首页    期刊浏览 2024年07月18日 星期四
登录注册

文章基本信息

  • 标题:Cell wall arabinan is essential for guard cell function
  • 本地全文:下载
  • 作者:Louise Jones ; Jennifer L. Milne ; David Ashford
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:2003
  • 卷号:100
  • 期号:20
  • 页码:11783-11788
  • DOI:10.1073/pnas.1832434100
  • 语种:English
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Stomatal guard cells play a key role in the ability of plants to survive on dry land, because their movements regulate the exchange of gases and water vapor between the external environment and the interior of the plant. The walls of these cells are exceptionally strong and must undergo large and reversible deformation during stomatal opening and closing. The molecular basis of the unique strength and flexibility of guard cell walls is unknown. We show that degradation of cell wall arabinan prevents either stomatal opening or closing. This locking of guard cell wall movements can be reversed if homogalacturonan is subsequently removed from the wall. We suggest that arabinans maintain flexibility in the cell wall by preventing homogalacturonan polymers from forming tight associations.
国家哲学社会科学文献中心版权所有