By taking a fresh approach to an old problem, University of California, San Diego biologists and colleagues at other institutions have found a new gene essential for plant growth, a discovery that could lead to the design of better herbicides and even novelty plants.
Images of normal plant (above) and plant exposed to chemical that inactivates the newly discovered gene SIR1 (below)
Credit: Yunde Zhao, UCSD
Despite 100 years of research on auxin, a plant hormone essential in regulating plants’ development and responses to their surroundings, including the ability of plants to grow toward light, much remains unknown about how auxin is synthesized and how it works. A new approach known as “chemical genetics,” in which chemicals are used to regulate activities of proteins produced by specific genes, has revealed a previously unknown gene, SIR1, which functions to keep the effects of auxin in check. The UCSD scientists say that one implication of their discovery is the potential development of environmentally safe herbicides from chemicals that impede the action of auxin by over-activating the SIR1 gene.
A paper featured on the cover of the October 10, 2003 issue of Plant Physiology details the chemical genetic approach. The discovery of the SIR1 gene was reported in the August 22nd issue of Science.
Sherry Seethaler | UCSD
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Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
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In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
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