The Plant Pathology Journal

The Korean Society of Plant Pathology (한국식물병리학회)
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Morphological Classification of Trichomes Associated with Possible Biotic Stress Resistance in the Genus Capsicum

  • Kim, Hyun-Jung (Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University) ;
  • Seo, Eun-Young (Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University) ;
  • Kim, Ji-Hyun (Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University) ;
  • Cheong, Hee-Jin (Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University) ;
  • Kang, Byoung-Cheorl (Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University) ;
  • Choi, Do-Il (Department of Plant Science and Plant Genomics and Breeding Institute, Seoul National University)
  • Received : 2011.10.23
  • Accepted : 2011.12.31
  • Published : 2012.03.01
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Abstract

Trichomes are specialized epidermal structure having the functions of physical and chemical block against biotic and abiotic stresses. Several studies on $Capsicum$ species revealed that virus and herbivore resistance is associated with trichome-formation. However, there is no research on the structural characterization of trichomes developed on the epidermis of $Capsicum$ spp. Thus, this study attempts to charaterize the trichome morphologies in 5 species of $Capsicum$ using a Field Emission Scanning Electron Microscopy (FESEM). Six main trichome types were identified by their morphology under FESEM. Both glandular and non-glandular types of trichomes were developed on the epidermal tissues of $Capsicum$ spp. The glandular trichome were further classified into type I, IV and VII according to their base, stalk length, and stalk. Non-glandular trichomes were also classified into type II, III, and V based on stalk cell number and norphology. Almost all the species in $C.$ $chinense$ and $C.$ $pubescens$ had glandular trichomes. To our knowledge, this is the first study on classification of trichomes in the genus $Capsicum$ and, our results could provide basic informations for understanding the structure and function of trichomes on the epidermal differentiation and association with biotic stress tolerance.

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References

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