Plant news from around the world

Step toward a new sunscreen? Plant agents show promise in preventing skin cancer

ScienceDaily Botany News - Tue, 08/31/2010 - 07:00
Ongoing research finds that a blend of plant substances -- such as resveratrol and grape seed extract -- can prevent skin cancer in mice.

Core knowledge of tree fruit expands with apple genome sequencing

ScienceDaily Botany News - Mon, 08/30/2010 - 01:00
An international team of scientists from Italy, France, New Zealand, Belgium and the US have published a draft sequence of the domestic apple genome. The sequence will allow scientists to more rapidly identify which genes provide desirable characteristics to the fruit and which genes and gene variants provide disease or drought resistance to the plant. This information can be used to rapidly improve the plants through more informed selective breeding.

Lethal backfire: Green odor with fatal consequences for voracious caterpillars

ScienceDaily Botany News - Fri, 08/27/2010 - 16:00
During field studies, scientists discovered that the oral secretions of tobacco hornworm larvae contain a particular substance that promptly alters a green leaf volatile in tobacco leaves into an odor attractant signal. With this signal, called (E)-2-hexenal, they unintentionally lure their own enemies: carnivorous bugs. These bugs start their piercing attacks not only against freshly hatched caterpillar babies; they also devour eggs laid by the female moths.

On organic coffee farm, complex interactions keep pests under control

ScienceDaily Botany News - Fri, 08/27/2010 - 13:00
Proponents of organic farming often speak of nature's balance in ways that sound almost spiritual, prompting criticism that their views are unscientific and naive. At the other end of the spectrum are those who see farms as battlefields where insect pests and plant diseases must be vanquished with the magic bullets of modern agriculture: pesticides, fungicides and the like.

Novel mechanism protects plants against freezing; Insights could add to understanding of drought tolerance also

ScienceDaily Botany News - Fri, 08/27/2010 - 04:00
New nesearch helps explain how plants protect themselves from freezing temperatures and could lead to discoveries related to plant tolerance for drought and other extreme conditions.

Burning invasive juniper trees boosts perennial grass recovery

ScienceDaily Botany News - Thu, 08/26/2010 - 23:00
Controlling juniper trees by cutting them down and burning them where they fall keeps invasive cheatgrass at bay and allows native perennials to become re-established, according to new findings.

Growing drought-tolerant crops inching forward

ScienceDaily Botany News - Wed, 08/25/2010 - 22:00
A team of scientists has used the tools of structural biology to understand how a synthetic chemical mimics abscisic acid (ABA), a key stress hormone that helps plants cope with adverse environmental conditions such as drought.

Fires and floods key to dinosaur island secrets

ScienceDaily Botany News - Tue, 08/24/2010 - 19:00
Fires and floods which raged across the Isle of Wight some 130 million years ago made the island the richest source of pick ’n’ mix dinosaur remains of this age anywhere in the world. A new study has revealed the Island’s once violent weather explains why thousands of tiny dinosaur teeth and bones lie buried alongside the huge bones of their gigantic relatives.

Plants give up some deep secrets of drought resistance

ScienceDaily Botany News - Tue, 08/24/2010 - 04:00
In a study that promises to fill in the fine details of the plant world's blueprint for surviving drought, a team of researchers has identified in living plants the set of proteins that help them withstand water stress.

Mosquitoes: Genetic structure of first animal to show evolutionary response to climate change determined

ScienceDaily Botany News - Mon, 08/23/2010 - 23:00
Scientists have determined the fine-scale genetic structure of the first animal to show an evolutionary response to rapid climate change.

Sensor important to understanding root, seedling development

ScienceDaily Botany News - Sun, 08/22/2010 - 23:00
A biosensor utilizing black platinum and carbon nanotubes will help give scientists a better understanding of how the plant hormone auxin regulates root growth and seedling establishment.

Drought drives decade-long decline in plant growth

ScienceDaily Botany News - Sat, 08/21/2010 - 07:00
Global plant productivity that once was on the rise with warming temperatures and a lengthened growing season is now on the decline because of regional drought, according to a new study of NASA satellite data.

Smart fungus disarms plant, animal and human immunity

ScienceDaily Botany News - Fri, 08/20/2010 - 19:00
Fungal and bacterial pathogens are well capable of infecting plants, animals and humans despite their immune systems. Fungi penetrate leafs, stalks and roots, or skin, intestines and lungs, to infect their hosts. Researchers have now discovered how this is possible. They found that the fungus secretes a protein that makes stray building blocks of the fungal cell wall invisible for the immune system of the plant. In this way infection remains unnoticed.

Mapping out pathways to better soybeans

ScienceDaily Botany News - Fri, 08/20/2010 - 19:00
Agricultural scientists are a step closer to unlocking genetic clues that may lead to packing more protein and oil into soybeans, a move that would boost their value and help US growers compete in international markets.

How the storehouses of plant cells are formed

ScienceDaily Botany News - Fri, 08/20/2010 - 04:00
Researchers have shown for the first time that a specific protein plays an indispensable role in the formation of vacuoles, by far the largest organelles in plant cells. Enveloped by a membrane, vacuoles store substances vital for the plant cell and in many cases important to humans as well. Until now, scientists have only vaguely understood how these vacuoles are formed or how the substances stored inside them get there.

New genetic tool helps improve rice

ScienceDaily Botany News - Thu, 08/19/2010 - 22:00
Scientists have developed a new tool for improving the expression of desirable genes in rice in parts of the plant where the results will do the most good.

Biologists study rainforest host-plant associations

ScienceDaily Botany News - Wed, 08/18/2010 - 23:00
The widening of the Panama Canal currently underway has created a rare opportunity to study the insects that inhabit the plants of environmentally sensitive Central American rainforest habitats. A new research effort there could shed light on biodiversity by documenting the area's host-plant relationships.

Screening crop plants for toxins

ScienceDaily Botany News - Wed, 08/18/2010 - 22:00
Scientists are working on a way to screen crop plants for toxic accumulation. Many plants, in response to predators or herbivores, release hydrogen cyanide to defend themselves. The new genetic screen for plants lacking this ability will be particularly useful for crops grown in tropical and sub-Saharan Africa.

Exploring Kenya's sky island

Plant news from Mongabay - Wed, 08/18/2010 - 17:17
Rising over 2,500 meters from Kenya's northern desert, the Mathews Range is a sky island: isolated mountain forests surrounded by valleys. Long cut off from other forests, 'sky islands' such as this often contain unique species and ecosystems. Supported by the Nature Conservancy, an expedition including local community programs Northern Rangelands Trust and Namunyak Conservancy recently spent a week surveying the mountain range, expanding the range of a number of species and discovering what is likely a new insect.

Can cloned plants live forever?

ScienceDaily Botany News - Wed, 08/18/2010 - 04:00
Despite the many cosmetic products, surgical treatments, food supplements, and drugs designed specifically to reverse the biological effects of aging in humans, long-lived aspen clones aren't so lucky. Researchers have shown that as long-lived male aspen clones age, their sexual performance declines.
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