Microscopic Mojave Desert plants growing on the underside of translucent quartz pebbles can endure both chilly and near-boiling temperatures, scavenge nitrogen from the air, and utilize the equivalent of nighttime moonlight levels for photosynthesis, a new study reports. The plants, which receive enough light through the pebbles to support photosynthesis, could offer a model for how plants first colonized land, as well as how they might have evolved on Mars, said the scientists who performed the study.
"Here you have a really bizarre habitat," said William Schlesinger, dean of Duke Universitys Nicholas School of the Environment and principal author of a paper on the study that appears in the December, 2003 issue of the research journal Ecology, which was just published. "When I first went to the site in 1978 I thought: Thats weird, how do these plants photosynthesize? Then it dawned on me that they photosynthesized on the light coming through the rocks."
Years after he first noticed the primitive plants -- mostly species of blue-green algae -- growing under every quartz pebble he turned over at the site in Californias Joshua Tree National Park, Schlesinger assembled a scientific team to investigate the phenomenon. He said what the scientists learned suggests a possible way that land plants established their first toehold in the harsh conditions of the early Earth: by staying under cover.
Monte Basgall | EurekAlert!
Repairing damaged hearts with self-healing heart cells
22.08.2017 | National University Health System
Biochemical 'fingerprints' reveal diabetes progression
22.08.2017 | Umea University
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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