ESTs reveal a multigene family for plant defensins in Arabidopsis thaliana

FEBS Letters

Apel, Klaus¹  Epple, Petra¹  Bohlmann, Holger¹ 

[1] Swiss Federal Institute of Technology (ETH), Institute for Plant Sciences, ETH-Zentrum, Universitätstrasse 2, LFW D.58, CH-8092 Zürich, Switzerland

关键词: Plant defence;    Cysteine-rich protein;    Antimicrobial;   

DOI  :  10.1016/S0014-5793(96)01378-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Plant defensins, formerly named γ-thionins, are a group of small, cysteine-rich, basic, and antimicrobial plant proteins. Random sequencing of expressed sequence tags (ESTs) in Arabidopsis thaliana has revealed several different plant defensin genes in this plant species which can be grouped into two subfamilies. We have used one EST of each subfamily to study the expression of the corresponding genes in A. thaliana. Pdf2.3 is constitutively expressed in seedlings, rosettes, flowers, and siliques and is not inducible in seedlings either by methyl jasmonate, salicylate, ethephon, and silver nitrate or by several different phytopathogenic fungi. The expression of a second gene, Pdf1.2, is in untreated plants only detectable in rosettes. In seedlings, it is inducible by methyl jasmonate, silver nitrate, and different phytopathogenic fungi, notably Fusarium oxysporum f. sp. matthiolae. The regulation of Pdf1.2 resembles that of the pathogen-inducible thionin gene Thi2.1.

【 授权许可】

Unknown