Evidence against specific binding of salicylic acid to plant catalase

FEBS Letters

Zenk, Meinhart H.²  Rüffer, Martina²  Steipe, Boris¹ 

[1] Genzentrum der Ludwig-Maximilians-Universität München, D-81375 München, Germany;Lehrstuhl für Pharmazeutische Biologie, Ludwig-Maximilians-Universität München, Karlstr.29, D-80333 München, Germany

关键词: Salicylic acid;    Unspecific binding to iron-containing proteins;    Role in disease resistance;   

DOI  :  10.1016/0014-5793(95)01334-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

It was demonstrated that salicylic acid (SA) not only binds to catalase from differentiated higher plants and plant cell suspension cultures but also to those of fungi and animals. SA bound specifically to iron-containing enzymes, such as catalase, aconitase, lipoxidase and peroxidase, while not to iron-free plant enzymes. On the grounds of these experiments, the claim is further challenged that SA is a signalling compound and second messenger in plants that activates plant defense-related genes through elevated H₂O₂ levels by specifically inhibiting catalase activity. SA may just function as a phytoalexin.

【 授权许可】

Unknown