Navigation Links
Columbine flowers develop long nectar spurs in response to pollinators

In flowers called columbines, evolution of the length of nectar spurs--the long tubes leading to plants' nectar--happens in a way that allows flowers to match the tongue lengths of the pollinators that drink their nectar, biologists have found.

The researchers were Justen Whittall of the University of California at Davis and Scott Hodges of the University of California at Santa Barbara. They were funded by the National Science Foundation (NSF). Their results appear in this week's issue of the journal Nature.

Darwin once proposed a co-evolutionary "race" to explain how natural selection might account for the evolution of very long nectar spurs in flowers, said Hodges. "In Darwin's race, plants with the longest spurs and pollinators with the longest tongues [to tap the flowers' nectar] would be favored by natural selection, and--in a never-ending process--continually drive the plants' spurs and the pollinator tongues to exceptionally long lengths."

But it turns out, Whittall and Hodges found, that evolution acts in a more one-sided fashion in many plants: the plants evolve nectar spurs to match the tongue-lengths of the pollinators. Then the process stops, and only starts again when there is a change in pollinators.

Whittall and Hodges proved this idea by testing the columbine genus Aquilegia, which is pollinated by bumblebees, hummingbirds and hawkmoths.

They found that most of the columbines' nectar spur length evolution happened during shifts in pollinators from bumblebees to hummingbirds, and from hummingbirds to hawkmoths. In between these shifts, evolution of the columbines' nectar spurs came to a halt.

Whittall and Hodges' work provides evidence that evolution may occur in a stop-and-go pattern--one in which adaptation to specific pollinators occurs very rapidly, followed by periods of no further evolution until another pollinator shift occurs, according to William Zamer, deputy director of NSF's divis
'"/>

Source:National Science Foundation


Page: 1 2

Related biology news :

1. Bumblebees copy one another when contending with unfamiliar flowers
2. AIDS drug from sunflowers
3. Wild bees and the flowers they pollinate are disappearing together
4. Genetic snooze button governs timing of spring flowers
5. How did bilaterally symmetric flowers evolve from radially symmetric ones?
6. A much-needed shot in the arm for HIV vaccine development
7. Clam embryo study shows pollutant mixture adversely affects nerve cell development
8. Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.
9. Scientists develop new color-coded test for protein folding
10. Zebrafish may hold key to understanding human nerve cell development
11. First real-time view of developing neurons reveals surprises, say Stanford researchers
Post Your Comments:
(Date:9/1/2014)... a life without light. They emit echolocation sounds and use ... obstacles or prey. In their brains, they have a spatial ... researchers at Technische Universitt Mnchen (TUM) has shown for the ... , Closer objects appear larger , ... the number of activated neurons in its brain increases. As ...
(Date:8/31/2014)... highly infectious bacteria C. diff , that causes ... a team at the University of Leicester. , Using ... it is possible to identify the unique ,smell, of ... diagnosis of the condition., What is more, the Leicester ... strains of the disease simply from their smell ...
(Date:8/31/2014)... in Nature Climate Change , suggests that if ... not exceed, the global targets for total greenhouse gas (GHG) ... should all think carefully about the food we choose and ... world is just one of a number of actions that ... ensure there is enough food for all. , As ...
Breaking Biology News(10 mins):Zooming in for a safe flight 2Scientists develop 'electronic nose' for rapid detection of C. diff infection 2Changing global diets is vital to reducing climate change 2Changing global diets is vital to reducing climate change 3Changing global diets is vital to reducing climate change 4
... clear change in salinity has been detected in the ... global rainfall and evaporation cycle., In a paper published ... the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and ... of salinity in the global ocean during the past ...
... scientists has found there has been a massive reduction in ... of Antarctica.,Comparing detailed measurements taken during the Australian Antarctic program,s ... back to 1970, scientists estimate there has been as much ... Antarctic Bottom Water, the cold dense water that drives global ...
... Berlin, Germany, May 21, 2012 IMPACT World+, ... methodology was launched today in Berlin, Germany during the ... Meeting. The event featured the results of this innovative ... experts and researchers from five countries., The production and ...
Cached Biology News:Earth's water cycle intensifying with atmospheric warming 2Latest Southern Ocean research shows continuing deep ocean change 2Latest Southern Ocean research shows continuing deep ocean change 3Launch of IMPACT World+ 2
(Date:8/28/2014)... A new research platform uses a ... tiny structures undergoing stress and heating, an ... designs for microelectronics and batteries., This new ... about how heating and the surface stress ... Researchers have discussed the merits of surface-stress ...
(Date:8/28/2014)... 2014  Next month, executives from clinical trial marketing firm ... beginning with Patient-Centered Clinical Trials 2014 , to be ... , September 4-5. Patient recruitment experts Bonnie A. ... will share insights on the benefits of employing an ... – from media to mobile apps – can be used ...
(Date:8/28/2014)... work by a Florida State University research team has ... your temperature, emit white light, and convert photon energy ... like a butterfly. , Biwu Ma, associate professor in ... FAMU-FSU College of Engineering, created the molecule in a ... discover that his creation has many other unique capabilities. ...
(Date:8/28/2014)... Boston, MA (PRWEB) August 28, 2014 ... of wholesale construction materials, selected SoundConnect ... of their cloud based audio and web conferencing ... configured to support PrimeSource’s employees’ needs. SoundConnect ... technologies. , PrimeSource Building Products will be ...
Breaking Biology Technology:New analytical technology reveals 'nanomechanical' surface traits 2New analytical technology reveals 'nanomechanical' surface traits 3BBK Worldwide Leads Sessions at Key September Events 2Novel 'butterfly' molecule could build new sensors, photoenergy conversion devices 2PrimeSource Chooses SoundConnect as Collaboration Provider 2
... accurately while minimizing ... 6 During his annual,physical check-up in March, David Kelver,s ... the right one looked a bit swollen. The,doctor concluded, however, ... own, and sent him home. Several months later, Kelver, a ...
... showing that Microsoft SQL Server ... 1 petabyte., REDMOND, Wash., Nov. 6 ... management and business,intelligence platform, Microsoft SQL Server 2008, ... scale new heights in data warehousing,and transaction processing., ...
... at Rodman & Renshaw,10th Annual Healthcare Conference" issued on ... over PR Newswire, we are advised by a,representative of ... the first paragraph. Complete, corrected release follows:, , ... the development of microRNA-based diagnostics, announced today it,will present ...
Cached Biology Technology:Cancer Care of Western New York Becomes First Center in Western New York to Treat Cancer with RapidArc(TM) Radiotherapy Technology from Varian Medical Systems 2Cancer Care of Western New York Becomes First Center in Western New York to Treat Cancer with RapidArc(TM) Radiotherapy Technology from Varian Medical Systems 3Cancer Care of Western New York Becomes First Center in Western New York to Treat Cancer with RapidArc(TM) Radiotherapy Technology from Varian Medical Systems 4Could Database Software Help Cure Alzheimer's and Save the Earth? 2Could Database Software Help Cure Alzheimer's and Save the Earth? 3/C O R R E C T I O N -- Rosetta Genomics Ltd/ 2/C O R R E C T I O N -- Rosetta Genomics Ltd/ 3/C O R R E C T I O N -- Rosetta Genomics Ltd/ 4/C O R R E C T I O N -- Rosetta Genomics Ltd/ 5/C O R R E C T I O N -- Rosetta Genomics Ltd/ 6
Mouse monoclonal [6C3] to JAB1 ( Abpromise for all tested applications). entrezGeneID: 10987 SwissProtID: O15386...
Human TGF-beta RIIb Affinity Purified Polyclonal Ab...
Human FGF R2 (alpha isoforms) MAb (Clone 98706)...
dithiothreitol, sulfhydryl reducing agent, C4H10O2S2; MW: 154.24, 97% pure (minimum), CAS No: 27565-41-9, store at -20 C ...
Biology Products: