Faculty of Biology, University of Latvia
EEB
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Acta Univ Latv (2003) 662: 59–65
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Environmental and
Experimental
Biology

Acta Univ Latv (2003) 662: 59–65

Orginal Article

Possible role of trichomes in resistance of strawberry cultivars against spider mite

Ineta Steinite, Gederts Ievinsh*
Department of Plant Physiology, Faculty of Biology, University of Latvia, Kronvalda bulv. 4, Rīga LV-1848, Latvia
*Corresponding author, E-mail: gederts@lanet.lv

Abstract

The trichome types on leaves of garden strawberry (Fragaria × ananassa) were analyzed. Two types of trichomes was described. The fi rst were unicellular long and thin simple trichomes, located mainly on leaf veins and leaf margins, mostly on the underside of the leaf. The second were smaller multicellular uniseriate glandular trichomes. These trichomes consisted of one basal epidermis cell, several stalk cells, and a single rounded head cell. Strawberry cultivars with different resistance against two-spotted spider mite (Tetranychus urticae Koch) were used to test a hypothesis that higher pubescence in strawberry cultivars is correlated with a higher degree of resistance against the herbivore. Nonglandular trichomes were not the resistance factor for strawberry cultivars against spider mite because trichome density was affected by growth conditions and developmental state. It was concluded that gladular trichome-localized inducible responses are among the potential resistance mechanisms against spider mite in garden strawberry.

Key words: Glandular hairs, polyphenol oxidase, garden strawberry, spider mite, trichomes.

 
Acta Univ Latv (2003) 662: 59–65
 DOI: http://doi.org/10.22364/eeb
EEB

Editor-in-Chief
Prof. Gederts Ievinsh



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University of Latvia

 
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