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Tag: "tolerant" at biology news

Caribbean frogs started with a single, ancient voyage on a raft from South America

...swimming because frogs dry easily and are not very tolerant of salt water. In addition to the study's discoveries about Caribbean and Central American frogs, the research also revealed and defined an unusually large and unpredicted group of species in South America. "The South American group may have more...

Ancient genes used to produce salt-tolerant wheat

...d to include bread wheat. "Bread wheat is quite tolerant to salt, but we think it too can be improved. Our ... world's arable land is affected by salinity. Salt tolerant crops can provide farmers with income for remediation, as well as helping to stabilise soil from win...

How fish species suffer as a result of warmer waters

... large seasonal temperature fluctuations, are more tolerant to higher temperatures and display wider thermal windows than, for instance, fishes from polar regions living at constant low temperatures. The latter are able to grow and reproduce only within a very limited thermal tolerance window. Investigatio...

Scientists use an 'ice lolly' to find polar bacteria in their own backyard

... is not only ice-forming, it is also thought to be tolerant to cold and could therefore have advantages for snow-making in artificial environments such as ski centres and in waste-water purification. "Selecting for rare microbes that seem to stick to ice has been fun, but now the real work begins to find out...

Salk scientists get to the root of plant cell fate

... in terms of polarity development is how much more tolerant plants are of manipulation. Long says, "In animals, early cell divisions are very important to development of polarity and if something goes awry with co-repressors, the animal quickly dies. But in plants, polarity can be changed much later in embryo...

New flood-tolerant rice offers relief for world's poorest farmers

...sin India. The resulting rice plants were not only tolerant of beingsubmerged in water but also produced high yields and retained otherbeneficial crop qualities. Development of submergence-tolerantvarieties for commercial production in Laos, Bangladesh and India isnow well under way. In addition to providin...

Researchers develop flood-tolerant California rice

...ubmergence intolerant line and the new submergence tolerant line. A careful comparison of the two California rice lines showed that in the submergence tolerant line the rice plants orchestrate a number of cellular responses to submergence that are controlled b...

Obese people are more sensitive to pain, suggests study

...lts. "Some studies say that obese people are more tolerant of pain, while other studies say they are less tolerant," Emery said. About a third of the study's 62 participants were obese. Researchers determined who was obese based on participants' body mass index (BMI) scores, which relates height to weight. ...

Alternatives to the use of nitrate as a fertiliser

...bolism of sensitive plants, such as spinach and on tolerant ones, like the pea. The results indicate that the ...ver, this reaction can favour the growth of plants tolerant to ammonium in another situation of added stress. The researchers have shown that tolerance to ...

Climate change: The rice genome to the rescue

...ging new areas. "We need to develop rice varieties tolerant of higher temperatures that can maintain yield and quality when extreme temperatures occur," Dr. Sheehy said. "We also need rice varieties that can take advantage of higher levels of CO2 in the atmosphere, rice that is vigorous enough to recover quic...

Ocean 'dead zones' trigger sex changes in fish, posing extinction threat

...ning and nursery grounds of fish. Even though some tolerant species can survive in hypoxic zones, they may not be able to migrate out of the zone and their reproduction will be impaired." Hypoxia is considered one of the most serious threats to marine life and genetic diversity, Wu says. It occurs when exce...

Hot-spring bacteria flip a metabolic switch

...ajor N2 fixers in microbial mats. But they are not tolerant of extremely high temperatures, and only live at the cooler edges of the mat, raising the question of whether N2 fixation was critical for organisms in the hotter regions of the mat. Because heat tolerant, single-celled cyanobacteria like Synechococc...

A bug's life: Exceptional genomic stability yet rapid protein evolution in a carpenter ant mutualist

... the scientists, endosymbiont proteins may be more tolerant of amino acid changes when they first become associated with their hosts, and this may account for the rapid rates of protein evolution observed. In addition, protein sequences of the two Blochmannia species exhibited different rates of evolution; d...

Shade trees getting 'scorched' by plant disease

...vere state of decline should also be removed. Use tolerant plants. In areas where BLS occurs, avoid planting highly susceptible trees, and design new tree plantings with a diverse complement of tree species. More on the symptoms of BLS and disease management options is available in this month's APSnet fea...

Scientists crack 40-year-old DNA puzzle and point to 'hot soup' at the origin of life

...e of the older theories can explain how this error tolerant structure might have arisen." The new theory also highlights two amino acids that can be excluded from the doublet system and are likely to be relatively recent 'acquisitions' by the genetic code. As these amino acids - glutamine and asparagine - ar...

A radical solution for environmental pollution

...er bacteria that are more easily cultured and more tolerant of various environmental conditions. He'd also like to coax T. aromatica into neutralizing other kinds of pollutants, but the first step is understanding exactly how the bug breaks down toluene. "The challenge is that the chemical reactions these ba...

Study uncovers bacteria's worst enemy

...esistant the bacteria are to chemicals than to how tolerant they are to radioactivity. The results of a recent Laboratory study may help make bacterial bioremediation a more widespread method for cleaning up sites contaminated with actinides and other radionuclides. In research published in the journal Envir...

Transgenic plants remove more selenium from polluted soil than wild plants, new tests show

...ickly -- up to six to seven feet tall -- and it is tolerant to many toxic conditions. It's a good plant for re...lants. Moreover, the GS plants seemed particularly tolerant of the contaminated soil, growing 80 percent as well as the GS plants planted in clean soil. Becaus...

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