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.Contacts
22.02.2018 | Albert-Ludwigs-Universität Freiburg im Breisgau
Separate brain systems cooperate during learning, study finds
22.02.2018 | Brown University
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
22.02.2018 | Life Sciences
22.02.2018 | Physics and Astronomy
22.02.2018 | Earth Sciences