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Tag: "photosynthesis" at biology news

Yellowstone microbes fueled by hydrogen, according to U. of Colorado study

...n Earth, hydrogen can be producedbiogenetically by photosynthesis and fermentation or non-biogeneticallyby water reacting with iron-bearing rock. It's possible thatnon-biogenic processes produce hydrogen on Mars and that some microbiallife form could be using that," he said.There are many examples of bacteria livin...

Poplar trees redirect resources in response to simulated attack

...corporated the C-11 radiotracer via the process of photosynthesis one hour later. Panel A shows the distribution of carbohydrate in the untreated plant (red is high; blue is low). Panel B shows that when that same plant is retested after exposure to jasmonic acid, a potent plant hormone that makes the plant 'think'...

Scientists discover unique microbe in California's largest lake

...possible habitats where oxygencould be produced by photosynthesis using wavelengths of light thatexist beyond the visible spectrum."The PNAS article is co-authored by Miller and Wood along with SunnyAugustine and Jeanne Selker of the University of Oregon and Tien LeOlson and Robert E. Blankenship of Arizona State U...

World's largest rainforest drying experiment completes first phase

...es. The trees adjust to the resulting reduction in photosynthesis by diverting less of the sugar and other carbohydrates that they make to wood production. This finding has important implications for climate change since the amount of carbon removed from the atmosphere during tropical droughts will decrease signifi...

Scientists discover how plants disarm the toxic effects of excessive sunlight

...cells protect themselves from a toxic byproduct of photosynthesis may hold important implications for bioenergy sour...o produces oxygen in its breathable form. However, photosynthesis can also generate an alternate form of singlet oxygen, which is a highly reactive and toxic substanc...

Study reveals new technique for fingerprinting environmental samples

... water there was an abundance of genes involved in photosynthesis in samples collected from shallow water. These differences in the abundances of genes involved in particular functions provide DNA clues to features of the environments from where the samples were taken. Importantly the DNA clues were easy to find de...

Amazon source of 5-year-old river breath

...ropical forests rapidly gulp carbon dioxide during photosynthesis ?were holding onto that carbon for decades, even centuries, says Emilio Mayorga, University of Washington oceanographer and lead author of the Nature piece with Anthony Aufdenkampe of the Stroud Water Research Center in Pennsylvania. As policy make...

Oxygen increase caused mammals to triumph, researchers say

...re samples that go back 205 million years. Because photosynthesis produces oxygen and leaves carbon 13 behind, the p... of shallow seas, the increase in plant life - and photosynthesis - in addition to the consequent increase in oxygen content that gave the mammals the boost they need...

Study casts doubt on 'Snowball Earth' theory

...ovided is the first real evidence that substantial photosynthesis occurred in the Earth's oceans during the extreme ice age 700 million years ago, which is a challenge for the snowball theory." The evidence from the drill core does not prove that large parts of the ocean remained free of sheet ice during the pre-C...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

...in the Earth, unlike ecosystems that are driven by photosynthesis or hot emissions from the planet's crust. Domack and his coauthors propose that methane from deep underwater vents likely provide the energy source capable of sustaining the chemical life at the observed 850-meter [approximately 2800-foot] depth. Su...

Hybrid grass may prove to be valuable fuel source

...oductive, Dohleman and others take measurements of photosynthesis throughout the day. He measures the intensity of t... in a chamber, allowing him to measure the rate of photosynthesis depending upon ambient sunlight. Preliminary results show that Miscanthus has a 27 percent greater r...

Genetic discovery could lead to drought-resistant plants

...e point, both to pick up carbon dioxide needed for photosynthesis and to release oxygen back into the atmosphere. This new information will be important to plant breeders looking to improve crop resistance to drought, as well as to those seeking to understand plants' evolutionary responses to climate, says Campbell...

MSU researchers receive $4 million grant to uncover gene functions

...ast gives green plants their color and carries out photosynthesis and produces oxygen. It can be thought of as the world's life-support system. It is an attractive target for biotechnology because it produces many different molecules important to agriculture and human health, such as vegetable oils, starch for etha...

MERIS monitoring tracks planetary photosynthesis levels

...rithm and powerful Grid computing to reveal global photosynthesis activity on land. This permits researchers to trac...C) in Ispra, Italy is the basis for global monthly photosynthesis maps derived from MERIS imagery. Their production represents a demanding data-processing task only m...

Microbe has huge role in ocean life, carbon cycle

...the food chain and producing oxygen. About half of photosynthesis and the resulting oxygen on Earth are produced by algae in the ocean, and microbes like SAR11 recycle organic carbon - producing the nutrients needed for algal growth. "Ultimately, SAR11 through its sheer abundance plays a major role in the Earth's ...

New markers of climate change

... which grow on other plants) to find out how their photosynthesis and water evaporation have been affected by climat...ulate in the plant over time and are indicators of photosynthesis and water evaporation, respectively. Because the plants are subjected to conditions such as fog and ...

Did humans cause ecosystem collapse in ancient Australia?

... About 85% of plants belong to what is known as C3 photosynthesis group. This group incorporates less 13C than plants belonging to the second most common class, C4. Thus, the differences in 13C that we detected in the eggshells and teeth pointed to the type of plants that were consumed. Although, both types of plan...

New tooth enamel dating technique could help identify disaster victims

...arbon dioxide, which was taken up by plants during photosynthesis and mixed with the oceans. "Because we eat plants and animals that live off plants, the carbon-14 concentration in our bodies closely parallels that in the atmosphere at any one time," he said. Buchholz and his colleagues analyzed 33 teeth from 22 ...

Freeze-dried mats of microbes awaken in Antarctic streambed

...s. "After we diverted the water into the channel, photosynthesis began the same day and the mats became abundant within a week," she said. "This showed us that they had been preserved in a cryptobiotic state." Over the next several years, the microbial mats in the experimental channel had higher growth rates than...

Plants reveal a secret and bring researchers nearer a cleaner future

...ogy for a better use of solar energy. The study of photosynthesis in plants could provide new clues by explaining ho...Facility (ESRF) to investigate the kinetics of the photosynthesis process. They have confirmed the existence of a fifth step in the catalysis process of water into ox...

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