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植物研究 ›› 2009, Vol. 29 ›› Issue (1): 54-57.doi: 10.7525/j.issn.1673-5102.2009.01.012

• 论文 • 上一篇    下一篇

百合鳞茎淀粉磷酸化酶提取条件的优化

孙红梅;袁思施;王春夏   

  1. 沈阳农业大学园艺学院,辽宁省设施园艺重点实验室,沈阳 110161
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
     

Optimization on the Extractive Technique of Starch Phosphorylase in Lily Bulb

SUN Hong-Mei;YUAN Si-Shi;WANG Chun-Xia   

  1. College of Horticulture,Shenyang Agricultural University;Key Laboratory of Protected Cultivation,Liaoning Province,Shenyang 110161
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-01-20 Published:2009-01-20
  • Supported by:
     

摘要: 为深入研究百合鳞茎淀粉磷酸化酶(SP)的性质及其在鳞茎淀粉代谢中的生理作用,本试验确定了兰州百合鳞茎内SP的最佳提取和测定条件,并对部分酶学性质进行了初步探索。结果表明:SP的最适提取缓冲液为pH5.8的琥珀酸缓冲液;最佳反应体系为以25 mmol·L-1的Glc-1-P为底物,在30℃条件下反应10 min。在pH5~6范围内,SP活性最高;百合鳞茎的SP不易保存且不耐热,4℃条件下保存12 h,酶活力最高残留50%;40℃条件下保存30 min后,SP活力几乎完全丧失。

关键词: 百合, 淀粉磷酸化酶, 提取条件, 测定条件

Abstract: For a deep study on the characters of starch phosphorylase(SP) as well as its physiological effects during starch metabolism, the optimum extractive techniques and measurement conditions of SP in the bulb of Lilium davidii var. unicolor were ascertained, furthermore, some biochemical nature of this enzyme were preliminarily studied in this experiment. The results indicated that the best extractive buffer was succinic acid solution with pH 5.8. The optimal reaction system comprised 25 mmol·L-1 Glc-1-P as substrate, and incubating for 10 min at 30℃. Within the pH scale from 5 to 6, SP presented higher activity. However, SP in lily bulb couldn’t be reserved for a long time and couldn’t sustain higher temperature. Stored for 12 hours at 4℃, SP activity only remained 50%, and almost lost completely after incubating for 30 min at 40℃.

Key words: Lilium davidii var. unicolor, starch phosphorylase(SP), extractive condition, measurement condition

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