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:12/17/2014)... 15, 2014  HITLAB SM announced today ... audit to confirm its adherence to current U.S. ... enables HITLAB to conduct regulated smart device and ... for patient safety and research quality. ... quality, and delivery with innovative technology," said ...
(Date:12/11/2014)... Dec. 09, 2014 Research and Markets ... ( http://www.researchandmarkets.com/research/twhjll/biometrics_market ) has announced the ... APAC Region 2015-2019"  report to their offering. ... market is advances in technology. With continuous advances ... solutions to the latest standard that meets the ...
(Date:12/10/2014)... RALEIGH, N.C. , Dec. 9, 2014  Valencell, ... announced it is seeing a staggering demand from its ... demand, the Company revealed, is not solely coming from ... industries as well. "A wearable is only ... a result, accuracy is the ultimate driver in long-term ...
Breaking Biology News(10 mins):HITLAB Completes GCP Audit for FDA Smart Device & App Compliance 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wearable Technology Products Demand Highly Accurate Biometric Technology 2
... swine flu vaccine trials, led by the University of Leicester ... at the Leicester Royal Infirmary. Dr Iain Stephenson, a ... lecturer at the University, has been carrying out research into ... Now he is working with 175 volunteers, aged 18-50, ...
... into Great Lakes tributaries: impact on endangered fishes likely ... the University of Toronto, the Ontario Ministry of Natural ... drastic invasion of round goby into many Great Lakes ... and Grand Rivers. A number of the affected areas ...
... hormone estrogen tempers the killing activity of a specific group ... known to attack tumor cells and cells infected by viruses. ... cell molecule which has been known for a long time ... Rder and Dr. Armin Rehm together with immunologist Dr. Uta ...
Cached Biology News:Britain's first swine-flu trials under way 2Estrogen-dependent switch tempers killing activity of immune cells 2
(Date:12/17/2014)... December 16, 2014 The Activated ... 2013, which is why IBISWorld updated its original industry ... to benefit from an intensified focus on environmental policy. ... new emission standards for power plants and a range ... to IBISWorld Industry Analyst Sarah Kahn, “a range of ...
(Date:12/17/2014)... 16, 2014 “Never say, ‘I ... Universität Marburg’s Department of Physics, advises young women ... newly released SPIE Women in Optics 18-month ... shy to ask questions.” , In the annual ... mathematics) occupations ranging from university professor and laboratory ...
(Date:12/17/2014)... N.J. (PRWEB) December 17, 2014 ... (Euronext: IPN; ADR: IPSEY), today announced ... (referred to as Somatuline®) was approved by the ... treatment of gastroenteropancreatic neuroendocrine tumors (GEP-NETs) in adult ... advanced or metastatic disease to improve progression-free survival ...
(Date:12/17/2014)... 2014 This report is a ... industry. For an overview analysis, the report introduces ... chain structure, industry overview, policy analysis, and news ... has witnessed rapid development with key manufacturers ... This report mentions quartz tubing upstream raw materials ...
Breaking Biology Technology:Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 2Activated Carbon Manufacturing in the US Industry Market Research Report Has Been Updated from IBISWorld 3Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 2Network, Multitask, Persevere: SPIE Women in Optics Planner Subjects Share from Experience 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 2Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 3Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 4Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 5Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 6Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 7Ipsen Announces the FDA Approval of Somatuline® Depot® (lanreotide) Injection for the Treatment of Gastroenteropancreatic Neuroendocrine Tumors 82020 Quartz Tubing Market: Global Development & Forecasts Analysis Now at DeepResearchReports.com 2
... tech-savvy workers and managers for Wisconsins knowledge-based economy ... will require partnerships between business, education and government ... K-through-gray learning spectrum. , ,The latest example of ... UW-Stout to streamline transfer of credits for technical ...
... HR executives in London, UK. The participants were managers ... multinational firms. The subject of discussion was agile resourcing ... the workforce more flexible. The goal of agile resourcing ... the right people, with the right skills, in the ...
... Wingra Technologies announced Tuesday its release ... of software tools that automates the migration of server ... , ,Earlier versions of GroupWise Migrator for Exchange ... and personal distribution lists from GroupWise to Exchange. The ...
Cached Biology Technology:Higher ed cooperation will produce more skilled workers for Wisconsin 2Higher ed cooperation will produce more skilled workers for Wisconsin 3Stuck in Talent Gridlock 2Stuck in Talent Gridlock 3Wingra Technologies releases new e-mail-message migration software 2
... a single fragment based screening project: , ... 96 shape-diverse mixtures of 4 (5 uL each) ... structure refinement , Individual compounds are dissolved ... ca. 50 mM. Supplied in 5 96-well trays. ...
... PBL's bioassays for interferons are cytopathic ... and antiviral assays. The neutralization assay ... CPE activity of the cytokine. Sample types ... formulations. In these assays, one unit ...
... Protein G bind specifically to Fc regions ... Protein G conjugates are commonly used as ... immunoglobulin subtypes from serum, hybridoma ascites fluids, ... These reagents are also commonly used to ...
... The SYS203 is a complete, ... measurement in small samples, as is ... system is designed around Instechs miniature ... of an inch in diameter (3.2 ...
Biology Products: