A New Transporter Gene that Regulates Plant Transpiration
A study in transport genes leads to better understandings in drought tolerance
When plants feel stress from a lack of water, they close their epidermal pores, or stomata, to prevent water loss via transpiration. Each stoma is flanked by a pair of guard cells, which change shape to close or open stomata through the exchange of various biological materials.
Guard cells therefore play an important role in water evaporation by responding to environmental conditions and stress. However, the mechanisms that control the opening and closing of stomata are not fully understood.
PSC’s Gene Discovery Research Group has identified a new transporter gene that is expressed in guard cells and controls the opening and closing of stomata. The group found that when this gene is deficient, guard cells have difficulty closing, which results in greater transpiration. Using thermal imaging to observe transpiration in Arabidopsis thaliana, researchers observed that transpiration increased in mutants with the AtABCG22 gene, which belongs to the ABC family of transporter genes. The stomata in this mutant open easily, leading to increased transpiration.
When water was withheld, the mutant wilted before its wild-type counterpart. AtABCG22 is expressed in above-ground leaves and especially in stomatal guard cells. When AtABCG22 protein was inserted into onion cells and plant cultured cells, the protein localized in cell membranes, indicating that AtABCG22 is involved in transporting biological materials into or out of guard cells.
If the mechanisms regulating opening and closing of stomata can be clarified, it should provide new insights that can be use to improve crop yields and adapt breeds for arid conditions.
Plant Science Center, RIKEN
Dr. Kazuo Shinozaki (Group Director):
TEL 045-503-9579, FAX 045-503-9580
Dr. Takashi Kuromori (Senior Researcher):
TEL 045-503-9442, FAX 045-503-9489
gro-pr | Research asia research news
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
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...