Skip to main content

Home/ RIS IB Biology/ Group items tagged plant

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
Sasicha Manupipatpong

Identical DNA codes discovered in different plant species - 2 views

www.sciencedaily.com/...120409164426.htm

plant species identical DNA sequences medicine

shared by Sasicha Manupipatpong on 16 Apr 12 - No Cached
  • found identical sequences of DNA located at completely different places on multiple plant genomes
  • Although the scientists found identical sequences between plant species, just as they did between animals, they suggested the sequences evolved differently.
  • find identical sequences in plant DNAs
  • ...9 more annotations...
  • identical sections weren't found at the same points
  • genomes of six animals (dog, chicken, human, mouse, macaque and rat)
  • six plant species (Arabidopsis, soybean, rice, cottonwood, sorghum and grape)
  • found long strings of identical code in different species of animals' DNA
  • expect to see convergent evolution, but we don't
  • Plants and animals are both complex multi-cellular organisms that have to deal with many of the same environmental conditions, like taking in air and water and dealing with weather variations, but their genomes code for solutions to these challenges in different ways
  • could help in the development of new medicines
  • used to find identical sequential patterns in an organism's entire set of proteins
  • lead to finding new targets for existing drugs or studying these drugs' side effects
  • Sasicha Manupipatpong on 16 Apr 12
     
    A computer algorithm found identical sequences of DNA in different places of various plant species' genomes. The same has been found in animals. This could prove to be beneficial in the development of new medicines (for testing drug side effects).
Rafael Chen

Plant Geneticist Identifies Drought-Tolerant Gene - 2 views

www.sciencedaily.com/...981028144738.htm

shared by Rafael Chen on 16 Apr 12 - No Cached
  • isolation of the gene that controls drought tolerance in plants
  • enable a plant's leaves to stay green long after the last watering
  • plant hormone abscisic acid triggers the closure of the plant's stomata
  • ...3 more annotations...
  • controlled by the ERA1
  • By suppressing the gene -- and thereby keeping the stomata closed -- he found it is possible to control water loss so plants last longer
  • useful in applications such as the cut flower industry
  • Rafael Chen on 16 Apr 12
     
    Genetically engineering plants with a drought resistant gene may be beneficial in creating plants whom leaves would stay green long after the last watering.
Rafael Chen

New Plant Mutation Produces Tap Root With Large Amounts Of Oil, Proteins, And Starch - 1 views

www.sciencedaily.com/...970707211536.htm

shared by Rafael Chen on 15 Apr 12 - No Cached
  • The discovery could lead to genetically engineered plants that store commercially useful substances in an enlarged root
  • The pickle mutation mimics what happens in seeds, which typically are the major structures accumulating and storing proteins and oil
  • In this mutation the cells destined to become primary root cells retain the character of embryonic cells
  • ...2 more annotations...
  • They fail to make the switch from embryonic to adult
  • The mutation has its greatest effect when gibberellin is not present during the first 24 hours of growth
  • Rafael Chen on 15 Apr 12
     
    A mutation in plants that makes the tap root accumulate large amounts of oils, proteins, and starch was discovered by scientist, this could lead to genetically engineered plants that store commercially useful substances in an enlarged root.
wasin kusakabe

Direct transfer of plant genes from chloroplasts into the cell nucleus: Gene function p... - 0 views

www.sciencedaily.com/...120413121916.htm

Genes Chloroplasts Cell Nucleus DNA

shared by wasin kusakabe on 14 Apr 12 - No Cached
  • Chloroplasts, the plant cell's green solar power generators, were once living beings in their own right.
  • This changed about one billion years ago, when they were swallowed up but not digested by larger cells.
  • either direct transport in the form of DNA fragments from the chloroplasts to the nucleus or transport in the form of mRNA, which is then transcribed back into DNA.
  • ...5 more annotations...
  • Genes consist of several modules, separated by non-coding DNA regions (introns).
  • It was found that the transfer takes place without the involvement of RNA and that the DNA apparently jumps directly from the cell's chloroplasts into its nucleus.
  • t is thought that the introns even help the splicing enzymes by folding themselves into stable RNA structures, thus directing the enzymes to the right locations.
  • Since the introns obstruct protein synthesis, they need to be removed from the mRNA, a procedure described as splicing.
    • wasin kusakabe
      wasin kusakabe on 14 Apr 12
       
      The Chloroplasts was an different entity before they were swallowed up by larger cells to corporate with each other.
  • wasin kusakabe on 14 Apr 12
     
    The differences between the genes in the chloroplasts and the genes in the nucleus being researched.
wasin kusakabe

Deep sequencing reveals potentially toxic, trade-restricted ingredients in some traditi... - 1 views

www.sciencedaily.com/...120412182328.htm

DNA sequencing Toxic Traditional Chinese Medicine

shared by wasin kusakabe on 15 Apr 12 - No Cached
  • DNA sequencing technology to reveal the animal and plant composition
  • of traditional Chinese medicines
  • These plants contain chemicals that can be toxic if the wrong dosage is taken, but none of them actually listed concentrations on the packaging.”
  • ...5 more annotations...
  • estricted animals that are classified as vulnerable, endangered, or critically endangered, including the Asiatic black bear and Saiga antelope.”
  • including animal DNA and potential allergens such as soy or nuts.
  • mislabelling of TCMs
  • multiple samples that contained DNA from animals listed as trade-restricted
    • wasin kusakabe
      wasin kusakabe on 15 Apr 12
       
      Traditional Chinese Medicines have incorrect labeling, which may lead to allergic reaction or crossing religious restrictions.
  • wasin kusakabe on 15 Apr 12
     
    Traditional Chinese Medicines' ingredients revealed by DNA sequencing to be potentially toxic.
Nitchakan Chaiprukmalakan

Plant research reveals new role for gene silencing protein - 0 views

www.sciencedaily.com/...120329141923.htm

shared by Nitchakan Chaiprukmalakan on 02 Apr 12 - No Cached
    • wasin kusakabe
      wasin kusakabe on 02 Apr 12
       
      Termination is equally as important as other sections of Transcription
  • Termination is the final stage of transcription.
  • Without termination, transcription continues down the chromosome unchecked.
  • ...3 more annotations...
  • The expression of a gene, when an organism's DNA is transcribed into a useable product, requires activation via a promoter or an external trigger.
  • DCL4 is a back-up to termination processes, helping a gene to be successfully expressed
  • If a gene ends badly, aberrant RNA will trigger silencing pathways
  • Sea Maskulrath on 02 Apr 12
     
    this new way to making the mature mRNA is very interesting. gotta love it. 
1 - 6 of 6
Showing 20▼ items per page