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Tag: "dwarf" at biology news

Deficiency of growth hormone and IGF-1 reduces cancer and kidney disease, but creates other problems

...t lifespan. The researchers developed a strain of dwarf rats that were naturally deficient in both growth hormone and in IGF-1. To mimic the rise in growth hormone and IGF-1 during adolescence in normal rats, some of these deficient rats were given growth hormone while they were between 4 and 14 weeks of ...

Suppressing growth hormone in early adulthood may prevent cancer

...hemical carcinogen. But Sonntag said that if these dwarf rats are given growth hormone to increase IGF-1 in the blood, tumors develop at the same rate as in the normal animals. Suppression of IGF-1 activity inhibits the proliferation of numerous cell types and cancers. "IGF-1 levels in the blood can be re...

Trio of plant genes prevent 'too many mouths'

...utting them all out of action ?the researchers got dwarf plants an inch high instead of the normal 1½ feet. Surprisingly the plants also were so densely covered with stomata that most stomata were touching each other. These genes appear to have roles at two points in the production of stomata. First, they...

Not just the birds

...s -- or grasses -- out-competed the slower growing dwarf shrubs and forbs. The islands with foxes had more dwarf shrubs and forbs, while those with no foxes were dominated by grasses. Even when researchers took i...

'Scent of a woman' tells male redback spiders to find a mate

...widow spiders and the marble-sized female redbacks dwarf the males, who are about the size of a grain of rice. While the females can live for up to two years, males live for only four to eight weeks. Initially, they remain on the web where they were born, but soon disperse when wind conditions are appropri...

First surveys of Tanzanian mountains reveal 160+ animal species, including new & endemic

...s. The phototraps captured mammals like a Mountain dwarf galago (Galagoides orinus) and a red duiker (Cepha...range. Among these eleven species are the Mountain dwarf galago, two chameleons, the checkered elephant shrew (Rhynchocyon cirnei) and several birds. The Eas...

No-mow grass may be coming to your yard soon

...hat grow in specified ways. "We might be able to dwarf grass and keep it green by limiting brassinosteroids or increase the yield of rice by having more brassinosteroids in seeds," Chory said. Another recent study by Makoto Matsuoka's group in Japan, she said, showed that limiting brassinosteroids in ric...

Study suggests evolutionary link between diet, brain size in orangutans

... that the small-brained specimen represented a new dwarf early human species that somehow survived until fairly recently. Critics argue that it actually is a modern human afflicted with microcephaly, a genetic disorder characterized by an abnormally small head and an underdeveloped brain. ...

New dwarf buffalo discovered by chance in the Philippines

...s turned out to be an extremely unusual species of dwarf water buffalo, now extinct. The new species, des...evolved from a large-sized continental ancestor to dwarf size in the oceanic Philippines, is the first well-supported example of "island dwarfing" among catt...

Researchers learn what sparks plant growth

... originates in the epidermis by experimenting with dwarf Arabidopsis plants and the expression of brassinos...ressed and taken up by receptors in the epidermis, dwarf plants grew to their full size. Savaldi-Goldstein and Chory also found that when a gene is expressed...

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