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.
Climate Impact Research in Hannover: Small Plants against Large Waves
17.08.2018 | Leibniz Universität Hannover
First transcription atlas of all wheat genes expands prospects for research and cultivation
17.08.2018 | Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
17.08.2018 | Physics and Astronomy
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17.08.2018 | Life Sciences