The research is producing new experimental methods, data acquisition, and theoretical understanding. Recently, scientists from the U.S. Salinity Laboratory, USDA-Agricultural Research Service, assembled a collection of new research in the form of 13 papers that are published as a special section of the August issue of Vadose Zone Journal.
Like most things that exist underground, plant roots are out-of-sight and easily forgotten, but while flowers, leaves, and other aboveground plant parts are more familiar, plant roots are equally deserving of our appreciation. Beneath every towering tree, tasty crop, and dazzling ornamental lies a root system that makes it all possible. Roots provide anchor and support for plants, extract water and nutrients from soil, and reduce soil erosion. Roots also play an important role in soil carbon cycling and the global carbon balance.
A number of current issues related to water availability and climate change are giving impetus to new research aimed at roots and their functioning. The research is producing new experimental methods, data acquisition, and theoretical understanding. Recently, scientists from the U.S. Salinity Laboratory, USDA-Agricultural Research Service, assembled a collection of new research in the form of 13 papers that are published as a special section of the August issue of Vadose Zone Journal. Some of the research in these papers was presented at the 2006 Soil Science Society of America Annual Meeting (Indianapolis, IN) and the 2007 European Geosciences Union General Assembly (Vienna, Austria).
Several of the collected papers take aim at the "out-of-sight" problem, using advanced imaging technologies to observe roots and their functioning at the scale of a single plant or root. Imaging technologies such as Magnetic Resonance Imaging (MRI) are more commonly used in medical and industrial applications, and their use in root research requires new measurement procedures and protocols. In the collected works, researchers were able to successfully obtain images of growing root systems and were able to observe water uptake patterns.
Another current research topic concerns the role of roots in carbon cycling and the implications for global climate change. New research reported in the special section demonstrates that root and carbon dynamics are highly complex, requiring nearly continuous monitoring to understand the biophysical factors that regulate belowground carbon dynamics.
A few of the collected papers are concerned with the development of mathematical models that simulate various root processes, including the uptake of water. These types of models form the basis for various computer simulation tools that are currently used in agricultural and environmental management. For example, one paper in the collection uses such a model to investigate the role of root uptake in regulating the movement of plutonium in soils at the Savannah River nuclear materials processing site.
Roots can also be studied at the level of plant species or biomes. Included in the new collection is research reporting on differences in root zone hydrologic behavior for various species in chaparral ecosystems. The observed differences are minor, but there are detectible differences in how different vegetation affects the water budget. Other research looks at factors affecting rooting depth for different soils, climates, and vegetation. The authors conclude that many ecological factors favor shallow roots over deep roots, and hypothesize that root distributions for particular plant communities tend to be only as deep as necessary to meet specific water requirements.
Todd Skaggs and Peter Shouse, both of the U.S. Salinity Laboratory, Riverside, CA, served as guest editors of the special section, Roots and Root Function, and introduce the papers in a preface to the special section.
The full article is available for no charge for 30 days following the date of this summary. View the abstract at http://vzj.scijournals.org/cgi/content/full/7/3/1008.
Vadose Zone Journal, http://www.vadosezonejournal.org/ is a unique publication outlet for interdisciplinary research and assessment of the biosphere, with a focus on the vadose zone, the mostly unsaturated zone between the soil surface and the permanent groundwater table. VZJ is a peer-reviewed, international, online journal publishing reviews, original research, and special sections across a wide range of disciplines that involve the vadose zone, including those that address broad scientific and societal issues. VZJ is published by Soil Science Society of America, with Geological Society of America as a cooperator.
The Soil Science Society of America (SSSA) is a progressive, international scientific society that fosters the transfer of knowledge and practices to sustain global soils. Based in Madison, WI, and founded in 1936, SSSA is the professional home for 6,000+ members dedicated to advancing the field of soil science. It provides information about soils in relation to crop production, environmental quality, ecosystem sustainability, bioremediation, waste management, recycling, and wise land use.
SSSA supports its members by providing quality research-based publications, educational programs, certifications, and science policy initiatives via a Washington, DC, office. For more information, visit http://www.soils.org.
SSSA is the founding sponsor of an approximately 5,000-square foot exhibition, Dig It! The Secrets of Soil, opening July 19, 2008 at the Smithsonian's National Museum of Natural History in Washington, DC.
Sara Uttech | Newswise Science News
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology