Références sur les Plantes

URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-313X.2010.04387.x/abstract Author Address: Department of Plant Microbe Interaction, Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, Cologne 50829, Germany Present address: Department of Biology, Massachusetts Institute of Technology, Cambridge, 02139 MA, USA XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Author: Pan-Hou H Year: 2010 Title: ?? Application of Mercury-resistant Genes in Bioremediation of Mercurials in Environments.

Journal: Yakugaku Zasshi-Journal of the Pharmaceutical Society of Japan 130, 9, 1143-1156.

Accession Number: WOS:000281433800006 Label: ReEn ImpactEnvironnement Bioremediation Keywords: mercury pollution; polyphosphate kinase gene (ppk); merT; merB; transgenic tobacco; bioremediation Abstract: Mercury and its organic compounds, especially methylmercury are extremely hazardous pollutants that have been released into the environment in substantial quantities by natural events and anthropogenic activities. Due to the acute toxicity of these contaminants, there is an urgent need to develop an effective and affordable technology to remove them from the environments. Recently, attempts have been made to utilize bacterial mer operon-mediated reduction and volatilization of mercurials for environmental remediation of mercury pollution. However, application of this technology to the treatment of mercury-contaminated environments has been limited by social concerns about the release of volatile mercury that will become part of the local mercury cycle and repollute the environment again, into the ambient air. To improve this environmental, problem, a new mercury scavenging mechanism that could be expressed in living cells and accumulates mercury from contaminated site without releasing mercury vapor is necessitated. To construct a new biocatalyst that is capable of specifically accumulating mercury from contaminated sites without releasing mercury vapor, we have genetically engineered bacteria and tobacco plant for removal of mercury from wastewater and soils, respectively, to express a mercury transport system and organomercurial lyase enzyme simultaneously, and overexpress polyphosphate, a chelator of divalent metals. The applicability of these new engineered biocatalysts in the environmental remediation of mercurials is evaluated and discussed in this review.

Notes: Times Cited: 0 URL: <Go to ISI>://000281433800006 Author Address: Faculty of Pharmaceutical Sciences, Setsunan University, Osaka, Japan.

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Author: Park Chang-Jin, Lee Sang-Won, Chern Mawsheng, Sharma Rita, Canlas Patrick E, Song Min-Young, Jeon Jong-Seong, Ronald Pamela C, Year: 2010 Title: * Ectopic expression of rice Xa21 overcomes developmentally controlled resistance to Xanthomonas oryzae pv. oryzae.

Journal: Plant Science 179, 5, 466-471.

Date: 2010/11// Label: BaRe Keywords: Oryza sativa Pathogen-associated molecular pattern Pattern recognition receptor XA21 Xanthomonas oryzae pv. oryzae Abstract: Recognition of pathogen-associated molecular patterns (PAMPs) by pattern recognition receptors (PRRs) activates the innate immune response. The rice PRR, XA21, confers robust resistance at adult stages to most strains of the bacterial pathogen Xanthomonas oryzae pv. oryzae (Xoo). Seedlings are still easily infected

by Xoo, causing severe yield losses. Here we report that Xa21 is induced by Xoo infection and that ectopic expression of Xa21 confers resistance at three leaf stage (three-week old), overcoming the developmental limitation of XA21-mediated resistance. Ectopic expression of Xa21 also up-regulates a larger set of defencerelated genes as compared to Xa21 driven by the native promoter. These results indicate that altered regulation of Xa21 expression is useful for developing enhanced resistance to Xoo at multiple developmental stages.

Research highlights