Category: Volume 4 • 2020

Metabolic Environments and Genomic Features Associated with Pathogenic and Mutualistic Interactions Between Bacteria and Plants

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Comparative analyses of microbial genomic sequences can highlight genomic traits that may function as hallmarks of specific microbial lifestyles. In the July issue, Karpinets and colleagues report on coupling comparative genomics with metabolic network models to identify genomic traits associated with pathogenic versus mutualistic interactions with plants. These genomic hallmarks, which include a putative secretion system in pathogens and a putative RuBisCO-based metabolic pathway in mutualists, were successful in predicting the pathogenic versus mutualistic interactions of 20 recently sequenced microbes. View Article

Spanish translation courtesy of Diana Trujillo, University of Minnesota
 
Análisis comparativos de secuencias genómicas microbianas pueden resaltar rasgos genómicos que posiblemente funcionen para distinguir entre diversos estilos de vida de los microorganismos. En esta edición, Karpinets y sus colegas usaron técnicas de genómica comparativa conjunto con modelos de redes metabólicas para identificar rasgos genómicos asociados a interacciones patogénicas versus mutualistas con plantas. Usando estas características genómicas, que incluyen un sistema de secreción putativo en patógenos y una vía metabólica putativa basada en RuBisCO en mutualistas, fue posible predecir entre interacciones patogénicas y mutualistas en veinte microbios secuenciados recientemente.
Chinese translation courtesy of You Lu, University of Minnesota
微生物基因组序列的对比分析可以突显其基因特征,些特征可能作微生物的特定生存方式的志。在本月期刊中,Karpinets和同事结合比较基因组学和代谢网络模型的分析鉴定出了与植物致病性和与植物互利共生相关联的基因组特征。这些基因组的标志,其中包括一个在病原菌中潜在的分泌系统和一个在共生菌中潜在的基于RuBisCO 的代途径,成功地预测了近期被序的20种微生物的致病性或互利共生相互作用

IS-MPMI Travel Awardees Post Scientific Findings on Facebook

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A new workshop for IS-MPMI travel awardees was added for the first time this year, allowing students to interact with key PI’s they identified. Awardees tweeted and posted summaries on Facebook on key findings during the Congress. To view the the Facebook posts visit facebook.com/ISMPMI or view a full report of all the awardee Facebook posts.

​Share Your News in the IS-MPMI Reporter

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Submit your news, story ideas, or recent graduations to IS-MPMI for publication in IS-MPMI Reporter! Don’t hesitate—items are due September 26, 2014. If you have questions, please contact IS-MPMI Reporter Editor-in-Chief Brad Day.

Endo-Arabinanase BcAra1 Is Novel Host-Specific Virulence Factor of Botrytis cinerea

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The fungal necrotroph Botrytis cinerea is known to require enzymes that degrade host cell walls for its virulence, but degradation of arabinan was not known to be important to the process. In comprehensive work published in the August issue, Nafisi et al. demonstrate that B. cinerea produces an arabinanase, that the encoding gene is induced during infection, and that the gene is required for full virulence on Arabidopsis thaliana. Interestingly, arabinanase is expressed at lower levels during infection of other hosts and in these cases is not required for virulence, indicating the pathogen’s ability to adapt its mode of attack to a particular host.

Chinese translation courtesy of You Lu, University of Minnesota

现已知,死体营养型真菌灰霉病菌(Botrytis cinerea)的致病性依赖于降解寄主细胞壁的酶。然而,聚阿拉伯糖降解的重要性尚未研究透彻。在发表于本月期刊的一项全面的研究中,Nafisi和同事证实了灰霉病菌产生一种聚阿拉伯糖酶,其编码基因在侵染过程中被诱导表达,并且这种酶也是对拟南芥高致病性所必需的。有趣的是,在侵染其它寄主的过程中,聚阿拉伯糖酶处于较低的表达水平,并且不影响对这些寄主的致病性,这表明了该病原菌能够适应针对特定寄主的攻击模式。

Photos and Abstracts from the XVI International Congress Are Now Online

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​Take a look at pictures from this year’s exciting congress on the XVI International Congress website! You can also browse the book of abstracts to find your favorite presentations from the meeting. Visit the Congress website for the most recent post-congress updates.

Tomato ringspot virus Coat Protein

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RNA silencing provides a potent defense against plant viruses; however, most viruses encode suppressor proteins that inhibit one or more steps in the silencing pathway. Several viral RNA-silencing suppressors inhibit Argonaute (AGO) 1, but until now, only inhibition of AGO1-mediated RNA degradation has been observed. In the September issue, Karran and Sanfaçon report that the coat protein of Tomato ringspot virus appears to protect viral RNA from AGO1-mediated inhibition of translation. View Article

New! Renew Your Membership ONLINE!

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The new IS-MPMI website now offers an online renewal option. Once you receive your membership renewal notice, visit www.ismpmi.org/renew, and in just a few minutes your membership will be up-to-date for another year. The new online renewal form will also give you a quick look at your current membership selections, making it easier than ever to update your contact information or add a subscription to MPMI. All you need to renew are your IS-MPMI username and password. Questions? Contact Denise Kessler (+1.651.994.3806).

A Fungal Conserved Gene and Efficient Ectomycorrhiza Formation

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Although ectomycorrhizal symbioses are widespread and important for plant health in many ecosystems, little is known about the genetic requirements for fungal differentiation during mycorrhizal development. In the October issue, Doré and colleagues report T-DNA mutagenesis of the basidiomycete Hebeloma cylindrosporum, resulting in identification of the gene HcMycE1. Disruption of this gene blocks fungal ability to differentiate fungal sheath and Hartig net structures. Identifying HcMycE1 sets the stage for genetic dissection of the fungal side of ectomycorrhizal symbioses. View Article

Check out the IS-MPMI Member Search

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Have you been looking for a colleague to collaborate with on a new research project? Check out the newly enhanced IS-MPMI Member Search, and find fellow IS-MPMI members by work category and research area. You can also do a keyword search to narrow down the results and find your next research partner. Try out Member Search today!

Join Us—Elevate the Science of Molecular Plant-Microbe Interactions

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Plans are underway for the next IS-MPMI Congress! Join us July 17–21, 2016, in Portland, Oregon—an affordable, accessible U.S. city. Portland is the perfect launch point for nearby attractions like Mt. Hood, the Columbia River Gorge, the Willamette Valley wine-growing region, and world-renowned gardens. A short plane ride brings you to other major U.S. cities—including Seattle, Washington, and San Francisco, California, with interesting landmarks and cultures all their own. Look for more information in the coming months.

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