Hyaluronic acid of Streptococcus sp. as a potent elicitor for induction of systemic resistance against plant diseases |
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| Authors: | Kyungseok Park Diby Paul Elchae Kim Joseph W Kloepper |
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| Institution: | (1) Plant Pathology Department, National Institute of Agricultural Science and Technology, RDA, Suwon, 441-707, Korea;(2) Department of Environmental Engineering, Konkuk University, Seoul, Korea;(3) Vacctech-Venture cooperation Co., Daejeon, Korea;(4) Department of Entomology and Plant Pathology, Auburn University, Auburn, AL 36849, USA |
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| Abstract: | The potential of hyaluronic acid (HA) in inducing systemic resistance to cucumber, tomato and pepper was tested in planta. In the study, HA was found to be a potent agent for suppressing disease caused by Cucumber Mosaic Virus (CMV) (in pepper),
Pseudomonas syringae pv. tomato (tomato speck disease), Xanthomonas axonopodis pv. vesicatoria (tomato spot disease), Pseudomonas syringae pv. lachrymans (cucumber angular leaf spot), and Colletotrichum orbiculare (cucumber anthracnose). Disease control was obtained with spraying, injection and drenching of plants with HA. HA did not
exhibit direct antimicrobial action against the pathogens tested. Studies carried out in transgenic tobacco indicated that
defense genes PR 1a and PDF 1.2 were activated upon treatment with HA, demonstrating salicylic acid (SA) and jasmonic acid
(JA) pathways getting activated during defense. Further work is warranted to evaluate the use of HA-mediated disease suppression
in crop plants. |
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| Keywords: | Hyaluronic acid Elicitor Induced systemic resistance Plant disease |
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