Navigation Links
Le Rouge et le Noir: Where the black dahlia gets its color
Date:11/22/2012

The molecular mechanisms whereby a spectrum of dahlias, from white to yellow to red to purple, get their colour are already well known, but the black dahlia has hitherto remained a mystery. Now, a study published in BioMed Central's open-access journal BMC Plant Biology reveals for the first time that the distinctive black-red colouring is based on an increased accumulation of anthocyanins as a result of drastically reduced concentrations of flavones.

Dahlia variabilis hort. is a popular garden flower. Continuous dahlia breeding worldwide has led to the availability of a huge number of cultivars 20,000 varieties many of them showing red hues. However, black hues of dahlia flowers occur rarely, in comparison.

Flower colour in dahlias is exclusively based on the accumulation of a group of metabolites called flavonoids, for example anthocyanins, flavones and flavonols. It's known that red tones arise from anthocyanins, whilst white and yellow tones lack anthocyanins but contain large amounts of flavones and chalcones respectively. Flavones and flavonoids are colourless, but they influence flower colouration by acting as co-pigments, interacting with anthocyanins to stabilize their structures. It is assumed that flavones rather than flavonols are the predominant co-pigments present in dahlias since all cultivars show high flavone synthase II (FNS) enzyme activity and low flavonol synthase activity.

To examine the biochemical basis for the distinctive dark colouring of the black dahlia, the research team from the Vienna University of Technology in Austria used pigment, enzyme and gene expression analyses. They determined that the majority of black cultivars have very low concentrations of flavones, as confirmed by low FNS II expression. Since flavones compete with anthocyanin biosynthesis for common intermediates, the lack of flavones favours the accumulation of huge amo
'/>"/>

Contact: Hilary Glover
hilary.glover@biomedcentral.com
44-020-319-22370
BioMed Central
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Water, water everywhere - but is it essential to life?
2. UCSD researchers: Where international climate policy has failed, grassroots efforts can succeed
3. Civil engineers find savings where the rubber meets the road
4. Nowhere to hide: New device sees bacteria behind the eardrum
5. Report addresses challenges in implementing new diagnostic tests where they are needed most
6. Nature or nurture? It may depend on where you live
7. Where we split from sharks: Common ancestor comes into focus
8. Where to put nuclear waste?
9. Success of engineered tissue depends on where its grown
10. Coral scientists use new model to find where corals are most likely to survive climate change
11. Risk of cardiac arrest depends on where you live
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Le Rouge et le Noir: Where the black dahlia gets its color
(Date:7/21/2015)... Passwords have proven futile for securing ... U.S. Office of Personnel Management breach. Biometric authentication ... but developers and end-users are concerned about how ... Biometrics-as-a-Service provider HYPR Corp. announced today the general ... party integration. A video overview ...
(Date:7/9/2015)... DUBLIN , July 07, 2015 ... has announced the addition of the "Biometrics ... and Forecasts 2015-2020" report to their offering. ... a major contributor to this growth and the ... US$5.5 billion in revenue for companies involved in ...
(Date:7/8/2015)... 2015  Trovagene, Inc. (NASDAQ: TROV ), ... the launch of a study that aims to ... (PCM) technology for predicting response to treatment in ... of the novel immunotherapy agents Yervoy® (ipilumumab), a ... The 50-patient study will be led by researchers ...
Breaking Biology News(10 mins):HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 2Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 3Trovagene Initiates Study to Monitor Response to Immunotherapy in Melanoma Patients Using its Precision Cancer Monitoring Platform 4
... extremely high temperatures could help understand structures within our ... (EMBL) and Heidelberg University, both in Heidelberg, Germany, were ... a heat-loving fungus, and used that information to determine ... of the nuclear pore. The study was published today ...
... (Santa Barbara, Calif.) Scientists at UC Santa Barbara and ... affect the field of ecology and can assist the management ... because of parasites. The research, published this week in ... study of ecosystems. By doing so, the scientists say they ...
... new cell-culture system that mimics how specific nerve cell ... opens up new avenues of research about multiple sclerosis. ... involved in sending long-distance signals. Multiple sclerosis (MS) ... myelin sheath surrounding nerve fibers. The cause remains unknown, ...
Cached Biology News:A hot species for cool structures 2Parasites help reveal new ecological rules 2MS research: Myelin influences how brain cells send signals 2MS research: Myelin influences how brain cells send signals 3MS research: Myelin influences how brain cells send signals 4
(Date:7/28/2015)... SPRING, Md. and RESEARCH TRIANGLE PARK, N.C., July 28, ... ) today announced its financial results for the ... ®  sales grew nearly 300% as compared to ... was first launched," said Roger Jeffs, Ph.D., United ... in Orenitram sales was due to an increase ...
(Date:7/27/2015)... 27, 2015  Amgen (NASDAQ: AMGN ) today ... results on Thursday, July 30, 2015, after the close ... followed by a conference call with the investment community ... Amgen will be Robert A. Bradway , chairman ... senior management team. Live audio of the ...
(Date:7/27/2015)... ... July 27, 2015 , ... This is a professional and ... basic overview of the industry including definitions, classifications, applications and industry chain structure. ... competitive landscape analysis, and key regions development status. Development policies and plans are ...
(Date:7/27/2015)... 27, 2015   Inocucor Technologies Inc ., ... accelerators for farmers, has received a notice of ... for its patent application to protect Inocucor consortia ... and enhance yields on farms and in greenhouses. ... live IN-M1 microbial consortium and its fermentation byproducts, ...
Breaking Biology Technology:United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 2United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 3United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 4United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 5United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 6United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 7United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 8United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 9United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 10United Therapeutics Corporation Reports Second Quarter 2015 Financial Results 11Amgen Announces Webcast of 2015 Second Quarter Financial Results 22015 Biophotonics Market Global Research 22015 Biophotonics Market Global Research 3Inocucor Technologies Receives Groundbreaking U.S. Patent for Proprietary Biological Processes that Stimulate Plant Growth 2Inocucor Technologies Receives Groundbreaking U.S. Patent for Proprietary Biological Processes that Stimulate Plant Growth 3
... College of Wisconsin is reuniting the commissioners, authors ... that laid the ethical foundation for human research in ... reports completion in 1979, the Belmonters will come together ... enduring impact on research and celebrate its 25th anniversary. ...
... attended a talk at my local elementary school given by ... proponent of systems thinking. Systems thinking is a conceptual framework, ... fifty years, to train people to see the big picture ... see how to make systematic change successfully. The essence of ...
... and staff interested in launching technology-based businesses can now ... process of taking a good idea to the marketplace. ... University of Wisconsin-Madison," is now available as an electronic ... of Corporate Relations (OCR). , ,The new guide begins ...
Cached Biology Technology:Belmont Report Commission reuniting for Medical College of Wisconsin Symposium 2Outsourcing: Net gain or shifting the pain? 2Outsourcing: Net gain or shifting the pain? 3New guide offers assistance to UW-Madison entrepreneurs 2
... Detectors provide unmatched value and flexibility ... automation needs. Capable of performing fluorescence, ... same instrument, the DTX Series can ... be integrated seamlessly with Beckman Coulters ...
BioGenex IHC Kits for Rodent Tissues are designed for immunohistochemistry on rodent and rabbit tissues that are closely related to the source of the primary antibody. This kit comes with rat seconda...
... Solution is available in a ready-to-use ... reagent for dewaxing paraffin-embedded tissue sections ... hybridization, or other analytical methods. The ... of dipping the slides in a ...
... The BioGenex Super Sensitive ... is a novel product ... non-biotin polymeric technology. This ... signal to noise ratio ...
Biology Products: