摘要
从纵径、横径、体积、重量等方面分析了银杏种子的生长特性及其生长过程中水分、糖类物质、脂肪酸、氨基酸的生理变化 .结果表明 ,银杏种子的生长过程曲线为典型的单“S”型 ,种子纵径、横径、体积、重量、绝对含水量随生长过程呈“S”形变化 .各种生理物质含量随种子生长过程呈规律性变化 ,且各有其特点 .其中在种子生长后期糖类物质总量表现出上升的趋势 ,表明它们是种子中主要的营养储存物质 .成熟种子含淀粉 8.4%、葡萄糖 6.7%、果糖 4.2 %、多糖 0 .0 2 %、二糖 0 .0 1% ;含肉豆蔻酸 10 .6%、棕榈烯酸 4.1%、亚麻酸 2 .4%、硬脂酸1.9%、油酸 1.1%、亚油酸 0 .4% .银杏种子富含 15种氨基酸 ,成熟种子中总含量为 1.5 6g·10 0 g-1FW ,其中以赖氨酸、天门冬氨酸、丙氨酸、精氨酸、组氨酸、谷氨酸、异亮氨酸的含量较高 ,它们的含量依次为 0 .2 87%、0 .163 %、0 .13 6%、0 .13 3 %、0 .12 3 %、0 .115 %、0 .0 95 % .
The length,width,volume and weight of Ginkgo biloba seed were measured,and the concentrations of water,sugars,fatty acids and amino acids in seed growth process were analyzed.A typical “S” seed growth curve was found,and the length,width,volume,weight and absolute water content all showed the similar changes during growing period.With the growing of ssed,the concentrations of physiological substances in seeds showed regular changes and had their own characteristics.The total amount of sugars appeared to be an increasing trend at the later stage of seed growth,indicating that sugars are the main nutrition substance accumulated in seeds.The concentrations of various substances in matured seeds were starch 8.4%,glucose 6\^7%,fructose 4\^2%,polysaccharide 0\^02%,disaccharide 0\^01%,myristic acid 10\^6%,palmitic acid 4\^1%,flax acid 2\^4%,stearic acid 1\^9%,oleic acid 1\^1%,and linoleic acid 0\^4%.Fifteen types of free amino acids were detected in matured seeds,with total content of 1\^56g·100g -1 FW.Among them,lysine aspartic acid,alanine,arginine,histidine,glutamic acid,and isoleucine were dominant,and their concentrations were 0\^287%,0\^163%,0\^136%,0\^133%,0\^123%,0\^115%,0\^095%,respectively.
出处
《应用生态学报》
CAS
CSCD
2000年第4期507-512,共6页
Chinese Journal of Applied Ecology
基金
林业部"九五"重点资助项目!(950 70 1 )
关键词
银杏
生长特性
种子
生理变化
生长曲线
Ginkgo biloba , Growth characteristics, Seed, Physiological change.
