The researchers have developed a model that reproduces statistical properties of venation patterns, based on the assumption that cells can suffer abrupt elastic distortions during growth. These distortions appear due to the elastic stresses generated by the unequal growth rate of different leaf tissues.
Leaf veins are the channels that conduct substances within the leaf and lend support to the leaf tissue. The accepted view of vein formation claims that the transport of the hormone auxin triggers cell differentiation to form veins. Although auxin plays a fundamental role in vein formation, there are important features of the leaf vascular system which remain unexplained. In particular, flux of auxin would produce a tree-like branched vein pattern, reminiscent of a river network, while real venation patterns are highly interconnected, more akin to a crack pattern in mud or paint.
These facts led Fabiana Laguna, Steffen Bohn, and Eduardo Jagla to further analyze a previously-proposed hypothesis that elastic stresses play an important role in leaf venation. To test whether this hypothesis could sustain a quantitative comparison with actual venation patterns, they developed and implemented a numerical model, and found simulated patterns with statistical properties similar to natural ones.
The full explanation for the development of veins could involve both elastic stresses and the influence of auxin, the authors say. They believe that their study could trigger further experimental work to test the relevance of elastic stresses in vein formation.
Novel mechanisms of action discovered for the skin cancer medication Imiquimod
21.10.2016 | Technische Universität München
Second research flight into zero gravity
21.10.2016 | Universität Zürich
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.
Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
21.10.2016 | Health and Medicine
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21.10.2016 | Materials Sciences