Salicylic acid is involved in resistance responses in the Russian wheat aphid-wheat interaction

The effect of Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), infestation on the salicylic acid (SA) content and catalase (EC 1.11.1.6) activity were studied in resistant (cv. Tugela DN) and near-isogenic susceptible (cv. Tugela) wheat ( Triticum aestivum L.). The aim was to gain information...

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Bibliographic Details
Published in:Journal of plant physiology Vol. 159; no. 6; pp. 585 - 590
Main Authors: Mohase, Lintle, van der Westhuizen, Amie J.
Format: Journal Article
Language:English
Published: Jena Elsevier GmbH 2002
Elsevier
Elsevier Science Ltd
Subjects:
Biological and medical sciences
catalase
Diuraphis noxia
enzyme activity
Fundamental and applied biological sciences. Psychology
peroxidase
pest resistance
Phytopathology. Animal pests. Plant and forest protection
Protozoa. Invertebrates
Records, symptoms, damages, economic importance, population surveys
resistance responses
Russian wheat aphid
salicylic acid
signalling
Triticum aestivum
Wheat
Russian wheat aphid
resistance responses
catalase
signalling
Triticum aestivum
Monocotyledones
Insecta
Cereal crop
Signal transduction
Pest
Homoptera
Enzymatic activity
Catalase
Gramineae
Angiospermae
Aphididae
Peroxidase
Salicylic acid
Aphidoidea
Enzyme
Diuraphis noxia
Sensitivity resistance
Peroxidases
Animal plant relation
Arthropoda
Defense mechanism
Pest resistance
Spermatophyta
Oxidoreductases
Invertebrata
Biological accumulation
ISSN:0176-1617, 1618-1328
Online Access:Get full text
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Summary:The effect of Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), infestation on the salicylic acid (SA) content and catalase (EC 1.11.1.6) activity were studied in resistant (cv. Tugela DN) and near-isogenic susceptible (cv. Tugela) wheat ( Triticum aestivum L.). The aim was to gain information on the involvement of SA in the resistance responses in wheat against the RWA. RWA infestation selectively induced SA accumulation and peroxidase (EC 1.11.1.7) activity in the resistant wheat. Catalase activity was, however, inhibited in both resistant and susceptible wheat plants. Intercellularly applied SA confirmed the possible inhibitory effect of SA on catalase and stimulating effect on defense responses as indicated by peroxidase used as a marker. Results suggest the involvement of SA in the resistance of wheat against the RWA. A SA inhibitable catalase is also present in wheat; indications are that it may not be involved in SA-mediated defence responses.
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ISSN:0176-1617
1618-1328
DOI:10.1078/0176-1617-0633