News tagged with leave
New technique lights up the creation of holograms
Researchers at the RIKEN Advanced Science Institute (Japan) have developed a unique way to create full-color holograms with the aid of surface plasmons.
Mar 19, 2012 |
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Making a light-harvesting antenna from scratch
(PhysOrg.com) -- Sometimes when people talk about solar energy, they tacitly assume that we're stuck with some version of the silicon solar cell and its technical and cost limitations. Not so.
Nov 29, 2011 |
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Trees evolved camouflage defense against long extinct predator: First evidence of camouflage defense in plants
(PhysOrg.com) -- Many animal species such as snakes, insects and fish have evolved camouflage defences to deter attack from their predators. However research published in New Phytologist has discovered that t ...
Jul 22, 2009 |
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First step to converting solar energy using 'artificial leaf'
An international team of researchers has modified chlorophyll from an alga so that it resembles the extremely efficient light antennae of bacteria. The team was then able to determine the structure of these light antennae. ...
Jun 29, 2009 |
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Extra pores on plants could ease global warming: Japan study
Japanese researchers said Thursday they had found a way to make plant leaves absorb more carbon dioxide in an innovation that may one day help ease global warming and boost food production.
Dec 10, 2009 |
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First rainforests arose when plants solved plumbing problem
A team of scientists, including several from the Smithsonian Institution, discovered that leaves of flowering plants in the world's first rainforests had more veins per unit area than leaves ever had before. ...
May 03, 2011 |
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Gold nanoparticles that make leaves glow in the dark
(PhysOrg.com) -- Researchers in Taiwan think they may eventually be able to replace street lamps with trees laced with gold nanoparticles that turn their leaves into bio-light-emitting diodes.
Nanotechnology / Nanomaterials
Oct 25, 2010 |
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Desert rhubarb -- a self-irrigating plant
Researchers from the Department of Science Education-Biology at the University of Haifa-Oranim have managed to make out the "self-irrigating" mechanism of the desert rhubarb, which enables it to harvest 16 ...
Jul 01, 2009 |
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Far-out photosynthesis
Photosynthesis maintains Earth's habitability for life as we know it, and shapes the way we search for habitable worlds around distant stars. Scientists have discovered a microbe that can use low-energy light ...
Mar 16, 2012 |
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Cyborgs needed to save species
As the growing global population continues to increase the burden on the Earth’s natural resources, some historians and scientists think humans should prepare to colonize space. The problem is, we may have ...
Space & Earth / Space Exploration
Sep 16, 2010 |
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Why are autumn leaves red in America and yellow in Europe?
Walking outdoors in the fall, the splendidly colorful leaves adorning the trees are a delight to the eye. In Europe these autumn leaves are mostly yellow, while the United States and East Asia boast lustrous ...
Aug 13, 2009 |
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Colorful leaves: New chlorophyll decomposition product found in Norway maple
(PhysOrg.com) -- Autumn is right around the corner in the northern hemisphere and the leaves are beginning to change color. The cause of this wonderful display of reds, yellows, and oranges is the decomposition ...
Oct 10, 2011 |
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Leafy social network: Scientists study how stomata communicate
(PhysOrg.com) -- To survive, leafy plants need to take in as much carbon dioxide as possible through pores in their leaves without losing water. Known as stomata, these pores somehow work together, processing ...
Nov 22, 2011 |
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Making its predators tremble: Multiple defenses act synergistically in aspen
If plants did not defend themselves in some way, they would certainly be gobbled up by a whole suite of voracious predators ranging from little insects to large mammalian herbivores. Indeed, not only do plants defend themselves, ...
Apr 23, 2010 |
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Leaves whisper their properties through ultrasound
The water content of leaves, their thickness, their density and other properties can now be determined without even having to touch them. A team of researchers from the CSIC Institute of Acoustics and the ...
Feb 03, 2010 |
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Leaf
In botany, a leaf is an above-ground plant organ specialized for photosynthesis. For this purpose, a leaf is typically flat (laminar) and thin. There is continued debate about whether the flatness of leaves evolved to expose the chloroplasts to more light or to increase the absorption of carbon dioxide. In either case, the adaption was made at the expense of water loss. In the Devonian period, when carbon dioxide concentration was at several times its present value, plants did not have leaves or flat stems. Many bryophytes have flat, photosynthetic organs, but these are not true leaves. Neither are the microphylls of lycophytes. The leaves of ferns, gymnosperms, and angiosperms are variously referred to as macrophyll, megaphylls, or euphylls.
Leaves are also the sites in most plants where transpiration and guttation take place. Leaves can store food and water, and are modified in some plants for other purposes. The comparable structures of ferns are correctly referred to as fronds. Furthermore, leaves are prominent in the human diet as leaf vegetables.
For more information about Leaf, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
