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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Janus, Lukasz Milczarek, Grzegorz Arasimowicz-Jelonek, Magdalena Abramowski, Dariusz Billert, Hanna Floryszak-Wieczorek, Jolanta |
| Description | Country affiliation: Poland Author Affiliation: Janus L ( Department of Plant Physiology, Poznan University of Life Sciences, Wolynska 35, Poznan, Poland.) |
| Abstract | In our experimental approach we examined how potato leaves exposed to a chemical agent might induce nitric oxide (NO) dependent biochemical modifications for future mobilization of an effective resistance to Phytophthora infestans. After potato leaf treatment with one of the following SAR inducers, i.e. β-aminobutyric acid (BABA), 2,6-dichloroisonicotinic acid (INA) or Laminarin, we observed enhanced NO generation concomitant with biochemical changes related to a slight superoxide anion $(O_{2}^{−})$ and hydrogen peroxide $(H_{2}O_{2})$ accumulation dependent on minimal NADPH oxidase and peroxidase activities, respectively. These rather normoergic changes, linked to the NO message, were mediated by the temporary down-regulation of S-nitrosoglutathione reductase (GSNOR). In turn, after challenge inoculation signal amplification promoted potato resistance manifested in the up-regulation of GSNOR activity tuned with the depletion of the SNO pool, which was observed by our team earlier (Floryszak-Wieczorek et al., 2012). Moreover, hyperergic defense responses related to an early and rapid $O_{2}^{−}and$ $H_{2}O_{2}$ overproduction together with a temporary increase in NADPH oxidase and peroxidase activities were noted. BABA treatment was the most effective against P. infestans resulting in the enhanced activity of β-1,3-glucanase and callose deposition. Our results indicate that NO-mediated biochemical modifications might play an important role in creating more potent defense responses of potato to a subsequent P. infestans attack. |
| File Format | HTM / HTML |
| ISSN | 01689452 |
| Volume Number | 211 |
| e-ISSN | 18732259 |
| Journal | Plant Science |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-10-01 |
| Publisher Place | Ireland |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Botany Gene Expression Regulation, Plant Drug Effects Nitric Oxide Pharmacology Phytophthora Infestans Parasitology Plant Diseases Immunology Plant Proteins Metabolism Solanum Tuberosum Aldehyde Oxidoreductases Aminobutyrates Down-regulation Gene Expression Regulation, Enzymologic Glucans Hydrogen Peroxide Isonicotinic Acids Nadph Oxidase Analysis Peroxidase Plant Leaves Polysaccharides Superoxides Up-regulation Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Medicine Agronomy and Crop Science |
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