Navigation Links
Discovery may lead to new tomato varieties with vintage flavor and quality
Date:6/28/2012

A new discovery could make more tomatoes taste like heirlooms, reports an international research team headed by a University of California, Davis, plant scientist.

The finding, which will be reported in the June 29 issue of the journal Science, has significant implications for the U.S. tomato industry, which annually harvests more than 15 million tons of the fruit for processing and fresh-market sales.

"This information about the gene responsible for the trait in wild and traditional varieties provides a strategy to recapture quality characteristics that had been unknowingly bred out of modern cultivated tomatoes," said Ann Powell, a biochemist in UC Davis' Department of Plant Sciences and one of the lead authors of the study.

"Now that we know that some of the qualities that people value in heirloom tomatoes can be made available in other types of tomatoes, farmers can have access to more varieties of tomatoes that produce well and also have desirable color and flavor traits," she said.

For decades, plant breeders in the tomato industry have selected varieties that are uniformly light green before they ripen, in order to produce tomatoes that can be harvested at the same time.

However, this characteristic is accompanied by an unintended reduction in sugars that compromises the flavor of the fresh fruit and its desirability for processing.

Powell's UC Davis research team began studying the genes influencing tomato fruit development and ripening after spending two summers screening tomato plants for transcription factors that might play a role in both fruit color and quality. Transcription factors are proteins that regulate genes, or turn them on and off. These factors themselves are manufactured or expressed by genes.

The UC Davis researchers were particularly interested in tomatoes they observed in the field that were unusually dark green before they ripened.

Partnering with researchers at Cornell University and in Spain, who were mapping regions of the tomato genome, the scientists discovered two transcription factors, called GLK1 and GLK2, that control the development of chloroplasts. Chloroplasts are the structures in the plant cells that enable plants to photosynthesize, converting the energy of sunlight into sugars and other compounds that influence flavor and color.

The researchers scoured a collection of mutant and wild species of tomatoes at UC Davis established at UC Davis by the late Professor Charles Rick beginning in the 1950s. They discovered that dark green tomatoes that naturally express GLK2 produced ripe fruit with increased levels of sugars or soluble solids, important for processing tomatoes, as well as higher levels of the health-promoting compound lycopene.

"Nature presents numerous important genes and their variants, like uniform ripening, that breeders employ to facilitate the needs of growers, processors and consumers," said Jim Giovannoni, a USDA plant molecular biologist with the Boyce Thompson Institute at Cornell University. "Understanding the genes responsible for these characteristics facilitates the challenging process of breeding crops that meet the needs of all components of the food-supply chain."


'/>"/>

Contact: Patricia Bailey
pjbailey@ucdavis.edu
530-752-9843
University of California - Davis
Source:Eurekalert

Related biology news :

1. Discovery of a molecule that initiates maturation of mammalian eggs can lead to more IVF pregnancies
2. Annual Drug Discovery Conferences Being Held in Boston MA, Spring 2012
3. Discovery provides blueprint for new drugs that can inhibit hepatitis C virus
4. Unexpected discovery reveals a new mechanism for how the cerebellum extracts signal from noise
5. Discovery offers insight into treating viral stomach flu
6. Breast cancer risk gene discovery fast tracked by new technology
7. Tales from the crypt lead researchers to cancer discovery
8. New discovery may lead to effective prevention and treatment of graft-versus-host dsease
9. Stomata development in plants unraveled -- a valuable discovery for environmental research
10. Discovery reveals chromosomes organize into yarns
11. Bacteria discovery could lead to antibiotics alternatives
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/31/2016)... -- Genomics firm Nabsys has completed a financial  restructuring under ... M.D., who returned to the company in October 2015. ... including Chief Technology Officer, John Oliver , Ph.D., ... Vice President of Software and Informatics, Michael Kaiser ... Bready served as CEO of Nabsys from 2005-2014 and ...
(Date:3/22/2016)... PROVO and SANDY, ... Screening Ontario (NSO), which operates the highest sample volume ... testing, and Tute Genomics and UNIConnect, leaders in clinical ... today announced the launch of a project to establish ... testing panel. NSO has been contracted ...
(Date:3/15/2016)... 15, 2016 --> ... Transparency Market Research "Digital Door Lock Systems Market - Global ... 2023," the global digital door lock systems market in terms ... and is forecast to grow at a CAGR of 31.8% ... and medium enterprises (MSMEs) across the world and high industrial ...
Breaking Biology News(10 mins):
(Date:5/20/2016)... ... May 20, 2016 , ... Kablooe Design, a leading provider ... announced its official 25th anniversary of the business. “We have worked hard to build ... our customers for the privilege and honor of serving their product design and development ...
(Date:5/19/2016)... RIDGE, British Columbia , May 19, 2016 ... AdvanTec Global Innovations Inc. (AGI), based out of ... recently added Greenlane Biogas Ltd. to its existing ... 2-year contract manufacturing agreement. AFS along with its ... Technologies (ABT) is a vertically integrated industrial group ...
(Date:5/19/2016)... May 19, 2016 - I ... orale durante il 52 ° ...    - Le conclusioni dello studio indicano ... pazienti trattati, di cui il 90% presenta una d ... o più. Il settantadue per cento dei pazienti ha riscontrato ...
(Date:5/18/2016)... ... 18, 2016 , ... STACS DNA Inc., the sample tracking software company, today ... assault kit processing to help them save time and reduce errors. , Sexual Assault ... be processed and victims informed of results. Due to a previous lack of tools, ...
Breaking Biology Technology: