General defense reaction in the plant kingdom

J. Szarka; O. Toldi; E. Szarka; J. Remenyik; et al.

doi:10.1556/AAgr.54.2006.2.9

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Acta Agronomica Hungarica

Volume/Issue:: Volume 54: Issue 2

General defense reaction in the plant kingdom

Authors:

J. Szarka

J. Szarka Primordium Ltd. Budapest, Hungary

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O. Toldi

O. Toldi Institute of Plant Biology, Agricultural Biotechnology Center Gödöllő, Hungary

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E. Szarka

E. Szarka Department of Genetics and Plant Breeding, Faculty of Horticultural Science, Corvinus University of Budapest, Budapest, Hungary

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J. Remenyik

J. Remenyik Department of Vegetable Crops and Horticultural Biotechnology, Faculty of Agriculture, Centre of Agricultural Sciences, University of Debrecen Debrecen, Hungary

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et al.

et al.
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Pages:: 221–232

Online Publication Date:: 08 Aug 2006

Publication Date:: 01 Jun 2006

Article Category:: Research Article

DOI:: https://doi.org/10.1556/AAgr.54.2006.2.9

Keywords:: hypersensitive reaction; cell destruction; pepper; general defense reaction; salicylic acid (SA); cell division; hydrogen peroxide (H2O2)

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The fact that production is often unsuccessful even when resistant varieties are selected on the basis of the hypersensitive reaction can be attributed to the lack of adequate knowledge on plant disease resistance. In addition to specific plant responses to pathogen species, plants also possess an aspecific defense reaction which, instead of causing rapid tissue destruction, is based on the opposite strategy, protecting the plant against attack by microbes through tissue compaction achieved by cell enlargement and cell division. Genetic analyses carried out in pepper revealed that the general defense reaction was inherited as a monogenic recessive trait (gds). Pathophysiological observations indicate that the stimulus threshold is lower and the reaction rate faster than for specific defense reactions. Biochemical analyses suggest that, unlike plants exhibiting rapid tissue destruction, plants containing the gds gene do not require an oxidative burst elicited by hydrogen peroxide to stimulate the defense mechanism. It was also found that the regulation of the general defense system involves metabolic pathways that are independent of salicylic acid. The general and specific plant reactions form an integrated system of plant defense.

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Acta Agronomica Hungarica

Print ISSN:: 0238-0161

Online ISSN:: 1588-2527

Acta Agronomica Hungarica
Language	English Russian German French
Size
Year of Foundation	1950
Publication Programme	ceased
Volumes per Year
Issues per Year
Founder	Magyar Tudományos Akadémia
Founder's Address	H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher	Akadémiai Kiadó
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0238-0161 (Print)
ISSN	1588-2527 (Online)