大葱生长发育过程中可溶性糖、可溶性蛋白质及游离氨基酸含量变化规律的研究

研究了大葱生长发育过程中可溶性糖、可溶性蛋白、游离氨基酸含量变化动态。结果显示,随着大葱的生长,可溶性糖呈现低-高-低-高的变化规律,但不同材料的变化有差异。日本品种假茎可溶性糖含量变化幅度不大。而地方品种胭脂红、托县孤葱在采收时假茎中可溶性糖含量较高。假茎蛋白质含量表现为高-低-低-高的趋势。定植30 d后假茎蛋白质含量最高,以后随着生长、发育,蛋白质含量逐步下降;到采收期假茎内蛋白质含量又在积累,葱叶中蛋白质含量变化与假茎相似。大部分材料定植后随着大葱的生长发育,假茎中游离氨基酸含量呈上升趋势,近采收期达到最大值。不同材料葱叶中游离氨基酸含量不同,随着生长发育呈现低-高-低-高的变化趋势,葱叶中游离氨基酸含量远远低于假茎。

Studies on the Dynamic Changes of Soluble Sugar,Soluble Protein and Free Amino Acid During Growth and Development of Welsh Onion( Allium fistulosum L.)

In order to know nutrients metabolism of welsh onion during growth and development,the content of soluble sugar,soluble protein and free amino acid of 15 different varieties were analysed.The results showed,changes of soluble sugar in pseudostem of welsh onion development were:low-high-low-high.But different variety changed differently.The content of soluble sugar of varieties came from Japan changed insignificantly.At the harvest time,the content of soluble sugar of Yanzhihong and Tuoxiangucong attained their highest values.Changes of soluble protein in pseudostem of welsh onion development were:high-low-low-high.One month after field planting,the content of soluble protein in pseudostem was highest.Then the content dropped.At he harvest,the content increased again.Changes of soluble protein in leaf were similar with that in pseudostem.The content of free amino acid in pseudostem increased with the growth and development of welsh onion,and got its highest value at the harvest.But in leaf changes were:low-high-low-high.The content of free amino acid in pseudostem was far high than that of in leaf.