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Latest Photosynthesis Stories

2012-01-26 12:55:34

A new study comparing the carbon-holding power of freshwater wetlands has produced measurements suggesting that wetlands in temperate regions are more valuable as carbon sinks than current policies imply, according to researchers. The study compared several wetlands at two Ohio wetland sites: one composed of mostly stagnant water and one characterized by water regularly flowing through it. The study showed that the stagnant wetland had an average carbon storage rate per year that is almost...

2012-01-25 12:42:36

The upsurge in droughts is one of the main consequences of climate change, and affects crops in particular. However, Anabel Robredo, a biologist at the University of the Basque Country (UPV/EHU), has confirmed that in the case of barley at least, climate change itself is providing it with self-defence mechanisms to tackle a lack of water. Climate change is in fact also responsible for a considerable increase in the concentration of CO2, a gas that, paradoxically, is providing this plant with...

Molecular 'Culprit' Linked To Rise Of Planetary Oxygen
2012-01-11 04:34:18

A turning point in the history of life occurred 2 to 3 billion years ago with the unprecedented appearance and dramatic rise of molecular oxygen. Now researchers report they have identified an enzyme that was the first — or among the first — to generate molecular oxygen on Earth. The new findings, reported in the journal Structure, build on more than a dozen previous studies that aim to track the molecular evolution of life by looking for evidence of that history in present-day...

2011-12-23 08:32:25

The same principle that causes figure skaters to spin faster as they draw their arms into their bodies has now been used by Michigan State University researchers to understand how molecules move energy around following the absorption of light. Conservation of angular momentum is a fundamental property of nature, one that astronomers use to detect the presence of satellites circling distant planets. In 1927, it was proposed that this principle should apply to chemical reactions, but a clear...

2011-12-19 14:26:12

Algal protein gives boost to electrochemical water splitting Water splitting in photo-electrochemical cells to yield hydrogen is a promising way to sustainable fuels. A team of Swiss and US scientists now made major progress in developing highly efficient electrodes — made of an algal protein, thus mimicking a central step in natural photosynthesis. Photosynthesis is considered the «Holy Grail» in the field of sustainable energy generation because it directly converts...

2011-12-15 17:08:35

A generally accepted 44-year-old assumption about how certain kinds of bacteria make energy and synthesize cell materials has been shown to be incorrect by a team of scientists led by Donald Bryant, the Ernest C. Pollard Professor of Biotechnology at Penn State University and a research professor in the Department of Chemistry and Biochemistry at Montana State University. The research, which will be published in the journal Science on 16 December 2011, is expected to help scientists discover...

2011-12-12 22:04:31

Tomato, watermelon prove most efficient at CO2 accumulation Salt can have drastic effects on the growth and yield of horticultural crops; studies have estimated that salinity renders an about one-third of the world's irrigated land unsuitable for crop production. Imbalances in soil salinity can cause ion toxicity, osmotic stress, mineral deficiencies, and drastic physiological and biochemical changes in plants. Salt stress can even cause plants to adjust their water usage–to conserve...

2011-12-12 21:57:59

Treated seedlings are healthier, more vigorous after transplanting The quality of agricultural seedlings is important to crop growth and yield after transplantation. Good quality seedlings exhibit characteristics such as thick stems, thick leaves, dark green leaves, and large white roots. Scientists have long known that plant development and physiology are strongly influenced by the light spectrum, which affects seedling structure. Raising seedlings irradiated with blue light has been...

2011-12-09 11:52:42

Food prices are soaring at the same time as the Earth's population is nearing 9 billion. As a result the need for increased crop yields is extremely important. New research led by Carnegie's Wolf Frommer into the system by which sugars are moved throughout a plant -- from the leaves to the harvested portions and elsewhere -- could be crucial for addressing this problem. Their work is published Dec. 8 by Science Express. Just as it's necessary for the human body to move nutrients to all of...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.