Single gene regulates Casparian strip formation
Researchers at the University of Tokyo and Aberdeen University have identified the master switch for formation of the Casparian strip, a special structure in the root that plays an important role in nutrient uptake.
The Casparian strip is made of lignin, the main component of wood, deposited in a particular location (the anticlinal cell wall) in between endodermal cells in the root. By filling the gap between cells, the Casparian strip prevents harmful materials from entering into plants and also prevents leakage of nutrient from roots.
Although the Casparian strip was first described in 1865 by Robert Caspary and several proteins involved in its formation have been identified, the overall process remained unclear.
The research group of Lecturer Takehiro Kamiya at the University of Tokyo Graduate School of Agricultural and Life Sciences and Professor David E. Salt at the University of Aberdeen isolated an Arabidopsis thaliana mutant with altered leaf concentrations of elements and identified MYB36, a transcription factor, as the causal gene of the mutant.
MYB36 turns on transcription of multiple genes involved in Casparian strip formation, leading to localized lignin deposition in the Casparian strip formation site. Furthermore, the groups succeeded in building Casparian strip-like structures in cells which do not normally form Casparian strips by expressing MYB36 in those cells. These results demonstrate that MYB36 is the master regulator of Casparian strip formation.
This discovery will contribute to our understanding of the control of the Casparian strip and its function in plant nutrient absorption as well as to developing crops with improved efficiency of nutrient uptake.
Casparian strip is made of lignin deposited between endodermal cells. MYB36 positively regulates genes required for both polymerizing lignin and locating lignin polymerizing machinery to the Casparian strip deposition site.
Takehiro Kamiya, Monica Borghi, Peng Wang, John M. Danku, Lothar Kalmbach, Prashant S. Hosmani, Sadaf Naseer, Toru Fujiwara, Niko Geldner, David E. Salt, "The MYB36 transcription factor orchestrates Casparian strip formation", Proceedings of the National Academy of Sciences of the United States of America Online Edition: 2015/6/30 (Japan time), doi: 10.1073/pnas.1507691112.
UTokyo Research article
Euan McKay | ResearchSea
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
21.10.2016 | Information Technology
21.10.2016 | Materials Sciences