The Plant Pathology Journal 2005;21(3):195-206.
Published online September 30, 2005.
Mini-Review : Functional Characterization of PR-1 Protein, β-1,3-Glucanase and Chitinase Genes During Defense Response to Biotic and Abiotic Stresses in Capsicum annuum
Jeum Kyu Hong, Byung Kook Hwang
Abstract
Spatial and temporal expression of pathogenesis-related (PR) gene and proteins has been recognized as inducible defense response in pepper plants. Gene expression and/or protein accumulation of PR-1, β-1,3-glucanase and chitinase was predominantly found in pepper plants during the inoculations by Xanthomonas campestris pv.vesicatoria, Phytophthora capsici and Colletotrichum coccodes. PR-1 and chitinase genes were also induced in pepper plants in response to environmental stresses,such as high salinity and drought. PR-1 and chitinase gene expressions by biotic and abiotic stresses were regulated by their own promoter regions containing several stress-related cis-acting elements. Overexpression of pepper PR-1 or chitinase genes in heterogeneous transgenic plants showed enhanced disease resistance as well as environmental stress tolerances. In this review, we focused on the putative function of pepper PR-1, β-1,3-glucanase and chitinase proteins and/or genes at the biochemical, molecular and cytological aspects.
Key Words: chitinase, disease resistance, environmental stress, β-1, 3-glucanase, PR-1
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