Could the Tide Be Turning for Transgenic Wheat?: GMO wheat under field
trials in Australia's Victoria state contains genes from plants such as
corn and moss as well as yeast, Spangenberg said on July 2. Test results
show the transgenic grain generated a 20 percent gain in yield compared
with non-GMO crops under drought stress, according to German
Spangenberg, head of Australia's Victorian AgriBiosciences Center.
Spangenberg said, "This is a very significant increase. GM wheat for
drought tolerance will be important to sustain agricultural production
into the future." DuPont Co., the world's second-biggest producer of
seeds, plans to engineer wheat and rice to boost yields as rising demand
lifts grain prices to records. Growers and buyers have asked Wilmington,
Delaware-based DuPont to develop higher-yielding wheat varieties to help
keep pace with output of crops such as corn.
http://www.agweb.com/get_article.aspx?pageid=144216
Food concerns prompt China to prioritize GM rice (Feature): Beijing -
China's leaders decided in early July to go all-out to develop
genetically modified organisms (GMOs), prompted by rising prices and
concerns that the nation of 1.3 billion people may become more reliant
on expensive exports. Agricultural scientists at China's Zhejiang
University announced in March that they had developed a way to create
'selectively terminable' GM rice, a breakthrough which they hope will
lead to the industrialization of GM rice seeds. The scientists said the
pest- and disease-resistant GM rice plants can easily be killed through
genetically conditioned high sensitivity to a specific herbicide,
eliminating concerns about them becoming wild or cross-pollinating with
normal rice plants.
http://www.monstersandcritics.com/news/business/news/article_1416999.php /
Controlled Release of GM Banana in Australia: The Queensland University
of Technology (QUT) has received an approval from Australia's Office of
the Gene Technology Regulator (OGTR) for the limited and controlled
release of up to 17 banana lines genetically modified for disease
resistance. The release will take place in Cassowary Coast, Queensland
on a maximum total area of 1.4 ha between July 2008 and April 2010. The
GM lines contain the ced-9 gene from the nematode C. elegans that is
expected to provide the plants protection against pathogenic
microorganisms. The gene encodes a protein that prevents plant cells
from undergoing programmed cell death (apoptosis) in response to
pathogen attack. The banana lines also contain the antibiotic selectable
marker gene nptII.
http://www.ogtr.gov.au/internet/ogtr/publishing.nsf/Content/dir079-2007
Biotech Research for Profitable Cultivation of Palm Trees: Researchers
at India's Centre for Plantation Crops Research Institute (CPCRI) have
used biotechnology to achieve a breakthrough in distinguishing between
male and female palmyrah plants in the nursery. The palms are slow
growing perennial and have no distinguishing features to identify the
sex until flowering, which is usually after 12 to 15 years. Using the
molecular marker technology, Random Amplified Polymorphic DNA (RAPD)
technique, DNA segments linked to sex determination in dioecious
palmyrah were identified.
http://www.ias.ac.in/currsci/oct252007/1075.pdf
Insights on How Plant Roots Develop: The exact mechanism of how plants
regulate root formation has fascinated and frustrated scientists since
the nineteenth century. The way that new lateral roots are formed and
grow is vital to the integrity and architecture of the root system.
Lateral roots originate deep within the parent root and must emerge
through intervening layers of tissues before entering the soil. A group
of international scientists reported how lateral root emergence is
achieved in a paper published by Nature Cell Biology. The scientists
found out that new lateral roots reprogram the cells that overlay them,
causing them to separate and enabling the new root to emerge. The
developing roots secrete the phytohormone auxin to 'manipulate' adjacent
cells. The hormone activates a group of cell wall remodeling enzymes
that promotes the separation of overlaying cells. The scientists have
also identified the genes that control this process. Malcolm Bennett,
researcher from the University of Nottingham and one of the authors of
the study, said that the discovery might enable the development of crops
with improved root architecture.
Read more at
http://communications.nottingham.ac.uk/News/Article/The_emerging_story_of_plant_roots.html
The abstract of the paper is available at
http://www.nature.com/ncb/journal/vaop/ncurrent/abs/ncb1754.html
Transgenic Rice Resistant to Rice Blast and Sheath Blight: A group of
scientists from the University of Bagoda in India has developed
transgenic rice varieties resistant to the rice blast and sheath blight,
devastating fungal diseases that affect rice productivity worldwide. The
scientists introduced the gene Dm-AMP1 coding for an anti-fungal
defensin from dahlia. Expression levels of Dm-AMP1 ranged from 0.43% to
0.57% of total soluble protein in transgenic plants. Constitutive
expression of the transgene suppresses the growth of the rice blast and
sheath blight causal organisms by 84% and 72%, respectively. The
recombinant protein was found to be specifically expressed in the
apoplastic region (diffusional spaces between cells) of the plant
tissues where they bind to interact with the fungal membrane leading to
membrane destabilization, and ultimately to reduced proliferation of the
fungal pathogen.
http://www.springerlink.com/content/g1112022l627mk35/?p=007281c8d6f744b6
9ae1cd86a3c90e0d&pi=0#ContactOfAuthor4
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