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


An all-natural sunscreen derived from algae
For consumers searching for just the right sunblock this summer, the options can be overwhelming. But scientists are now turning to the natural sunscreen of algae -- which is also found in fish slime -- to make a novel kind of shield against the sun's rays that could protect not only people, but also textiles and outdoor materials.

Cystic fibrosis microorganisms survive on little to no oxygen
Microbes contributing to cystic fibrosis (CF) are able to survive in saliva and mucus that is chemically heterogeneous, including significant portions that are largely devoid of oxygen, according to a study published this week in mBio¨, the online open-access journal of the American Society for Microbiology.

Probiotics improve behavioral symptoms of chronic inflammatory diseases in mice
Probiotics may improve the behavioral symptoms of chronic inflammatory diseases by altering communication between the immune system and the brain, according to an animal study published July 29 in the Journal of Neuroscience.

Small genetic differences could spell life-and-death for gut infections
Considering how many microorganisms we ingest each day, our gut has an extensive and well-developed immune system.

UV light can kill foodborne pathogens on certain fruits
The growing organic produce industry may soon have a new way to ensure the safety of fresh fruits.

Small oxygen jump helped enable early animals take first breaths
If oxygen was a driver of the early evolution of animals, only a slight bump in oxygen levels facilitated it, according to a multi-institutional research team that includes a Virginia Tech geoscientist.

Ocean acidification may cause dramatic changes to phytoplankton
Oceans have absorbed up to 30 percent of human-made carbon dioxide around the world, storing dissolved carbon for hundreds of years.

New study reveals mechanism regulating methane emissions in freshwater wetlands
Though they occupy a small fraction of the Earth's surface, freshwater wetlands are the largest natural source of methane going into the atmosphere. New research from the University of Georgia identifies an unexpected process that acts as a key gatekeeper regulating methane emissions from these freshwater environments.

Got acne? Lay off the B12
Vitamin B12 tweaks how genes behave in the facial bacteria of some people who normally enjoy clear skin. The activity changes of the facial bacteria promote inflammation and lead to pimples.

New colon cancer culprit found in gut microbiome
Changes in the gut bacteria of colon cancer patients indicate that some virulent bacteria could be linked to the progression of the disease, according to research published in the open access journal Genome Medicine.
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 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...

Micro Mania

Micro Mania
by Jordan D. Brown (Author)


Get ready to be grossed out!

Try not to panic, but a million creatures are crawling all over your skin--wriggling on your legs, your neck, your scalp...everywhere! And that's only on the outside of our bodies. Trillions more of these itty-bitty things are thriving INSIDE!

Here's a big treat for every kid who loves the squirmy, icky, buggy, and the generally gross. Sensationally designed, with eye-opening, jaw-dropping photography, MICRO MANIA takes a close-up look at a world that's mostly invisible to us. It's an amazing universe that comes into astonishingly large-scale focus on these spectacular pages--which showcase everything from luminescent, furry-green bacteria and flowerlike virus cells to maggots, mold, and more.

But this is more than just a collection of...

Microorganisms in Foods 8: Use of Data for Assessing Process Control and Product Acceptance (Intl Commission on Microbiological Specifications for Foods)

Microorganisms in Foods 8: Use of Data for Assessing Process Control and Product Acceptance (Intl Commission on Microbiological Specifications for Foods)
by International Commission on Microbiological Specifications for Foods (ICMSF) (Author)


Microorganisms in Foods 8: Use of Data for Assessing Process Control and Product Acceptance is written by the International Commission on Microbiological Specifications for Foods with assistance from a limited number of consultants. The purpose of this book is to provide guidance on appropriate testing of food processing environments, processing lines, and finished product to enhance the safety and microbiological quality of the food supply. Microorganisms in Foods 8 consists of two parts. Part I, Principles of Using Data in Microbial Control, builds on the principles of Microorganisms in Foods 7: Microbiological Testing in Food Safety Management (2002), which illustrates how HACCP and Good Hygienic Practices (GHP) provide greater assurance of safety than microbiological testing, but also...

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...

Holt Science & Technology: Microorganisms, Fungi, and Plants Short Course A

Holt Science & Technology: Microorganisms, Fungi, and Plants Short Course A
by Holt, Rinehart and Winston (Publisher)


Chapter 1 - It's Alive!! Or is it? Section 1 - Characteristics of Living Things Section 2 - The Necessities of Life Chapter 2 - Bacteria and Viruses Section 1 - Bacteria and Archaea Section 2 - Bacteria's Role in the World Section 3 - Viruses Chapter 3 - Protists and Fungi Section 1 - Protists Section 2 - Kinds of Protists Section 3 - Fungi Chapter 4 - Introduction to Plants Section 1 - What Is a Plant? Section 2 - Seedless Plants Section 3 - Seed Plants Section 4 - Structures of Seed Plants Chapter 5 - Plant Processes Section 1 - Photosynthesis Section 2 - Reproduction of Flowering Plants Section 3 - Plant Responses to the Environment

Micro Monsters: Life Under the Microscope

Micro Monsters: Life Under the Microscope
by Christopher Maynard (Author)


Micro Monsters is a level 4 reader, and suited for students in grades 2 to 4. Look through the microscope at all the amazing creatures living in, on, and around you! These 48-page books about fascinating subjects like pirates, mummies, and volcanoes are for proficient readers who can understand a rich vocabulary and challenging sentence structure. In addition to the stunning photographs, informative sidebars, and glossary, readers will find archival photographs and paintings. Averaging 4,500 to 5,000 words in length, Level 4 books are 40 percent pictures and 40 percent text. The Dorling Kindersley Readers combine an enticing visual layout with high-interest, easy-to-read stories to captivate and delight young bookworms who are just getting started. Written by leading children's authors...

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...

Brock Biology of Microorganisms, Books a la Carte Edition (14th Edition)

Brock Biology of Microorganisms, Books a la Carte Edition (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)


NOTE:¬† This edition features the exact same content as the traditional text in a convenient, three-hole-punched, loose-leaf version. Books a la Carte also offer a great value for your students‚Äďthis format costs 35% less than a new textbook. 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.

xxxxxxxxxxxxxxxx

The authoritative #1 textbook for introductory majors microbiology, Brock Biology of...

Brock Biology of Microorganisms, Books a la Carte Plus Mastering Microbiology with eText -- Access Card Package (14th Edition)

Brock Biology of Microorganisms, Books a la Carte Plus Mastering Microbiology 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)


NOTE: Books a la Carte are unbound, three-hole-punch versions of the textbook. This lower cost option is easy to transport and comes with same access code or media that would be packaged with the bound book.
XXXXXXXXXXXXXXXXXXXXXXX

An introduction to microbiology for biology and microbiology majors.
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, including strong coverage of ecology, evolution, and metabolism.

The Fourteenth Edition...

© 2015 BrightSurf.com