Copious corn growing in tiny backyard plots? Roses blooming in December?
Thanks to technology that the University of Wisconsin-Madison’s Richard Vierstra has been developing for years, these things may soon be possible. And now, new findings out of the genetics professor’s lab promise to advance that technology even further.
For the first time, Vierstra and his team have revealed the structure of the plant phytochrome, a critical molecule that detects the light that tells plants when to germinate, grow, make food, flower and even age. Like eyes, the phytochrome is a light sensor that converts sunlight into chemical signals to get these jobs done. By manipulating it, the group can alter the conditions under which all plants grow and develop.
Vierstra’s group published the structure in a recent issue of the journal Proceedings of the National Academy of Sciences. His team also presented its results this month at the annual meeting of the American Society of Plant Biologists in Portland, Oregon.
“It’s the molecule that tells plants when to flower,” says Vierstra. “Plants use the molecule to sense where they are in the canopy; they use the phytochromes for color vision — to sense whether they are above, next to or under other plants.”
Vierstra previously determined the structure of a similar phytochrome from light-sensing bacteria, which guided his work in plants. He already has several patents on the technologies derived from these structures and has been in talks to commercialize them. The determination of a plant phytochrome three-dimensional structure will only accelerate improvements to the technology.
One of the biggest moves in agriculture, Vierstra says, is to be able to grow plants at higher density, allowing producers to plant more crops in a given area, thus saving space and other resources.
Currently, there is a limit to how closely plants can grow relative to their nearest neighbors. At high density, the leaves of one plant shade the other, signaling to the shaded plant it isn’t receiving enough sunlight. These plants grow stems and stalks rather than fruits and seeds, becoming long and leggy as they reach for the sky.
That process begins with the phytochrome, which senses the wavelength of light shining on plants. Plants in full sun absorb red light while shaded plants receive only the leftover, far-red light. The type of light the phytochrome “sees” tells the plant whether to stretch out and become taller or to flower and make fruit. Based on the light available, the phytochrome cycles between an inactive and active state.
“Photoconversion between the active and inactive states of phytochromes is arguably the most important twitch on this planet, as it tells plants to become photosynthetic and consequently make the food we eat and the oxygen we breathe,” says Vierstra.
Vierstra and his team found that by making specific changes to the light sensor, they can dupe it into staying in its active state longer.
“By mutating the phytochromes, we created plants that think they’re in full sun, even when they’re not,” Vierstra says.
Three decades ago, while a postdoctoral researcher at UW-Madison, Vierstra was the first to purify the phytochrome protein. Now, his work has come full circle. He hopes the research team’s findings become the scaffold for a toolkit others can use — one that might fundamentally alter agriculture.
In addition to growers, the research also has implications for other scientists, as the technology could be used to create new fluorescent molecules for detecting minuscule events inside cells, and in the field of optogenetics, which uses light as a tool to drive biological change.
The work was supported by grants from the National Science Foundation and the University of Wisconsin College of Agricultural and Life Sciences. The Wisconsin Alumni Research Foundation holds Vierstra’s patents on the technology.
Richard Vierstra, email@example.com
(also available at 608-262-8215 after Aug. 10)
Richard Vierstra | newswise
North and South Cooperation to Combat Tuberculosis
22.03.2018 | Universität Zürich
Researchers Discover New Anti-Cancer Protein
22.03.2018 | Universität Basel
An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.
The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
19.03.2018 | Event News
16.03.2018 | Event News
13.03.2018 | Event News
22.03.2018 | Trade Fair News
22.03.2018 | Earth Sciences
22.03.2018 | Earth Sciences