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:12/11/2014)... PAUL, Minn. , Dec. 10, 2014 /PRNewswire/ ... wireless physiologic monitoring, has released a new series ... needs of preclinical toxicology researchers. M series, part ... help toxicologists collect the best possible physiologic data ... Adding functional endpoints to toxicology studies ...
(Date:12/10/2014)... 2014 Research and Markets ( ... "Biometrics Market in Japan 2014-2018" report ... http://photos.prnewswire.com/prnh/20130307/600769 The integration of biometrics ... banking and upgradation of the driver,s license is ... market. Besides the aforementioned projects, biometrics is being ...
(Date:12/3/2014)... IRVINE, Calif. , Dec. 2, 2014 /PRNewswire/ ... of globally deployed, innovative test solutions for military, ... the newest version of its successful TS-900 ... the performance and features of high-end systems to ... with outstanding value compared to traditional ATE. ...
Breaking Biology News(10 mins):New telemetry implants expected to change how large animal toxicology studies are conducted 2Biometrics Market in Japan 2014-2018: Key Vendors are DDS, Fujitsu, Hitachi and NEC 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3
... CHICAGO New research using animal models is enabling ... addiction in humans knowledge that may lead to ... that cause people to relapse. The findings were released ... meeting and the world,s largest source of emerging news ...
... Atlanta, GA Current research suggests that latent ... The related report by Onyeagocha et al, "Latent cytomegalovirus ... issue of The American Journal of Pathology . ... in the United States. Most people who are ...
... CLEMSON Algae, not asteroids, were the key ... University researchers. Geologist James W. Castle and ecotoxicologist John ... were a deadly factor in mass extinctions millions of ... into the past but also offers a caution about ...
Cached Biology News:Studies improve knowledge of underlying brain changes caused by addiction 2The bowels of infection 2Clemson researchers say algae key to mass extinctionss 2
(Date:12/19/2014)... (PRWEB) December 18, 2014 iLab Solutions, ... the appointment of Siri Bryant as the new Director ... Director of Core Implementations. These two new leadership positions ... customer service by ensuring that iLab continues to meet ... the last four years, iLab has been deployed at ...
(Date:12/19/2014)... 2014 Egenix, Inc. is pleased to announce that ... the Board, to succeed Donald Fresne ; Mr. Fresne ... as a member of the Board.  In recognition of the ... company over almost twenty years, the Board designated Mr. Fresne ... has established a Search Committee to find a suitable replacement ...
(Date:12/17/2014)... “Never say, ‘I cannot do ... Department of Physics, advises young women pursuing careers ... SPIE Women in Optics 18-month planner ... ask questions.” , In the annual planner, women ... ranging from university professor and laboratory researcher to ...
(Date:12/17/2014)... December 17, 2014 Xeno Diagnostics ... following its most recent COLA inspection. Xeno has ... a national healthcare accreditation organization. Accreditation is earned ... quality in day-to-day operations, demonstrate continued accuracy in ... rigorous on-site laboratory survey. , While ...
Breaking Biology Technology:iLab Solutions Announces Two New Leadership Positions to Meet the Needs of Its Growing Customer Base 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3Xeno Diagnostics Receives 3rd Award for Laboratory Excellence 2
... Therapeutics, a,drug and diagnostic discovery company, has completed ... The company expects to have,this test certified and ... GLP (Good,Laboratory Practices) compliant laboratories to the pharmaceutical ... test aims to identify patients suffering from,Alzheimer,s disease ...
... Use of Hand ... NORCROSS, Ga., Nov. 8 Headlines call MRSA ... continue,to report daily on recent school closings and, in ... staph infection*. Even though,hand-washing is advocated as one of ...
... N.J., Nov. 8 Ortho Biotech,Products, L.P. today ... from the U.S. Food and Drug,Administration (FDA) to ... (ESA) class. The modifications to the label ... from the May 10th FDA Oncologic Drugs Advisory,Committee ...
Cached Biology Technology:ExonHit Completes a Prototype to Detect Alzheimer's Disease From Blood 2ExonHit Completes a Prototype to Detect Alzheimer's Disease From Blood 3ExonHit Completes a Prototype to Detect Alzheimer's Disease From Blood 4Soap and Water May not be Enough to Fight MRSA Superbug 2Soap and Water May not be Enough to Fight MRSA Superbug 3Ortho Biotech Modifies Prescribing Information for PROCRIT(R) (Epoetin alfa) Label Reflects Recommendations from Recent FDA Advisory Committee Meetings 2Ortho Biotech Modifies Prescribing Information for PROCRIT(R) (Epoetin alfa) Label Reflects Recommendations from Recent FDA Advisory Committee Meetings 3Ortho Biotech Modifies Prescribing Information for PROCRIT(R) (Epoetin alfa) Label Reflects Recommendations from Recent FDA Advisory Committee Meetings 4Ortho Biotech Modifies Prescribing Information for PROCRIT(R) (Epoetin alfa) Label Reflects Recommendations from Recent FDA Advisory Committee Meetings 5
pETDuet-1 is designed for the coexpression of two target genes....
Mouse Laminin-1 MAb (Clone AL-3)...
IEX-1 S/L (H-20)...
... reactivity with rat (100%), mouse ... pig (48%). Slight reactivity ... confirmed by Western blot versus ... Gia-1, Gia-2, rat Gia-3, bovine ...
Biology Products: