Navigation Links
For birds, red means 'go'

New research has shown that certain Australian native flowers have shifted away from using insects as pollinators and evolved their flower colour to the red hues favoured by birds.

In a study published in New Phytologist, biologists from Monash University and RMIT University have shown for the first time that Australian native flowers exclusively pollinated by birds have evolved colour spectral signatures that are best discriminated by those birds.

Dr Adrian Dyer of Monash and RMIT said previous studies had shown that flower colour evolved to attract bees as pollinators.

"We know that some flowers had evolved spectral signatures to suit bee pollinators, but the story for bird-pollinated flowers was not clear," Dr Dyer said.

Lead author and PhD student Mani Shrestha of the Monash School of Biological Sciences collected spectral data from over 200 flowering plants and identified the pollinators as birds or insects. Then with Associate Professor Martin Burd - also of the School of Biological Sciences - did phylogenetic analyses to identify how the flowers have evolved spectral signatures.

"We found that flowers exclusively pollinated by birds had initially evolved to suit insect vision, but more recently the spectral signature of bird pollinated flowers had shifted towards longer wavelengths," Mr Shesthra said

The research showed that rather than just having any type of red reflection, bird pollinated flowers targeted the specific wavelengths that best match the long wavelength tetrachromatic (four colour) vision of many Australian native birds.

"Bird pollinated flowers may have evolved red signals to be inconspicuousness to some insects that are poor pollinators, whilst also enhancing the discrimination of bird pollinators," Mr Shresthra said.

Associate Professor Burd said the work had broad significance for understanding how flower colours have evolved to suit specific pollinators, and how colour may continue to evolve in particular environments depending upon the availability of effective pollinators.

"The colour cues in Australian flowers would be easily detected by honeyeaters, the most important family of nectar feeding birds in Australia. Hummingbirds in the Americas have similar visual systems to honeyeaters, so we expect to find similar colour signals among American flowers," Associate Professor Burd said.

"But in Asia and Africa, birds with a different type of colour vision are the primary avian pollinators. If flower colours in these regions are tuned to the specific capacities of their own birds, we would have strong evidence that we've cracked the code that plants use to communicate with birds."


Contact: Emily Walker
Monash University

Related biology news :

1. For young birds, getting stressed out can be a good thing
2. Plant scientists at CSHL demonstrate new means of boosting maize yields
3. Tolerance to malaria by means of iron control
4. Evolutionary straitjacket means flies cant take the heat
5. Glass offers improved means of storing UKs nuclear waste
6. New means of safeguarding world fish stocks proven
7. Science means innovation
8. Preventing home invasions means fighting side-by-side for coral-dwelling crabs and shrimp
Post Your Comments:
(Date:10/29/2015)... ANN ARBOR, Mich. , Oct. 29, 2015 ... with Eurofins Genomics for U.S. distribution of its ... DNA-seq kit and Rubicon,s new ThruPLEX Plasma-seq ... DNA to enable the preparation of NGS libraries ... in plasma for diagnostic and prognostic applications in ...
(Date:10/27/2015)... -- Munich, Germany , October ... automatically maps data from mobile eye tracking videos created ... that they can be quantitatively analyzed with SMI,s analysis ... , October 28-29, 2015. SMI,s Automated Semantic Gaze ... tracking videos created with SMI,s Eye Tracking Glasses ...
(Date:10/23/2015)... Research and Markets ( ) has ... Biometrics Market 2015-2019" report to their offering. ... global voice recognition biometrics market to grow at a ... --> --> The report, Global Voice ... an in-depth market analysis with inputs from industry experts. ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... 24, 2015  Asia-Pacific (APAC) holds the third-largest ... market. The trend of outsourcing to low-cost locations ... higher volume share for the region in the ... margins in the CRO industry will improve. ... ( ), finds that the market earned ...
(Date:11/24/2015)... ... November 24, 2015 , ... ... But unless it is bound to proteins, copper is also toxic to cells. ... at Worcester Polytechnic Institute (WPI) will conduct a systematic study of copper in ...
(Date:11/24/2015)... ... , ... This fall, global software solutions leader SAP and AdVenture Capital brought ... pitch their BIG ideas to improve health and wellness in their schools. , Now, ... the title of SAP's Teen Innovator, an all-expenses paid trip to Super Bowl 50, ...
(Date:11/24/2015)... 24, 2015 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ: ... the remaining 11,000 post-share consolidation (or 1,100,000 pre-share ... "Series B Warrants") subject to the previously disclosed ... 23, 2015, which will result in the issuance ... to the issuance of such shares, there will ...
Breaking Biology Technology: