›› 2004, Vol. 12 ›› Issue (2): 129-131,149.DOI: 10.11733/j.issn.1007-0435.2004.02.011

• 研究论文 • 上一篇    下一篇

高羊茅蔗糖合成能力在低温锻炼下的部位差异

王世珍, 蔡庆生   

  1. 南京农业大学生命科学学院, 南京, 210095
  • 收稿日期:2003-01-27 修回日期:2004-03-16 出版日期:2004-05-15 发布日期:2004-05-15
  • 通讯作者: 蔡庆生,E-mail:qscai@njau.edu.cn
  • 作者简介:王世珍,男(1977- ),清华大学生物科学与技术系在读博士研究生
  • 基金资助:
    教育部留学回国人员科研启动基金资助项目(G9812)

Sucrose Phosphate Synthetase and Sucrose Synthetase Activities to the Different Parts of Tall Fescue in Low Temperatures

WANG Shi-zhen, CAI Qing-sheng   

  1. College of Life Science, Nanjing Agricuiltural University, Nanjing, Jiangsu Province 210095, China
  • Received:2003-01-27 Revised:2004-03-16 Online:2004-05-15 Published:2004-05-15

摘要: 高羊茅植株经过10d低温锻炼(4/2℃,昼/夜),体内各部位的蔗糖含量急剧上升,上升幅度依次为茎基>叶片>根系;茎基的蔗糖合酶(SS)和磷酸蔗糖合酶(SPS)的活性皆成倍提高,而叶片仅表现为SPS活性提高;茎基占植株总干重的比值持续加大;茎基是高羊茅在逆境中维持生存的重要器官,高SS活性使其保持较高的卸载和吸纳蔗糖的能力,同时高SPS活性使其保持较高的蔗糖含量,从而提高茎基对低温的抵抗能力。

关键词: 草原学, 低温, 蔗糖合酶, 蔗糖磷酸合酶, 高羊茅

Abstract: Ten days after tall fescue plants being kept in a condition of 4℃ of daytime temperature and 2℃ of night temperature, the sugar content of the different parts of the p1ants rises sharply. The increase in the crown is the most marked, followed by that in the leaves and the roots. In a low temperature, the sucrose synthetase and sucrose phosphate synthetase activities of the crown are induced many times stronger than ever,whereas in the leaves only the sucrose phosphate synthetase activity is displayed. The proportion of the crown weight in the total plant weight increases steadily. In fact, the crown is an important organ that sustains the existence of the plant in stringent conditions. Vivid sucrose synthetase activity ensures the crown’s bearing capacity and enables it to assimilate sugar. It is the highly active sucrose phosphate synthetase that maintains the crown’s significant sugar content and enhances its cold resistance in low temperatures.

Key words: Grassland science, Low temperature, Sucrose synthetase, Sucrose phosphate synthetase, Tall fescue

中图分类号: