０＋１８０＋１６１（ｔ）］低于不抗寒品种西洋杜鹃。
The fatty acid compositions in phospholipids isolated from the leaves of two varieties of azalea with different chilling resistance were investigated. The two varieties of azalea were Rhododen dron mucronatum G. Don and R. hybridum Hort. In the leaf phosphlipids of azalea, the major phospholipids classes were phosphatidyl choline (PC), phosphatidyl ethanlamine (PE), phosphatidyl glycerol(PG) and phosphatidyl inostitol (PI). The fatty acid compositions were 16∶0, 16∶1(t), 18∶0, 18∶1, 18∶2 and 18∶3. The results showed that both the degree of unsaturated fatty acid in leaf phospholipids and thd level of saturated fatty acid in PG were related to the chilling resistance. The ratio of the unsaturated/ the saturated in the leaf phospholipids from chilling resistant variety Snow Azalea was higher and the level of saturated fatty acids Σ[16∶0+18∶0+16∶1(t)] of PG from it was lower than those of R. hybridum Hort.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
1997年第2期66-69,共4页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家自然科学基金
关键词
杜鹃
抗寒性
叶膜磷脂
磷脂酰甘油
脂肪酸
Azalea
Chilling resistance
Leaf phospholipids
Phosphatidyl glycerol
Fatty acids
