The plant cell wall matrix harbors a precursor of defense signaling peptides

被引：53

作者：

Narváez-Vásquez, J ^{[1
]}

Pearce, G ^{[1
]}

Ryan, CA ^{[1
]}

机构：

[1] Washington State Univ, Inst Biol Chem, Pullman, WA 99164 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2005年 / 102卷 / 36期

关键词：

phloem parenchyma; tomato leaves; wound signals; plant defense;

D O I：

10.1073/pnas.0505248102

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Proteins of plant cell walls serve as structural macromolecules and play important roles in morphogenesis and development but have not been reported to be the origins of peptide signals that activate genes for plant defense. We report here that the mRNA coding the tomato leaf polyprotein precursor of three hydroxyproline-rich glycopeptide defense signals (called LeHypSys I, II, and III) is synthesized in phloem parenchyma cells in response to wounding, systemin, and methyl jasmonate, and the nascent protein is sequestered in the cell wall matrix. These findings indicate that the plant cell wall can play an active role in defense as a source of peptide signals for systemic wound signaling.

引用

页码：12974 / 12977

页数：4

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