Cell signalling following plant/pathogen interactions involves the generation of reactive oxygen and reactive nitrogen species

By J. Hancock, Radhika Desikan, Andrew Clarke, R. Hurst, S. Neill. 2002

110 citations recorded by the source corpus.

It is now clear that reactive oxygen species (ROS), such as hydrogen peroxide (H2O2), and reactive nitrogen species, such as nitric oxide (NO), are produced by plant cells in response to a variety of stresses, including pathogen challenge. Such molecules may be involved in direct defence mechanisms, such as cross-linking of plant cell walls, or as antimicrobial agents. However, it is also apparent that cells generate such reactive species as signalling molecules, produced at controlled levels, and leading to defined responses. Signalling responses to ROS and NO include the activation of mitogen-activated protein kinases, and the up- and down-regulation of gene expression, often leading to localised programmed cell death, characteristic of the hypersensitive response. Therefore, ROS and NO are key molecules which may help to orchestrate events following pathogen challenge. Here we review the generation and role of both reactive oxygen and reactive nitrogen species in plant cells.

Subfields: Molecular Biology, Plant Science

View Paper: https://www.semanticscholar.org/paper/8ab03a1db099b88423d569dca058bf515a4f9229

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In Molecular Biology

1. S. Tian
2. H. Yao
3. Yong Xu

In Plant Science

1. S. Tian
2. G. Qin
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4. Yong Xu
5. Xiangbin Xu
6. Zhulong Chan

Citations in the corpus

• Changes in the activities of pro- and anti-oxidant enzymes in peach fruit inoculated with Cryptococcus laurentii or Penicillium expansum at 0 or 20 °C (2004, background): “These molecules may play a dual role in defense including direct antibiotic activity such as cross-linking of cell walls or antimicrobial agents, and an indirect effect as signals that mediate the systemic activation of gene expression in response to pathogens (Low and Merida, 1996; Hancock et al.,”
• Reactive oxygen species, nitric oxide and glutathione: a key role in the establishment of the legume-Rhizobium symbiosis? (2002, background): “Recent data indicate that NO is also present in plants and participates in the regulation of plant development and plant defense to pathogens [10,25,27].”
• Plant peroxidases: biomarkers of metallic stress (2011, background): “Induction of oxidative stress is not limited to metal stress, but could be also caused by several other biotic and abiotic factors: pathogens (Hancock et al. 2002), chilling (Lee and Lee 2000), water deficit (Chakarabotry et al.”
• Plant mitochondrial pathway leading to programmed cell death (2007, background): “NO is also produced by different mechanisms in some plant cell sites (Hancock et al. 2002), including also mitochondria (Guo and Crawford 2005).”