Science Current Events | Science News | Brightsurf.com
 

Plant perfumes woo beneficial bugs

April 25, 2012

Scientists funded by the Biotechnology and Biological Sciences Research Council (BBSRC) have discovered that maize crops emit chemical signals which attract growth-promoting microbes to live amongst their roots. This is the first chemical signal that has been shown to attract beneficial bacteria to the maize root environment.

The study was led by Dr Andy Neal of Rothamsted Research in Hertfordshire and Dr Jurriaan Ton of the University of Sheffield's Department of Animal and Plant Sciences. By deepening our understanding of how cereals interact with microorganisms in the soil their research aims to contribute to ongoing efforts to increase cereal yields sustainably to feed a growing world population.

This research could be particularly useful in the fight against soil-borne pests and diseases. By breeding plants that are better at recruiting disease suppressing and growth promoting bacteria scientists hope to reduce agricultural reliance on fertilisers and pesticides.

The research is published today (24 April 2012) in the open-access journal PLoS One.

Dr Andrew Neal, who co-led the research, said "We have known for a while that certain plants exude chemicals from their roots that attract other organisms to the area. In fact, the environment around a plant's roots teems with microorganisms and populations of bacterial cells can be up to 100 times denser around roots than elsewhere. Simple compounds such as sugars and organic acids are attractive to these microorganisms as they are a good source of energy; however other more complex chemicals were not known to serve as attractants because they were typically thought of as toxic.

"Now we have evidence that certain bacteria - we studied a common soil bacterium called Pseudomonas putida - use these chemical toxins to locate a plant's roots. The plant benefits from the presence of these bacteria because they make important nutrients like iron and phosphorous more available and help by competing against harmful bacteria around the root system."

The soil around a plant is awash with chemicals exuded by its roots. This makes it rich in nutrients but also potentially more toxic for microorganisms. The roots of young maize plants exude large quantities of chemicals called benzoxazinoids or 'BXs' which are known to play a role in helping the plant defend itself against pests above the ground in its stem and leaves. Dr Neal and Dr Ton found that a number of bacterial genes that are associated with movement responded to one of these BX chemicals, encouraging Psudomonas putida to migrate towards the plant. They also found that the presence of Psudomonas putida accelerated the breakdown of BX molecules suggesting that the bacteria have evolved the ability to detoxify the root environment, perhaps even using BX molecules as an energy source.

Dr Jurriaan Ton from the University of Sheffield co-led the research. He added "Our study has opened up exciting new opportunities for follow-up research. One interesting lead came from our analysis of the bacterial genes that were switched on in the presence of root -produced BX chemicals. This analysis suggested that the BX chemicals not only recruit the bacteria to the root surface, but they also activate processes in these bacteria that can help to suppress soil-borne diseases. This is really exciting as it would mean that the plant is not only recruiting beneficial microbes but also regulating how they behave."

He added "The next important step is to obtain a molecular blueprint of the microbial communities that are shaped by these root chemicals, and to investigate what beneficial impacts these microbes have on plant growth, plant health and soil quality."

Professor Douglas Kell, BBSRC Chief Executive, said "Sustainability must be at the heart of our efforts to help provide the world with enough nutritious food. Only by broadening our focus beyond individual plants and animals, and striving to understand the complex relationships between species, can we ensure that our food supply will be able to weather the challenges of pests and environmental change in the long term. By using advances in computing to study entire biological and ecological systems we can help develop robust solutions to ensure food security."

Biotechnology and Biological Sciences Research Council


Related Microorganisms Current Events and Microorganisms News Articles


Hydrothermal vents, methane seeps play enormous role in marine life, global climate
The hydrothermal vents and methane seeps on the ocean floor that were once thought to be geologic and biological oddities are now emerging as a major force in ocean ecosystems, marine life and global climate.

PNNL helps lead national microbiome initiative
Scientists at the U.S. Department of Energy's Pacific Northwest National Laboratory are playing a central role as the nation devotes more than $500 million to understand communities of microorganisms and their role in climate science, food production and human health.

Fungi -- a promising source of chemical diversity
The fungus Aspergillus fumigatus produces a group of previously unknown natural products. With reference to plant isoquinoline alkaloids, these substances have been named fumisoquins.

Living near a landfill could damage your health
According to research published today in the International Journal of Epidemiology, health is at risk for those who live within five kilometres of a landfill site.

Researchers find that Earth may be home to 1 trillion species
Earth could contain nearly 1 trillion species, with only one-thousandth of 1 percent now identified, according to the results of a new study.

Bacteria in branches naturally fertilize trees
The bacteria in and on our bodies have been shown to be vital for human health, influencing nutrition, obesity and protection from diseases.

New packaging advances prolongs veggie freshness
New advances in packaging at Michigan State University can help produce stay fresh longer.

Immunization with bacteria promotes stress resilience, coping behaviors in mice
Injections of the soil bacterium Mycobacterium vaccae promote stress resilience and improve coping behaviors in mice, according to a new study led by researchers at University of California San Diego School of Medicine and University of Colorado Boulder.

Targeted antibiotic is easier on the gut microbiome
A targeted antibiotic designed for treatment of staph infections caused fewer changes to the gut microbiome of mice than did common broad-spectrum antibiotics.

Methane production reduced in ruminants
Researchers at the Spanish National Research Council (CSIC) have taken part in a study of the effect of one molecule, 3-nitrooxypropanol, in inhibiting methane production in ruminants.
More Microorganisms Current Events and Microorganisms News Articles

Brock Biology of Microorganisms (14th Edition)

Brock Biology of Microorganisms (14th Edition)
by Michael T. Madigan (Author), John M. Martinko (Author), Kelly S. Bender (Author), Daniel H. Buckley (Author), David A. Stahl (Author), Thomas Brock (Author)


ALERT: Before you purchase, check with your instructor or review your course syllabus to ensure that you select the correct ISBN. Several versions of Pearson's MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable. In addition, you may need a CourseID, provided by your instructor, to register for and use Pearson's MyLab & Mastering products.   Packages Access codes for Pearson's MyLab & Mastering products may not be included when purchasing or renting from companies other than Pearson; check with the seller before completing your purchase.   Used or rental books If you rent or purchase a used book with an access code, the access code may have been redeemed previously and you may have to...

Brock Biology of Microorganisms (13th Edition)

Brock Biology of Microorganisms (13th Edition)
by Michael T. Madigan (Author), John M. Martinko (Author), David A. Stahl (Author), David P. Clark (Author)


The authoritative #1 textbook for introductory majors microbiology, Brock Biology of Microorganisms continues to set the standard for impeccable scholarship, accuracy, and outstanding illustrations and photos. This book for biology, microbiology, and other science majors balances cutting edge research with the concepts essential for understanding the field of microbiology.    In addition to a new co-author, David Stahl, who brings coverage of cutting edge microbial ecology research and symbiosis to a brand new chapter (Chapter 25), a completely revised overview chapter on Immunology (Chapter 28), a new "Big Ideas" section at the end of each chapter, and a wealth of new photos and art make the Thirteenth Edition better than ever. Brock Biology of Microorganisms speaks to today’s...

Brock Biology of Microorganisms (12th Edition)

Brock Biology of Microorganisms (12th Edition)
by Michael T. Madigan (Author), John M. Martinko (Author), Paul V. Dunlap (Author), David P. Clark (Author)


The authoritative text for introductory microbiology, Brock Biology of Microorganisms, 12/e, continues its long tradition of impeccable scholarship, outstanding art and photos, and accuracy. It balances the most current coverage with the major classical and contemporary concepts essential for understanding microbiology. Now reorganized for greater flexibility and updated with new content, the authors’ clear, accessible writing style speaks to today’s readers while maintaining the depth and precision they need. Microorganisms and Microbiology, A Brief Journey to the Microbial World, Chemistry of Cellular Components, Structure/Function in Bacteria and Archaea, Nutrition, Culture and Metabolism of Microorganisms, Microbial Growth, Essentials of Molecular Biology, Archael and...

Brock Biology of Microorganisms (15th Edition)

Brock Biology of Microorganisms (15th Edition)
by Michael T. Madigan (Author), Kelly S. Bender (Author), Daniel H. Buckley (Author), W. Matthew Sattley (Author), David A. Stahl (Author)


For courses in General Microbiology.   A streamlined approach to master microbiology Brock Biology of Microorganisms  is the leading majors microbiology text on the market. It sets the standard for impeccable scholarship, accuracy, and strong coverage of ecology, evolution, and metabolism. The 15th edition seamlessly integrates the most current science, paying particular attention to molecular biology and the genomic revolution. It introduces a flexible, more streamlined organization with a consistent level of detail and comprehensive art program.  Brock Biology of Microorganisms  helps students quickly master concepts, both in and outside the classroom, through personalized learning, engaging activities to improve problem solving skills, and superior art and animations...

Brock Biology of Microorganisms

Brock Biology of Microorganisms
by Michael T. Madigan (Author), John M. Martinko (Author)


Great book for college level Microbiology!

Brock Biology of Microorganisms Plus MasteringMicrobiology with eText -- Access Card Package (14th Edition)

Brock Biology of Microorganisms Plus MasteringMicrobiology with eText -- Access Card Package (14th Edition)
by Michael T. Madigan (Author), John M. Martinko (Author), Kelly S. Bender (Author), Daniel H. Buckley (Author), David A. Stahl (Author), Thomas Brock (Author)


ALERT: Before you purchase, check with your instructor or review your course syllabus to ensure that you select the correct ISBN. Several versions of Pearson's MyLab & Mastering products exist for each title, including customized versions for individual schools, and registrations are not transferable. In addition, you may need a CourseID, provided by your instructor, to register for and use Pearson's MyLab & Mastering products.   Packages Access codes for Pearson's MyLab & Mastering products may not be included when purchasing or renting from companies other than Pearson; check with the seller before completing your purchase.   Used or rental books If you rent or purchase a used book with an access code, the access code may have been redeemed previously and you may have to...

Biology of Microorganisms

Biology of Microorganisms
by Thomas D. Brock (Author), etc. (Author), Michael T. Madigan (Editor)


This text emphasizes the principles of microbiology, presenting both the general and molecular aspects of microbiology. The sixth edition expands material on microbial diseases to hrlp instructors taking a medical microbiological approach to the material. It includes revision study questions which are designed to encourage students to synthesize information and draw conclusions.

Soil Microorganisms and Higher Plants: The Classic Text on Living Soils

Soil Microorganisms and Higher Plants: The Classic Text on Living Soils
by N.A. Krasil'nikov (Author)


This book is devoted to the problem of the interaction between soil microorganisms and higher plants. The material presented includes basic information on the structure, development, variability and classification of bacteria, actinomycetes and fungi in the light of recent scientific achievements, as well as information on the importance of microorganisms in plant nutrition, the role of micro-activities in the complementary nutrition of plants, the effect of microbes on the vitamin content of plants, their importance in plant development and their influence on soil fertility. In addition, data are given on the importance of antibiotics as a means of therapy and prevention of diseases in agricultural practice. The book is designed for the use of microbiologists. plant physiologists, soil...

Brock Biology of Microorganisms

Brock Biology of Microorganisms
by Michael T. Madigan (Author), John M. Martinko (Author), Jack Parker (Author)


For majors courses in Introductory Microbiology in departments of biology and microbiology, and for upper-level non-majors courses in Microbiology.The authoritative text for introductory microbiology, Brock's Biology of Microorganisms continues its long tradition of impeccable scholarship, outstanding art, and accuracy. It balances the most current coverage with the major classical concepts essential for understanding the science. The authors' clear, accessible writing style speaks to today's students while maintaining the depth and precision science majors need.

Brock Biology of Microorganisms (10th Edition)

Brock Biology of Microorganisms (10th Edition)
by Michael T. Madigan (Author), John Martinko (Author), Jack Parker (Author)


The book for introductory microbiology, Brock's Biology of Microorganisms continues its long tradition of impeccable scholarship, outstanding art, and accuracy. It balances the most current coverage with the major classical concepts essential for understanding the science. A six-part presentation covers principles of microbiology; evolutionary microbiology and microbial diversity; metabolic diversity and microbial ecology; immunology, pathogenicity, and host responses; microbial diseases; and microorganisms as tools for industry and research. For researchers, group leaders, senior scientists in pharmaceuticals, chemicals and biochemical biotechnology companies, and public health laboratories.

© 2017 BrightSurf.com