Susceptibility to Hydrogen Peroxide and Catalase Activity of Root Nodule Bacteria

Ohwada, Takuji; Shirakawa, Yukika; Kusumoto, M.; Masuda, Hiroshi; Sato, Tetsuya

doi:10.1271/bbb.63.457

Cited by 22 publications

(16 citation statements)

References 22 publications

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“…Generally, free-living rhizobia are more susceptible to ROS-mediated killing than are other common soil bacteria like Bacilli and Pseudomonads (120), suggesting that symbiotic levels of ROS are probably unable to differentially prevent soil pathogens from taking advantage of ITs to invade nodules. One role for ROS production may be to promote proper IT development and growth by either cross-linking cell wall glycoproteins or degrading cell wall-associated polysaccharides to aid IT elongation.…”

Section: Reactive Oxygen and Nitrogen Speciesmentioning

confidence: 99%

Molecular Determinants of a Symbiotic Chronic Infection

2008

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Rhizobial bacteria colonize legume roots for the purpose of biological nitrogen fixation. A complex series of events, coordinated by host and bacterial signal molecules, underlie the development of this symbiotic interaction. Rhizobia elicit de novo formation of a novel root organ within which they establish a chronic intracellular infection. Legumes permit rhizobia to invade these root tissues while exerting control over the infection process. Once rhizobia gain intracellular access to their host, legumes also strongly influence the process of bacterial differentiation that is required for nitrogen fixation. Even so, symbiotic rhizobia play an active role in promoting their goal of host invasion and chronic persistence by producing a variety of signal molecules that elicit changes in host gene expression. In particular, rhizobia appear to advocate for their access to the host by producing a variety of signal molecules capable of suppressing a general pathogen defense response.

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Section: Reactive Oxygen and Nitrogen Speciesmentioning

confidence: 99%

Molecular Determinants of a Symbiotic Chronic Infection

2008

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“…phaseoli was different from that in E. coli (Crockford et al, 1995;Hassan & Fridovich, 1978). Crockford et al (1995) Ohwada et al (1999).…”

Section: Nitrogen Fixation and Catalases In Rhizobia: General Informamentioning

confidence: 99%

Exogenous Catalase Gene Expression as a Tool for Enhancing Metabolic Activity and Production of Biomaterials in Host Microorganisms

Taha¹,

Okuyama²,

Ohwada³

et al. 2012

Innovations in Biotechnology

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“…Шкала: 500 нм азотфиксации и задержки старения необходима эффек-тивная защита против окислительного стресса. Известно, что клубеньковые бактерии (свободно живущие формы) обладают более высокой чувствитель-ностью к Н 2 О 2 , чем другие виды бактерий (Hérouart et al, 1996;Ohwada et al, 1999). Однако они являются симбиотическими микроорганизмами и во время диффе-ренцировки в бактероиды могут использовать защитные реакции растения-хозяина против токсических форм кис-лорода, таких как Н 2 О 2 .…”

Section: обсуждение результатовunclassified

Comparative cytochemical analysis of hydrogen peroxide distribution in pea ineffective mutant SGEFix--1 (sym40) and initial line SGE

Tsyganova

Tsyganov

Borisov

et al. 2009

Ecological genetics

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Comparative cytochemical analysis has revealed differences in hydrogen peroxide distribution in symbiotic nodules of pea initial line SGE and mutant SGEFix<sup>-</sup>-1 (sym40). In the initial line SGE, precipitates of cerium perhydroxide were deposited in the walls of infection threads and in adjacent material in the luminal matrix. In mutant SGEFix<sup>-</sup>-1, an increased deposition of cerium perhydroxide precipitates was observed in the matrix of hypertrophied infection droplets, round bacteria contained in infection threads and also around juvenile bacteroids. The observed pattern of hydrogen peroxide distribution indicates that bacteria in infected cells of mutant nodules are exposed to a stronger oxidative stress compared with nodules of the initial line.

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Susceptibility to Hydrogen Peroxide and Catalase Activity of Root Nodule Bacteria

Cited by 22 publications

References 22 publications

Molecular Determinants of a Symbiotic Chronic Infection

Molecular Determinants of a Symbiotic Chronic Infection

Exogenous Catalase Gene Expression as a Tool for Enhancing Metabolic Activity and Production of Biomaterials in Host Microorganisms

Comparative cytochemical analysis of hydrogen peroxide distribution in pea ineffective mutant SGEFix--1 (sym40) and initial line SGE

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