Free radical-mediated systemic immunity in plants

David Wendehenne, Qing ming Gao, Aardra Kachroo, Pradeep Kachroo

Research output: Contribution to journalReview articlepeer-review

98 Scopus citations


Systemic acquired resistance (SAR) is a form of defense that protects plants against a broad-spectrum of secondary infections by related or unrelated pathogens. SAR related research has witnessed considerable progress in recent years and a number of chemical signals and proteins contributing to SAR have been identified. All of these diverse constituents share their requirement for the phytohormone salicylic acid, an essential downstream component of the SAR pathway. However, recent work demonstrating the essential parallel functioning of nitric oxide (NO)-derived and reactive oxygen species (ROS)-derived signaling together with SA provides important new insights in the overlapping pathways leading to SAR. This review discusses the potential significance of branched pathways and the relative contributions of NO/ROS-derived and SA-derived pathways in SAR.

Original languageEnglish
Pages (from-to)127-134
Number of pages8
JournalCurrent Opinion in Plant Biology
StatePublished - Aug 2014

Bibliographical note

Funding Information:
This review was made possible by the tireless contributions of members (past and present) of the Kachroo (A. and P.) and Wendehenne laboratories who contributed to SAR and free radical work. We sincerely regret the omission of other eminent contributions due to space limitations. Work in our laboratories is funded from the National Science Foundation (IOS# 0749731 , #051909 ), United Soybean Board (1244), the Agence Nationale de la Recherche (program BLAN072_184783 PIANO) and the Conseil Régional de Bourgogne (PARIAGRALE 8 project).

ASJC Scopus subject areas

  • Plant Science


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