Il-Pyung Ahn*" /> " /> Il-Pyung Ahn*, Sang-Woo Lee, Min Gab Kim, Sang-Ryeol Park, Duk-Ju Hwang, and Shin-Chul Bae" /> Il-Pyung Ahn*, Sang-Woo Lee, Min Gab Kim, Sang-Ryeol Park, Duk-Ju Hwang, and Shin-Chul Bae. Mol. Cells 2011;32:7-14. https://doi.org/10.1007/s10059-011-2209-6">
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Mol. Cells 2011; 32(1): 7-14

Published online July 31, 2011

https://doi.org/10.1007/s10059-011-2209-6

© The Korean Society for Molecular and Cellular Biology

Priming by Rhizobacterium Protects Tomato Plants from Biotrophic and Necrotrophic Pathogen Infections through Multiple Defense Mechanisms

Il-Pyung Ahn*, Sang-Woo Lee1, Min Gab Kim, Sang-Ryeol Park, Duk-Ju Hwang, and Shin-Chul Bae

National Academy Agricultural Science, Rural Development Administration, Suwon 441-707, Korea, 1Gyeonggi Province Agricultural Research and Extension Services, Hwaseong 445-972, Korea

Correspondence to : *Correspondence: jinhyung@korea.kr

Received: August 20, 2011; Revised: February 26, 2011; Accepted: March 2, 2011

Abstract

A selected strain of rhizobacterium, Pseudomonas putida strain LSW17S (LSW17S), protects tomato plants (Lyco-persicon esculentum L. cv. Seokwang) from bacterial speck by biotrophic Pseudomonas syringae pv. tomato strain DC3000 (DC3000) and bacterial wilt by necrotrophic Ralstonia solanacearum KACC 10703 (Rs10703). To investigate defense mechanisms induced by LSW17S in tomato plants, transcription patterns of pathogenesis-related (PR) genes and H2O2 production were analyzed in plants treated with LSW17S and subsequent pathogen inoculation. LSW17S alone did not induce transcriptions of employed PR genes in leaves and roots. DC3000 challenge following LSW17S triggered rapid transcriptions of PR genes and H2O2 production in leaves and roots. Catalase infiltration with DC3000 attenuated defense-related responses and resistance against DC3000 infection. Despite depriving H2O2 production and PR1b transcription by the same treatment, resistance against Rs10703 infection was not deterred significantly. H2O2 is indispensable for defense signaling and/or mechanisms primed by LSW17S and inhibition of bacterial speck, however, it is not involved in resistance against bacterial wilt.

Keywords biotroph, necrotroph, priming

Article

Research Article

Mol. Cells 2011; 32(1): 7-14

Published online July 31, 2011 https://doi.org/10.1007/s10059-011-2209-6

Copyright © The Korean Society for Molecular and Cellular Biology.

Priming by Rhizobacterium Protects Tomato Plants from Biotrophic and Necrotrophic Pathogen Infections through Multiple Defense Mechanisms

Il-Pyung Ahn*, Sang-Woo Lee1, Min Gab Kim, Sang-Ryeol Park, Duk-Ju Hwang, and Shin-Chul Bae

National Academy Agricultural Science, Rural Development Administration, Suwon 441-707, Korea, 1Gyeonggi Province Agricultural Research and Extension Services, Hwaseong 445-972, Korea

Correspondence to:*Correspondence: jinhyung@korea.kr

Received: August 20, 2011; Revised: February 26, 2011; Accepted: March 2, 2011

Abstract

A selected strain of rhizobacterium, Pseudomonas putida strain LSW17S (LSW17S), protects tomato plants (Lyco-persicon esculentum L. cv. Seokwang) from bacterial speck by biotrophic Pseudomonas syringae pv. tomato strain DC3000 (DC3000) and bacterial wilt by necrotrophic Ralstonia solanacearum KACC 10703 (Rs10703). To investigate defense mechanisms induced by LSW17S in tomato plants, transcription patterns of pathogenesis-related (PR) genes and H2O2 production were analyzed in plants treated with LSW17S and subsequent pathogen inoculation. LSW17S alone did not induce transcriptions of employed PR genes in leaves and roots. DC3000 challenge following LSW17S triggered rapid transcriptions of PR genes and H2O2 production in leaves and roots. Catalase infiltration with DC3000 attenuated defense-related responses and resistance against DC3000 infection. Despite depriving H2O2 production and PR1b transcription by the same treatment, resistance against Rs10703 infection was not deterred significantly. H2O2 is indispensable for defense signaling and/or mechanisms primed by LSW17S and inhibition of bacterial speck, however, it is not involved in resistance against bacterial wilt.

Keywords: biotroph, necrotroph, priming

Mol. Cells
Sep 30, 2022 Vol.45 No.9, pp. 603~672
COVER PICTURE
The Target of Rapamycin Complex (TORC) is a central regulatory hub in eukaryotes, which is well conserved in diverse plant species, including tomato (Solanum lycopersicum). Inhibition of TORC genes (SlTOR, SlLST8, and SlRAPTOR) by VIGS (virus-induced gene silencing) results in early fruit ripening in tomato. The red/ orange tomatoes are early-ripened TORC-silenced fruits, while the green tomato is a control fruit. Top, left, control fruit (TRV2-myc); top, right, TRV2-SlLST8; bottom, left, TRV2-SlTOR; bottom, right, TRV2-SlRAPTOR(Choi et al., pp. 660-672).

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