77 Articles with the topic: Plant Biology
The relationship between plant species diversity and its productivity
sea-maid submitted, created time 6 months 3 weeks (www.pnas.org)
Plant species diversity has a high effect on productivity in natural settings. In this article, they found that aboveground net primary production increased with the number of plant species. They point out that the effect of biodiversity in natural ecosystems may be much larger than currently thought 
Chemical from Medicinal Plants May Be Used to Fight HIV
piggy submitted, created time 3 days 22 hours (www.sciencedaily.com)
Like other kinds of cells, immune cells lose the ability to divide as they age because a part of their chromosomes known as a telomere becomes progressively shorter with cell division. As a result, the cell changes in many ways, and its disease fighting ability is compromised.
But a new UCLA AIDS Institute study has found that a chemical from the Astragalus root, frequently used in Chinese herbal therapy, can prevent or slow this progressive telomere shortening, which could make it a key weapon in the fight against HIV
Mars soil capable of sustaining plant life
sea-maid submitted, created time 4 months 3 weeks (www.latimes.com)
Surprisingly alkaline, the soil on Mars it could support green beans and asparagus, say Phoenix mission scientists, who are "flabbergasted" by the findings.
Ginkgo Biloba Does Not Reduce Dementia Risk, Study Shows
piggy submitted, created time 2 days 1 hour (www.sciencedaily.com)
The medicinal herb Ginkgo biloba does not reduce the risk of dementia or Alzheimer's disease development in either the healthy elderly or those with mild cognitive impairment, according to a large multicenter trial led by researchers at the University of Pittsburgh School of Medicine.
Findings from the Ginkgo Evaluation of Memory (GEM) Study, which is the first to have the necessary participant numbers and monitoring years to enable measurement of G. biloba's effectiveness and safety profile in dementia prevention, were just published in the Journal of the American Medical Association
Food crisis calls for renewed vigor in agricultural research
Darkfrog submitted, created time 6 months 2 weeks (www.nature.com)
Agricultural research may not sound flashy--it includes everything from high-yield crop varieties to pest and weed control--but experts claim that a lack of it is the underlying cause of our current food shortages in the developing world, and that it is likely to be the cause of future shortages if the problem is not corrected.
While there is a focus on agricultural research in the developing world, this is limited to four countries: China, Brazil, South Africa and India. At the same time, there is less and less transfer of technology and information from first-world countries like the U
OsDREB1F gene increases salt, drought, and low temperature tolerance in both Arabidopsis and rice
kavin submitted, created time 6 months 5 days (www.ncbi.nlm.nih.gov)
In this study, a novel rice DREB transcription factor, OsDREB1F, was cloned and characterised via subtractive suppression hybridisation (SSH) from upland rice. The further characterisation of OsDREB1F-overexpressing Arabidopsis showed that, besides activating the expression of COR genes which contain DRE/CRT element in their upstream promoter regions, the expression of rd29B and RAB18 genes were also activated, suggested that OsDREB1F may also participate in ABA-dependent pathways.
piggy submitted, created time 6 days 22 hours (sciencenow.sciencemag.org)
A common European weed has turned its compact flower into an expansive, yellow-petalled blossom by borrowing a couple of genes from a close Italian relative. Researchers say the exchange is a rare documented example of beneficial genetic flow between species. It also challenges the notion that higher organisms must rely on their own genes to evolve.
The story starts three hundred years ago, when botanists introduced a yellow Sicilian flower called Senecio squalidus to Oxford, U.K. At the time, there was only one variety of a British weed known as the common groundsel (S
Genetically Modified Corn May Be Banned in Europe
jane2007 submitted, created time 11 months 4 weeks (www.nytimes.com)
European Union environmental officials have determined that two kinds of genetically modified corn could harm butterflies, affect food chains and disturb life in rivers and streams, and they have proposed a ban on the sale of the seeds.
worldwide database of tree DNA created
kavin submitted, created time 6 months 2 weeks (edition.cnn.com)
The researchers of New York Botanical Garden are about to lead a global effort to capture DNA from thousands of tree species from around the world. Their resulting database will help identify many of the world's existing plant species, where they are located and whether they are endangered. The results are crucial for conservation and protecting the environment as population and development increases
AVR2, a fungal effector protein targets diversifying defense-related cys proteases of tomato
kavin submitted, created time 6 months 2 weeks (www.ncbi.nlm.nih.gov)
In this paper, secretion of protease inhibitor AVR2 by C. fulvum during infection suggests that tomato papain-like cysteine proteases (PLCPs) are part of the tomato defense response. They show that the tomato apoplast contains a remarkable diversity of PLCP activities with seven PLCPs that fall into four different subfamilies.
Could global gardening fix climate change?
jane2007 submitted, created time 10 months 1 week (www.nature.com)
According to a new analysis, using biomass fuel on a massive scale in combination with carbon sequestration could return atmospheric carbon dioxide to pre-industrial levels within decades Peter Read calls his proposal global gardening. Is it will work, I doubt.
How to Keep a Wasp from Cheating
Vincent submitted, created time 8 months 6 days (sciencenow.sciencemag.org)
It would be easy for fig wasps to cheat. These tiny insects pollinate figs in exchange for a share of the tree's seeds--and theoretically, the wasps could lay claim to more seeds than they deserve. But they don't, and now biologists know why. Parasitic wasps, usually thought of as the bad guys, keep the pollinators honest.
Leaf clippings as protein factories
kavin submitted, created time 6 months 3 weeks (www.sciencenews.org)
Traditionally, if researchers want to produce some proteins such as vaccinum，they need to develop a genetically modified plant first and getting government approval can take years. This new technique could induce plant leaves to mass-produce custom proteins in a matter of weeks. The plant cells could make virtually any kind of protein, including antigens for rapid production of vaccines against new viruses. Best of all, because this does not involve genetically engineering the entire plant, the approval process is expectede to be much simpler.
Involvement of CBF Transcription Factors in Winter Hardiness in Birch
kavin submitted, created time 6 months 5 days (www.ncbi.nlm.nih.gov)
Cold acclimation of plants involves extensive reprogramming of gene expression. And in the paper, the researchers suggest that in addition to their role in cold acclimation during the growing season birch CBFs appear to contribute to control of winter hardiness in birch.
Biotechnology: Can hydrogels solve our water problem?
Darkfrog submitted, created time 2 months 1 week (www.nature.com)
I remember reading BIll Bryson's description of a pre-blight American chestnut tree. When he came to the transpiration of water, he said, "imagine how much metal and noise humans would have to use to move that many gallons water."
Well artificial water transport just got a bit quieter, even if it can't match the chestnut just yet. A tiny microtree made from the same type of gel used to make contact lenses has mimicked water transport in plants. Scientists say that it could be used to extract water in dry places or make more efficient cooling systems
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