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Rescooped by Sang-Wook Han from Plants and Microbes
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Plant Cell: Novel Plant Immune-Priming Compounds Identified via High-Throughput Chemical Screening Target Salicylic Acid Glucosyltransferases in Arabidopsis (2012)

Plant Cell: Novel Plant Immune-Priming Compounds Identified via High-Throughput Chemical Screening Target Salicylic Acid Glucosyltransferases in Arabidopsis (2012) | MPMI | Scoop.it

Plant activators are compounds, such as analogs of the defense hormone salicylic acid (SA), that protect plants from pathogens by activating the plant immune system. Although some plant activators have been widely used in agriculture, the molecular mechanisms of immune induction are largely unknown. Using a newly established high-throughput screening procedure that screens for compounds that specifically potentiate pathogen-activated cell death in Arabidopsis thaliana cultured suspension cells, we identified five compounds that prime the immune response. These compounds enhanced disease resistance against pathogenic Pseudomonas bacteria in Arabidopsis plants. Pretreatments increased the accumulation of endogenous SA, but reduced its metabolite, SA-O-β-D-glucoside. Inducing compounds inhibited two SA glucosyltransferases (SAGTs) in vitro. Double knockout plants that lack both SAGTs consistently exhibited enhanced disease resistance. Our results demonstrate that manipulation of the active free SA pool via SA-inactivating enzymes can be a useful strategy for fortifying plant disease resistance and may identify useful crop protectants.


Via Suayib Üstün, Kamoun Lab @ TSL
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Rescooped by Sang-Wook Han from Plants and Microbes
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Philosophical Transactions B: Special Issue - Bacterial protein secretion comes of age (2012)

Philosophical Transactions B: Special Issue - Bacterial protein secretion comes of age (2012) | MPMI | Scoop.it

This theme issue covers research progress in protein secretion through bacterial membranes. Secretion systems are important virulence factors in pathogenic bacteria and they are also used by bacteria to adapt to their environment. Recent years have witnessed an explosion of new mechanistic insights, the major ones being fostered by breakthrough in membrane protein biochemistry and structural biology. Secretion systems in bacteria can be classified into a number of categories, termed "type X secretion systems", but each mediating a different type of transport applying to different types of substrates. It is this emphasis in variety in function that will be the primary driver for this issue.


Via Kamoun Lab @ TSL
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Rescooped by Sang-Wook Han from Plants and Microbes
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Video: Plant Pathology: Taking you further than you ever imagined.

In the quest to create a sustainable future, some paths are more direct...more profound...and more tuned-in to discovering the roots of the serious problems that need to be solved. And with the next generation seeing world population swell from 7 to 9 billion people, how will we sustainably increase our food, fiber and fuels using less land and fewer resources? One word: plants. And healthy plants are key. But plants get sick, too. And when disease strikes, disaster can quickly follow. That's why it's more important than ever that today's brightest and best choose their course wisely...and explore new paths that get to the root of some of the most critical problems. For those with insight...for those ready to make an impact, plant pathology is a path that can take you further than you'd ever imagined, or exactly where you'd like to be.

 

Learn about Plant Pathology through this exciting educational video. This video targets undergraduates in biology and related majors with limited agricultural background, and is available for use in classroom settings, on organization websites, on display at career fairs. You can also share it with your colleagues, the opportunities are endless.

To find out more about how to spread the word visit the American Phytopathological Society's website. www.apsnet.org

 

APS also has significant outreach resources. If this video piques your interest, check out our other tools for teach and growing plant pathology. http://www.apsnet.org/members/outreach


Via Kamoun Lab @ TSL
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Rescooped by Sang-Wook Han from Plants and Microbes
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APSnet: The 2009 Late Blight Pandemic in Eastern USA (2012)

APSnet: The 2009 Late Blight Pandemic in Eastern USA (2012) | MPMI | Scoop.it

"A highly contagious fungus [sic] that destroys tomato plants has quickly spread to nearly every state in the Northeast and the mid-Atlantic, and the weather over the next week may determine whether the outbreak abates or whether tomato crops are ruined…" - The New York Times, 18 July 2009, J. Moskin

 

"You say tomato, I say agricultural disaster." - The New York Times, 9 August 2009, D. Barber

 


Via Kamoun Lab @ TSL
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