Articles with the keyword:
12

Hey Bud, Spare Some Genes?

piggy submitted, created time 1 week 19 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

7

Ancient Palm Resurrected from 2000-Year-Old Seed

jerry submitted, created time 5 months 1 week (sciencenow.sciencemag.org)

Scientists have successfully grown a date palm from a 2000-year-old seed dug up from the Judean desert. That makes the seed, whose age has just been verified by radiocarbon dating, the oldest ever to germinate.

6

Can a Fir Coat Keep a Tree Warm?

marry submitted, created time 5 months 1 week (sciencenow.sciencemag.org)

An isotopic analysis of wood suggests that firs in northern forests can trap heat and keep their needles warmer than the surrounding air...

6

The Study of Phloem Development and Structure in Arabidopsis

kavin submitted, created time 5 months 2 weeks (www.plantcell.org)

Currently, examination of the cellular structure of plant organs and the gene expression therein largely relies on the production of tissue sections. Here, the authors present a staining technique that can be used to image entire plant organs using confocal laser scanning microscopy. This technique produces high-resolution images that allow three-dimensional reconstruction of the cellular organization of plant organs.

8

Functional analysis of cotton orthologs of GA signal transduction factors GID1 and SLR1

kavin submitted, created time 5 months 3 weeks (www.ncbi.nlm.nih.gov)

As we know, gibberellic acid (GA) is both necessary and sufficient to promote fiber elongation in cultured fertilized ovules of the upland cotton variety Coker 312. The researchers's results indicate that the initiation of fiber elongation by the application of GA to cultured ovules corresponds with increased expression of genes that encode xyloglucan endotransglycosylase/hydrolase (XTH) and expansin (EXP) that are involved in promoting cell elongation.

12

OsDREB1F gene increases salt, drought, and low temperature tolerance in both Arabidopsis and rice

kavin submitted, created time 6 months 6 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.

10

Involvement of CBF Transcription Factors in Winter Hardiness in Birch

kavin submitted, created time 6 months 6 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.

11

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

16

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

7

Shocks make plants produce more chemicals

Sue Wu submitted, created time 7 months 3 weeks (www.nature.com)

A few milliamps of electricity can cause plants to increase synthesis of chemicals.
It seems to be kinds of conditioned reflex.

5

"SUN" controls fruit shape

Sue Wu submitted, created time 8 months 2 days (www.sciencedaily.com)

Crop scientists have cloned a gene that controls the shape of tomatoes, a discovery that could help unravel the mystery behind the huge morphological differences among edible fruits and vegetables as well as provide new insight into mechanisms of plant development.

9

DNA barcoding for botanical identities

jane2007 submitted, created time 9 months 2 weeks (www.nature.com)

Researchers have used a DNA sequence to distinguish between more than 1,600 botanical samples from two biodiversity hotspots, providing the largest test yet of "DNA barcoding" in plants.

9

Genetic discovery can boost the provitamin A content of Africa's maize

jane2007 submitted, created time 10 months 1 day (www.news.cornell.edu)

A new discovery could change health disorders caused by lack of provitamin A. Using genetic and statistical tools, researchers have identified a set of genetic variants in maize that accounts for levels of vitamin A precursors among varieties.

5

A Parasite Shows Its Plantlike Side

Sue Wu submitted, created time 10 months 1 week (sciencenow.sciencemag.org)

Researchers now report that one animal-like, parasitic protozoan relies on a biochemical pathway that is strikingly plantlike. The discovery could open up a new method of attacking protozoans that cause diseases such as malaria.

6

Researchers Prove How Plants Transport Sugars

Eric wu submitted, created time 10 months 2 weeks (www.sciencedaily.com)

How do many plants ship sugars from their leaves to flowers, roots, fruits and other parts of their structure? Using genetic engineering techniques, Cornell researchers have finally proven a long-standing theory of how this occurs.

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