Navigation Links
Wildflower colors tell butterflies how to do their jobs
Date:1/9/2011

DURHAM, N.C. The recipe for making one species into two requires time and some kind of separation, like being on different islands or something else that discourages gene flow between the two budding species.

In the case of common Texas wildflowers that share meadows and roadside ditches, color-coding apparently does the trick.

Duke University graduate student Robin Hopkins has found the first evidence of a specific genetic change that helps two closely related wildflowers avoid creating costly hybrids. It results in one of the normally light blue flowers being tagged with a reddish color to appear less appetizing to the pollinating butterflies which prefer blue.

"There are big questions about evolution that are addressed by flower color," said Hopkins, who successfully defended her doctoral dissertation just weeks before seeing the same work appear in the prestigious journal Nature.

What Hopkins found, with her thesis adviser, Duke biology professor Mark Rausher, is the first clear genetic evidence for something called reinforcement in plants. Reinforcement keeps two similar proto-species moving apart by discouraging hybrid matings. Flower color had been expected to aid reinforcement, but the genes had not been found.

In animals or insects, reinforcement might be accomplished by a small difference in scent, plumage or mating rituals. But plants don't dance or choose their mates. So they apparently exert some choice by using color to discourage the butterflies from mingling their pollen, Hopkins said.

Where Phlox drummondii lives by itself, it has a periwinkle blue blossom. But where its range overlaps with Phlox cuspidata, which is also light blue, drummondii flowers appear darker and more red. Some individual butterflies prefer light blue blossoms and will go from blue to blue, avoiding the dark reds. Other individual butterflies prefer the reds and will stick with those. This
'/>"/>

Contact: Karl Leif Bates
karl.bates@duke.edu
919-681-8054
Duke University
Source:Eurekalert

Page: 1 2

Related biology news :

1. College students want more information about native wildflowers
2. Wildflower armors itself against disease
3. Wildflower declines in Thoreaus Concord woods are due to climate changes
4. Hearing colors, seeing sounds: New research explores sensory overlap in the brain
5. From butterflies wings to bank notes -- how natures colors could cut bank fraud
6. Butterfly vision, wing colors linked, UCI study finds
7. Study finds monarch butterflies use medicinal plants to treat offspring for disease
8. Butterflies shed light on how some species respond to global warming
9. As monarch butterflies journey north, gardeners can help protect species, researcher says
10. Now butterflies are also being counted in China, Australia and Israel
11. Hind wings help butterflies make swift turns to evade predators, study finds
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/9/2014)... increase the survival rate of naturally aged animals? ... Pharmaceutical Sciences, Southwest University, China performed an animal ... low dose of levothyroxine for 3 consecutive months. ... obvious improvement in cognitive and an increased rat ... mechanism was demonstrated that levothyroxine treatment can increase ...
(Date:7/9/2014)... southern Europe are less fit in terms of ... European peers. Moreover, southern adolescents are more obese ... fat than those from the centre-north of Europe. ... from an ambitious study conducted by scientists from ... in collaboration with 25 other European research groups. ...
(Date:7/9/2014)... They are amongst the most numerous inhabitants of the ... . Not visible to the naked eye, when they ... sized patches, they are even visible on satellite images. ... responsible for approximately half of the global photosynthesis output," ... University Jena (Germany). In the process the greenhouse gas ...
Breaking Biology News(10 mins):Adolescents from southern Europe are less fit and more obese than central-northern European peers 2Short circuit in the food web 2
... clue to the causes of autism and mental retardation ... rapidly transfers information from one neuron to the next. ... with students from the Sackler School of Graduate Biomedical ... coli) plays a key role in synapse maturation, and ...
... , CAMBRIDGE, Mass. -- Human pluripotent stem cells, which can ... to treat a wide range of ailments, including Parkinson,s disease, ... with such cells have had trouble growing large enough quantities ... human studies. Furthermore, most materials now used to grow ...
... Mutations in a single gene can cause several ... considered different disorders. With support from the National ... exome sequencing a new gene scanning technology that ... mutations. "This is going to change the way ...
Cached Biology News:Researchers connect APC protein to autism and mental retardation 2MIT researchers develop a better way to grow stem cells 2MIT researchers develop a better way to grow stem cells 3Gene scan finds link across array of childhood brain disorders 2Gene scan finds link across array of childhood brain disorders 3
(Date:1/15/2014)... Cynvenio, a cancer diagnostics company focused on ... of tumor cells in the bloodstream, today announced that ... support application powered by CollabRx, Inc. , Available ... Therapy Finder will provide breast cancer patients and their ...
(Date:1/15/2014)... 15, 2014 This webinar will focus ... clinical safety assessment in biosimilars. , Regulatory frameworks are ... drug development, however the complex nature of biopharmaceuticals makes ... and efficacy extremely challenging. Based on the specific aspects ...
(Date:1/15/2014)... Reston, VA (PRWEB) January 15, 2014 ... education have continued their sponsorship of an annual competition ... interest in, and access to, innovative STEM study. The ... , TEAMS: Tests of Engineering Aptitude, Mathematics, and ...
(Date:1/15/2014)... Scottsdale, Arizona (PRWEB) January 15, 2014 ... growth for Scottsdale’s Brain State Technologies®. They saw continued ... University Medical Center who were awarded a $1 million ... papers published in “Brain and Behavior” a peer reviewed ...
Breaking Biology Technology:Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 2Cynvenio Offers New Breast Cancer Therapy Finder Application for its ClearID Breast Cancer Genomic Test 3Xtalks Life Sciences Webinar Examines Safety Assessment of Biosimilars 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3
... Advanced Pain Remedies (APR), a subsidiary of Cato ... been received, to advance its lead development candidate, SP-SAP. ... of specific cell types to manipulate them for the ... grant from the National Cancer Institute (NCI). Advanced Targeting ...
... Group, Inc. (MDXG), an integrated developer, manufacturer and marketer of ... at the 13th Annual Needham Growth Conference in New York. ... President and COO, and Michael J. Senken, CFO of MiMedx, ... a.m. Eastern Time at the New York Palace Hotel in ...
... 2011 Sutro Biopharma, a biopharmaceutical company developing ... properties, today announced that the company has entered ... research, development and commercialization of novel peptide-based therapeutics. ... Sutro Biopharma will receive an upfront payment of ...
Cached Biology Technology:Advanced Pain Remedies, a Subsidiary of Cato BioVentures, Announces a Three Million Dollar Award from the National Cancer Institute for SP-SAP 2Advanced Pain Remedies, a Subsidiary of Cato BioVentures, Announces a Three Million Dollar Award from the National Cancer Institute for SP-SAP 3Sutro Biopharma Forges Partnership with Pfizer for Discovery, Development and Commercialization of Novel Peptide-Based Therapeutics 2
... temperature-controlled microwave oven for use ... Retrieval of formalin-fixed, paraffin-embedded tissue ... use, high throughput (96 slides ... When used in conjunction with ...
... reagents and supplies, for 10 chips, ... to perform protein analysis with 10 ... system. Supplied are 3 x 520 ... stain, 60 microliters Pro260 ladder (10-260 ...
...
... in the submicron range are part of ... and control of particle size is important ... can reliably detect the component populations in ... Particle Size Analyzer uses Photon Correlation Spectroscopy ...
Biology Products: