Tobacco plants perturbed in the ubiquitin-dependent protein degradation system accumulate callose, salicylic acid, and pathogenesis-related protein 1

被引：22

作者：

Conrath, U

Klessig, DF

Bachmair, A ^{[1
]}

机构：

[1] Univ Vienna, Inst Bot, A-1030 Vienna, Austria

[2] Rutgers State Univ, Waksman Inst, Piscataway, NJ 08855 USA

[3] Rutgers State Univ, Dept Mol Biol & Biochem, Piscataway, NJ 08855 USA

来源：

PLANT CELL REPORTS | 1998年 / 17卷 / 11期

基金：

美国国家科学基金会;

关键词：

lesion mimic; hypersensitive response; ubiquitin-dependent protein degradation ubiquitin variant; tobacco;

D O I：

10.1007/s002990050501

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Transgenic tobacco plants expressing an inhibitor of ubiquitin-dependent protein degradation, ubiquitin variant ubR48, spontaneously formed necrotic lesions and displayed altered responsiveness to tobacco mosaic virus attack. These plants were analyzed for the accumulation of defense-related compounds and the expression of pathogenesis-related proteins, which serve as convenient markers for systemic acquired resistance. Callose was detected in the cells of vascular bundles and in the leaf blade. In addition, ubR48 transgenic plants constitutively accumulated enhanced levels of salicylic acid (SA) and/or its glucoside. Accumulation of SA glucoside coincided with high levels of pathogenesis-related protein 1, underscoring the similarity of certain changes in ubR48-expressing plants to an authentic defense reaction.

引用

页码：876 / 880

页数：5

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