The microrelief of plant surfaces, mainly caused by epicuticular wax crystalloids, serves different purposes and often causes effective water repellency. Furthermore, the adhesion of contaminating particles is reduced. Based on experimental data carried out on microscopically smooth (Fagus sylvatica L., Gnetum gnemon L., Heliconia densiflora Verlot, Magnolia grandiflora L.) and rough water-repellent plants (Brassica oleracea L., Colocasia esculenta (L.) Schott., Mutisia decurrens Cav., Nelumbo nucifera Gaertn.), it is shown here for the first time that the interdependence between surface roughness, reduced particle adhesion and water repellency is the keystone in the self-cleaning mechanism of many biological surfaces. The plants were artificially contaminated with various particles and subsequently subjected to artificial rinsing by sprinkler or fog generator. In the case of water-repellent leaves, the particles were removed completely by water droplets that rolled off the surfaces independent of their chemical nature or size. The leaves of N. nucifera afford an impressive demonstration of this effect, which is, therefore, called the “Lotus-Effect” and which may be of great biological and technological importance.
Waking the Tiger offers a new and hopeful vision of trauma. It views the human animal as a unique being, endowed with an instinctual capacity. It asks and answers an intriguing question: why are animals in the wild, though threatened routinely, rarely traumatized? By understanding the dynamics that make wild animals virtually immune to traumatic symptoms, the mystery of human trauma is revealed.
Waking the Tiger normalizes the symptoms of trauma and the steps needed to heal them. People are often traumatized by seemingly ordinary experiences. The reader is taken on a guided tour of the subtle, yet powerful impulses that govern our responses to overwhelming life events. To do this, it employs a series of exercises that help us focus on bodily sensations. Through heightened awareness of these sensations trauma can be healed.
March 30th 2021
Dr. Christine Jones presents “Secrets of the Soil Sociobiome”
Links to articles mentioned in the Q&A are found below
1. Re-visioning soil foodwebs
Editorial by Mark Bradford, published in the Journal of Soil Biology & Biochemistry (2016). There are 14 other articles linked to this.
2. Techniques for assessing functional diversity in soils can be found in section 1.6 of the following article, entitled ‘Microbial Signaling in Plant—Microbe Interactions and Its Role on Sustainability of Agroecosystems’
3. Enhancement of drought tolerance in crops by plant growth promoting rhizobacteria
4. The following article is also illuminating ….
Rolfe, S.A, Griffiths, J, Ton, J. (2019). Crying out for help with root exudates: adaptive mechanisms by which stressed plants assemble health-promoting soil microbiomes. Curr Opin Microbiol. 49:73-82. doi: 10.1016/j.mib.2019.10.003.
Professor Iain Stewart tells a stunning new story about our planet. He reveals how the greatest changes to the Earth have been driven, above all, by plants
No bacterium lives alone — it is constantly encountering members of its own species as well as other kinds of bacteria and diverse organisms like viruses, fungi, plants and animals. To navigate a complex world, microbes use chemical signals to sense and communicate with one another.
Live streamed on Monday, January 28th, 2013, from 6-7:30 p.m. at ASM’s headquarters, 1752 N St., NW, Washington, D.C.
Dr. Bonnie Bassler, Princeton University
Bonnie Bassler Ph.D. is a Howard Hughes Medical Institute Investigator and the Squibb Professor of Molecular Biology at Princeton University. The research in her laboratory focuses on the molecular mechanisms that bacteria use for intercellular communication. This process is called quorum sensing. Bassler’s research is paving the way to the development of novel therapies for combating bacteria by disrupting quorum-sensing-mediated communication. Dr. Bassler was awarded a MacArthur Foundation Fellowship in 2002. She was elected to the American Academy of Microbiology in 2002 and made a fellow of the American Association for the Advancement of Science in 2004. Dr. Bassler was the President of the American Society for Microbiology in 2010-2011; she is currently the Chair of the American Academy of Microbiology Board of Governors. She is also a member of the National Science Board and was nominated to that position by President Barak Obama. The Board oversees the NSF and prioritizes the nation’s research and educational priorities in science, math and engineering.
Dr. Steven Lindow, University of California, Berkeley
Steven Lindow Ph.D. is a Professor at the University of California, Berkley where his research focuses on various aspects of the interaction of bacteria with the surface and interior of plants. Dr. Lindow’ s lab uses a variety of molecular and microscopy-based methods to study the ecology of bacterial epiphytes that live on the surface of plants as well as certain bacteria that are vascular pathogens of plants. They also study bacteria that live in and on plants that are fostered by consumption of the alkaloids produced by endophytic fungi. The longer-term goal of their research is to improve plants’ productivity by achieving control of plant diseases through altering the microbial communities in and on plants. Dr. Lindow is a member of the National Academy of Sciences, and was elected to fellowship in both the American Academy of Microbiology and the American Association for the Advancement of Science in 1999.
In The Hidden Life of Trees, Peter Wohlleben shares his deep love of woods and forests and explains the amazing processes of life, death, and regeneration he has observed in the woodland and the amazing scientific processes behind the wonders of which we are blissfully unaware. Much like human families, tree parents live together with their children, communicate with them, and support them as they grow, sharing nutrients with those who are sick or struggling and creating an ecosystem that mitigates the impact of extremes of heat and cold for the whole group. As a result of such interactions, trees in a family or community are protected and can live to be very old. In contrast, solitary trees, like street kids, have a tough time of it and in most cases die much earlier than those in a group.
Drawing on groundbreaking new discoveries, Wohlleben presents the science behind the secret and previously unknown life of trees and their communication abilities; he describes how these discoveries have informed his own practices in the forest around him. As he says, a happy forest is a healthy forest, and he believes that eco-friendly practices not only are economically sustainable but also benefit the health of our planet and the mental and physical health of all who live on Earth.
Barber explores the evolution of American food from the ‘first plate,’ or industrially-produced, meat-heavy dishes, to the ‘second plate’ of grass-fed meat and organic greens, and says that both of these approaches are ultimately neither sustainable nor healthy. Instead, Barber proposes Americans should move to the ‘third plate,’ a cuisine rooted in seasonal productivity, natural livestock rhythms, whole-grains, and small portions of free-range meat.
In this book a master scientist tells the story of how life on earth evolved. Edward O. Wilson eloquently describes how the species of the world became diverse and why that diversity is threatened today as never before. A great spasm of extinction — the disappearance of whole species — is occurring now, caused this time entirely by humans. Unlike the deterioration of the physical environment, which can be halted, the loss of biodiversity is a far more complex problem — and it is irreversible. Defining a new environmental ethic, Wilson explains why we must rescue whole ecosystems, not only individual species. He calls for an end to conservation versus development arguments, and he outlines the massive shift in priorities needed to address this challenge. No writer, no scientist, is more qualified than Edward O. Wilson to describe, as he does here, the grandeur of evolution and what is at stake.
An excellent slideshow by Dr. Trygve Steen concerning Pacific Northwest ecosystems. Dr. Steen discusses many aspects of northwest forests, rainfall, soils, fire regimes as well as various floras of these areas. Also, he emphasizes the inter-relatedness of the many seemingly disparate components of forest ecosystems.
Finally Dr. Steen concludes the presentation with slides of destructive logging practices.
From Pulitzer Prize winner Ed Yong, a groundbreaking, wondrously informative, and vastly entertaining examination of the most significant revolution in biology since Darwin—a “microbe’s-eye view” of the world that reveals a marvelous, radically reconceived picture of life on earth.
Every animal, whether human, squid, or wasp, is home to millions of bacteria and other microbes. Pulitzer Prize-winning author Ed Yong, whose humor is as evident as his erudition, prompts us to look at ourselves and our animal companions in a new light—less as individuals and more as the interconnected, interdependent multitudes we assuredly are.
The microbes in our bodies are part of our immune systems and protect us from disease. In the deep oceans, mysterious creatures without mouths or guts depend on microbes for all their energy. Bacteria provide squid with invisibility cloaks, help beetles to bring down forests, and allow worms to cause diseases that afflict millions of people.
Many people think of microbes as germs to be eradicated, but those that live with us—the microbiome—build our bodies, protect our health, shape our identities, and grant us incredible abilities. In this astonishing book, Ed Yong takes us on a grand tour through our microbial partners, and introduces us to the scientists on the front lines of discovery. It will change both our view of nature and our sense of where we belong in it.