Baik Ho Cho

Chonnam National University

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Young Cheol Kim

Chonnam National University

Kwang Yeol Yang

Chonnam National University

Anne J. Anderson

Utah State University

Yang Ju Im

North Carolina State University

Gap Chae Chung

Chonnam National University

Beom Ryong Kang

Chonnam National University

Myung Chul Lee

Harvard University

Kwang‐Yeol Yang

Chonnam National University

Song Hee Han

Linyi University

Dong Up Song

Chonnam National University

Cooperative Institutions

Chonnam National University

Seoul National University

Rural Development Administration

Chunnam Techno University

Korea Research Institute of Bioscience and Biotechnology

Korea University

Chonnam National University Hospital

Jangheung Mushroom Industry Research

National Institute of Agricultural Science and Technology

Utah State University

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The global regulator GacS of a biocontrol bacterium Pseudomonas chlororaphis O6 regulates transcription from the rpoS gene encoding a stationary-phase sigma factor and affects survival in oxidative stress

Gene (2003)

Beom Ryong Kang Baik Ho Cho Anne J. Anderson Young Cheol Kim

rpoS

Pseudomonas chlororaphis

Sigma factor

Housekeeping gene

Transcription

10.1016/j.gene.2003.10.004

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Citations (33)

Production of Indole-3-Acetic Acid in the Plant-Beneficial Strain Pseudomonas chlororaphis O6 Is Negatively Regulated by the Global Sensor Kinase GacS

Current Microbiology (2006)

Beom Ryong Kang Kwang Yeol Yang Baik Ho Cho Tae-Ho Han In Seon Kim

Pseudomonas chlororaphis

Pseudomonas fluorescens

Indole-3-acetic acid

10.1007/s00284-005-0427-x

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Citations (85)

ThedctAgene ofPseudomonas chlororaphisO6 is under RpoN control and is required for effective root colonization and induction of systemic resistance

FEMS Microbiology Letters (2006)

Hyo Song Nam Anne J. Anderson Kwang Yeol Yang Baik Ho Cho Young Cheol Kim

Transcription from the dctA gene, which encodes an organic acid transporter in the root-colonizing bacterium Pseudomonas chlororaphis O6, is under complex regulatory control. Promoter sequence analysis revealed an RpoN binding site. The regulation of transcript accumulation by the level of ammonium ions in the growth medium confirmed RpoN regulation, even in the presence of glucose. A dctA mutant colonized tobacco roots to a lesser extent than the wild-type mutant during early seedling development. Colonization by the dctA mutant, as compared to the wild type, also reduced the level of systemically induced resistance against the soft rot pathogen Erwinia carotovora SCC1. We ascribe this reduced colonization to the inability of the mutant to utilize certain organic acid components in the root exudates. The dctA mutant failed to grow on succinate and fumarate, and showed reduced growth on malate. All altered properties of the mutant were complemented by the full-length dctA gene. We propose that organic acids in root exudates may provide important nutrient sources for the beneficial root-colonizing pseudomonad.

rpoN

Pseudomonas chlororaphis

Pseudomonas putida

Sigma factor

Wild type

10.1111/j.1574-6968.2006.00092.x

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Citations (17)

Transcriptional regulation and mutational analysis of a dctA gene encoding an organic acid transporter protein from Pseudomonas chlororaphis O6

Gene (2003)

Hyo Song Nam Matt Spencer Anne J. Anderson Baik Ho Cho Young Cheol Kim

Pseudomonas chlororaphis

Sugar phosphates

10.1016/j.gene.2003.09.012

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Citations (11)

Screening of Tn5-Induced Less Virulent Mutants of Erwina carotovora subsp. carotovora, Plants Soft Rot Bacterium

Plant Pathology Journal (1993)

Young Cheol Kim Dong Up Song Baik Ho Cho Gap Chae Chung Ki Chung Kim

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Cloning and Expression of Pyrroloquinoline Quinone (PQQ) Genes from a Phosphate-Solubilizing Bacterium Enterobacter intermedium

Current Microbiology (2003)

Chul Hong Kim Song Han Kil Yong Kim Baik Ho Cho Yong Hwan Kim

Pyrroloquinoline Quinone

Cloning (programming)

10.1007/s00284-003-4068-7

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Citations (98)

Leaf Blight of Kiwifruit Caused by Pestalotiopsis menezesiana(Bress. & Torr.) Bissett and Its Ecopathology

Plant Pathology Journal (1997)

Ji Young Park Woong Lee Dong Up Song Ki Young Seong Baik Ho Cho

Pestalotiopsis

Torr

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Mitogen-Activated Protein Kinase Cascade in the Signaling for Polyamine Biosynthesis in Tobacco

Plant and Cell Physiology (2009)

Eun-Kyoung Jang Kwang-Hyun Min Suhyun Kim Seung‐Hee Nam Shuqun Zhang

Expression of NtNEK2(DD), a constitutively active mutant of NtMEK2, activates endogenous salicylic acid-induced protein kinase (SIPK) and wounding-induced protein kinase (WIPK), and leads to several stress/defense responses in tobacco. In this study, we used ACP (annealing control primer)-based differential display reverse transcription-PCR to isolate the downstream effectors mediated by the NtMEK2-SIPK/WIPK cascade. The arginine decarboxylase gene (ADC), which is involved in plant putrescine biosynthesis, was one of nine differentially expressed genes. When compared with NtMEK2(KR) plants, NtMEK2(DD) transgenic plants exhibited a significant increase in ADC and ODC (ornithine decarboxylase) transcript levels, as well as in putrescine and its catabolite, gamma-aminobutyric acid, following SIPK/WIPK activation. Taken together, these results suggest that the NtMEK2-SIPK/WIPK cascade is involved in regulating polyamine synthesis, especially putrescine synthesis, through transcriptional regulation of the biosynthetic genes in tobacco.

Polyamine

MAPK cascade

Arginine decarboxylase

10.1093/pcp/pcp009

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Citations (31)

Cloning of the DNA Fragment Involved in the Pathogenicity of Erwinia carotovora, Plant Soft Rot Bacterium

Plant Pathology Journal (1993)

Young Cheol Kim Dong Up Song Baik Ho Cho Ki Chung Kim

Cloning (programming)

Fragment (logic)

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Antisense expression of an Arabidopsis omega-3 fatty acid desaturase gene reduces salt/drought tolerance in transgenic tobacco plants.

PubMed (2002)

Yang Ju Im Oksoo Han Gap Chae Chung Baik Ho Cho

A wound-inducible Arabidopsis plastid omega-3 fatty acid desaturase (fad7) cDNA was obtained. Transgenic tobacco plants were produced by integration of the antisense fad7 DNA fragments under the control of a CaMV 35S promoter into the genome. Two transgenic T1 lines, AsFAD714 and 716, showed a strong expression of the antisensefad7 and reduced amounts of linolenic acid compared with the control plants. The two T1 lines were highly sensitive to dehydration conditions, showing growth retardation on the MS medium in the presence of 250 mM NaCl, and severe wilting under drought conditions. The expression of the transcriptional factor gene abf4 transducing ABA-dependent signal in response to drought stress was strongly induced in the control plants, but far less in the AsFAD716 line. This suggests that the inhibitory effect of the antisense fad7 gene expression on the ABF-mediated stress-responsive gene regulation may reduce drought tolerance in the AsFAD716 line. However, no significant difference in the ABA concentration was found between the control and the AsFAD716 line under normal and drought conditions.

Fatty acid desaturase

Wilting

Linolenic acid

Plant Physiology

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Citations (56)