Tag: "root" at biology news

Mothers' depression may induce earlier puberty in daughters

...y accelerating pubertal development may have taken root during human evolution, as a reproductive strategy, the researchers suggest. "Over the course of our natural selective history, ancestral females growing up in adverse family environments with uncertain futures may have reliably increased their repr...

Gene tracking follows cells from embryo to adult

...he cells shown by Chai and colleagues to be at the root of forming teeth, jaws, and other body parts are called neural crest, named for their site of origin. When the embryo is little more than an elongated blob, a thickened band of cells forms along the dorsal surface. This "neural plate" of cells is t...

Diversity of trees in forests may be caused by soil pathogens, IU biologists find

... way for unaffected seeds of other species to take root and flourish near that tree, thereby promoting diversity of trees in forests, according to a study published in the March 16 issue of the journal Nature by Indiana University biologists Alissa Packer and Keith Clay. The study is described in an arti...

Tobacco farm workers may contract tobacco sickness, Wake Forest study shows

...ng plants, usually 4-6 feet in height, to increase root growth, leaf weight and nicotine content. "Absorption increases with the amount of skin exposed and with skin damage or disease," she said. Because the work is done on the hot, humid days of summer, workers are more likely to work shirtless. The pr...

Nonchemical weedkiller has huge potential; hungriest nations may benefit thanks to McGill plant scientists

.... Watson. The weed compensates for its own lack of root system by penetrating the roots of other plants and stunting their growth. Dr. Watson and his colleagues evaluated 250 organisms and were gratified to find that the Fusarium pathogen attacked the seeds as well as the plant. The next challenge...

Magnetic resonance imaging of sexual intercourse is both possible and useful...

...elvis during intercourse, thepotential size of the root of the penis and the capacity of the penis in erec...tion to be at an angle ofaround 120 degrees to the root of the penis, enables penetration almost parallel to the woman's spine. The authors conclude that t...

NYU researchers find that genetically engineered corn releases insecticidal toxin into soil

...ief communication entitled, "Insecticidal toxin in root exudates from Bt corn." Bt corn is corn that ha...e was too large to be released through the plant's root system. Recently it was shown that the toxin is also present in the pollen of Bt corn and that when...

Penny wise and pound-foolish: Study shows need for second pathologist's opinion

...rden for overworked clinicians." But the root of the misdiagnoses, he explains, may be advances in technology -- the needle biopsies, PSAs and improved radiology made to nip conditions in the bud. "With earlier diagnosis of suspect tissue, it's now much more difficult, for example, to separate ...

Understanding key protein in Fragile X syndrome

...s may finally get a handle on how mutant FMRP the root molecular cause of Fragile X syndrome causes mental retardation. Initially, Warren's group isolated the proteins from cultured connective tissue cells. While people with Fragile X syndrome sometimes have connective tissue abnormalities, their mental...

DBI News: Plant microbe interactions and nutrient use to be explored Nov. 16 at UD

...ans or peanuts that naturally form nitrogen-fixing root nodules." The symbiotic relationship between plant roots and soil bacteria is key to Sherrier's research. Her upcoming presentation, "Proteomic Analysis of Plant Membrane Proteins," will take place from 12:30 -1:30 p.m. in Room 214, Brown Laboratory,...

Unveiling all of the consequences: Introduced plants may be causing hidden trouble

...boveground shoots, while maintaining only a meager root system. Conversely, the native grasses do not grow as tall, but instead develop an extensive network of roots. Previous studies have shown that roots play a more important role than do shoots in enriching the ground with nutrients and organic matter...

Scientists create smart mouse

... and reveals a common biochemical mechanism at the root of nearlyall learning. It shows that the brain uses the same basic tool when it formsassociations, even though parts of the brain work in specialized ways and dealwith diverse types of information, such as sights, sounds and touch. The resultgives s...

Team of 200 scientists presents new research that reveals full 'tree of life' for plants

... the oceans and survived on land. Even at the very root of thegreen plant family tree, only one line leads to today's living green plants,according to Mishler. "Plants came out onto land probably many times, but only one lineage actuallymade it," said Mishler. "This indicates there's an Eve -- a common an...

Colorado State experiment aboard space shuttle Columbia will show how plants detect gravity; May help grow them on long-term missions

...happens at themolecular level that tells a plant's root to grow down and a shoot to growupward. It's an im...ghtless conditionknown as microgravity. "A root always grows down, a process known as gravitropism, which meansroot cells have some mechanism to kno...

$6.75 Million to extend primate studies of diet and aging

... cascade ofcellular events that may be at the very root of the aging process....

Agronomists offer alternative approaches to gulf pollution

...ix weeks in the springbecause it allows an aerobic root zone for seed development. Beyond that itseffectiv...o thewater that the crops need may move out of the root zone." Turco suggests that farmers consider modifying their systems so that theytrap wat...

Earliest Modern Tree Lived 360-345 Million Years Ago

...ems. It was the first plant toproduce an extensive root system, so had a profound impact on soil chemistry.And once these ecosystem changes happened, they were changed for all time. Itwas a one-time thing. "Archaeopteris made the world almost a modern world in terms of ecosystems thatsurround us now," Sc...

Fishermen Are Killing Brown Pelicans With Kindness

...umans are the pelicans' main threat. "We're at the root of the problem," said Kelton, whose seabird station isalso supporting the educational campaign. "There aren't any wild placesleft in Florida; we're surrounded by condominiums and sea walls, andpelican habitat is the prime habitat for building condomi...

Plants Use 'Snorkels' To Survive Floods

...aving oxygen through the stalks and roots to their root tips. Up to now, it has been unclear why certain species are capable of triggering this adaptive reaction while other closely related ones are not. The Dutch biologists hope to unravel this process of underwater growth at the physiological and mol...

Trees Need Calcium Too

...t floor (thenutrient rich organic soil layer where root activity is greatest) by root uptakeand water movement. The result is that aluminum replaces calcium and the treeshave a harder ti...

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