Navigation Links
Cornell researchers prove how plants transport sugars
Date:12/21/2007

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.

The findings not only deepen understanding of basic plant biology but could one day allow researchers to genetically engineer plants with increased photosynthetic rates, yields and carbon dioxide intake. This might be critically important in an era of climate change.

The theory of transporting sugar, the polymer trap model, was first proposed in 1991 by Robert Turgeon, Cornell professor of plant biology. He is also the senior author of the latest research published in the Dec. 4 issue of the Proceedings of the National Academy of Sciences. Ashlee McCaskill, Ph.D. '07, who worked in Turgeon's lab, is the paper's lead author.

Turgeon's theory suggested that as sucrose, a form of sugar, accumulates in leaves as a product of photosynthesis, it diffuses into the plant's tubelike transport tissue, called phloem, along with other nutrients to move to other areas of the plant. Once in the phloem, small molecules of sucrose polymerize, or combine, to form larger, more complex sugars, which become too large to flow back into the leaf. The polymerized sugars are then forced to move away from the leaf to parts of the plant where they may be used or stored.

To prove the theory, Turgeon and McCaskill genetically engineered a plant closely related to a member of the figwort family, purple mullein (Verbascum phoeneceum L.), so that two genes involved with polymerizing sucrose into larger molecules were silenced. When they did so, sugars backed up in the leaves.

In normal plants, when sugars (made from water and carbon dioxide during photosynthesis) accumulate in the leaves, photosynthesis slows down, and the plant does not take in as much carbon dioxide from the air. Likewise, when the sugars move out of the leaves,
'/>"/>

Contact: Press Relations Office
pressoffice@cornell.edu
607-255-6074
Cornell University Communications  
Source:Eurekalert

Page: 1 2

Related biology news :

1. Cornell will host the Northeast Biofuel Summit, Nov. 11-13
2. First symposium of UN University-Cornell Africa Series to be held at UN
3. Wiggle room: Cornell researcher borrows idea from sperm to provide energy for nanoscale robots
4. Drug aimed at 2 bioterror agents blocks live viral infection, Weill Cornell team reports
5. Cornell researcher seeks clues to how tuberculosis infects cells
6. Researchers identify proteins involved in new neurodegenerative syndrome
7. Texas researchers and educators head for Antarctica
8. MGH researchers describe new way to identify, evolve novel enzymes
9. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
10. U of MN researchers discover noninvasive diagnostic tool for brain diseases
11. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Cornell researchers prove how plants transport sugars
(Date:11/7/2014)... -- Leading Biometric companies aim to provide consumers ... transactions.  Companies in focus today are: NXT-ID, Inc. (NASDAQ: ... ), Google Inc. (NASDAQ: GOOG ), Microsoft Corporation ... EBAY ) and MasterCard Inc. (NYSE: MA) NXT-ID, ... authentication company focused on the growing mobile commerce is pleased ...
(Date:11/6/2014)... is an asset for a predator. Except when that predator ... tiger beetle, relative to its size, is the fastest creature ... body lengths per second (at about five miles per hour). ... take the sprinting gold from the tiger beetle, a person ... The tiger beetle has a problem. At peak speeds, everything ...
(Date:11/5/2014)... RENO – Kelly Redmond has dedicated his career ... knowledge to a general audience. , As deputy ... Climate Center at Nevada,s Desert Research Institute, Redmond ... the management, application and dissemination of climate data ... Annual Fall Meeting in San Francisco on December ...
Breaking Biology News(10 mins):Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6The tiger beetle: Too fast to see 2Nevada climatologist to be honored at AGU Fall Meeting for lifetime of public outreach 2
... Learning more about the behavior of bed ... Agriculture (USDA) scientists to identify compounds to help control these ... decade has caused problems in major U.S. cities where they ... The small, blood-feeding insects are not known to transmit diseases, ...
... February 14 between 1:15 p.m., and 3:30 p.m. PST, ... Pregnancy Meeting , in San Francisco, California, researchers will ... (FER) have better outcomes compared to fresh in vitro ... general population. The study collected data from all ...
... Boston College biologist Ken Williams, whose research focuses on ... illnesses that strike people living with HIV and AIDS, ... the NIH,s National Institute of Neurological Disorders and Stroke. ... for Williams, research into monocyte and macrophage cells, which ...
Cached Biology News:Studying bed bug actions for new management tactics 2NIH grant funds Boston College research into illnesses afflicting people living with HIV 2
(Date:11/24/2014)...  Last week, Representatives Gus Bilirakis ... a bold bipartisan step on behalf of patients ... Original co-sponsors of the legislation include Representatives McCaul ... drug makers and innovators to "repurpose" major market ... which opens the door to the development of ...
(Date:11/24/2014)...   First published articles now ... Elsevier , a world-leading provider of scientific, technical and medical ... of the latest title in the Current Opinion journal ... . Current Opinion in ... to keep up-to-date with the expanding volume of information published ...
(Date:11/24/2014)... 23, 2014 One of the most extensive, ... and photonics is now available to high school and junior ... SPIE, the international society for optics and photonics , ... SPIE Digital Library available to high schools for ... technologies are integral to all areas of life in today’s ...
(Date:11/24/2014)... Dallas, Texas (PRWEB) November 24, 2014 ... China Adipic Dihydrazide Industry is a professional and ... It provides Adipic Dihydrazide information, like its definition, ... as industry overview. This report covers the international ... as global (such as the US, Europe, Asia, ...
Breaking Biology Technology:OPEN Act Introduced to Repurpose Drugs for Rare Diseases 2Elsevier Announces Launch of New Journal: Current Opinion in Food Science 2Elsevier Announces Launch of New Journal: Current Opinion in Food Science 3SPIE Digital Library Now Available to High Schools, Two-Year Colleges at No or Low Cost 2Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 2Adipic Dihydrazide Industry 2019 Research Forecasts on Worldwide, China Regions Now Available at ReportsnReports.com 3
... Biomarker for Prostate Cancer, ANN ARBOR, Mich., June ... profiling data and analysis tools, today,announced the central role ... of SPINK1 as a key new therapeutic target and,biomarker ... compendium of nearly 26,000 gene,expression and DNA copy number ...
... Chemetics(R) Technology to Lexicon Targets, COPENHAGEN, June ... with Lexicon Pharmaceuticals, Inc. (Nasdaq: LXRX ) ... compounds for highly,validated drug targets., Under the ... technology will be applied to identify novel small ...
... Texas Oncology-Baylor Charles A.,Sammons Cancer Center, a ... Trial Participation Award at the recent 44th American ... The practice was one of,only 10 community oncology ... the fifth consecutive year that practices affiliated with ...
Cached Biology Technology:Oncomine(TM) Again Key to Prostate Cancer Discovery 2Nuevolution Announces Drug Discovery Alliance With Lexicon Pharmaceuticals 2Nuevolution Announces Drug Discovery Alliance With Lexicon Pharmaceuticals 3Texas Oncology-Baylor Sammons Cancer Center Recognized for Highest Commitment to Clinical Research at ASCO 2