Navigation Links
Bitter-tasting nectar and floral odors optimize outcrossing for plants
Date:8/28/2008

o understand the floral biochemistry and plants' ecological interactions with their mobile visitors, the researchers generated four different lines of genetically modified wild tobacco (Nicotiana attenuata). Apart from control plants that had received only a blind copy of the transgenic DNA fragment, transgenic lines were created (by means of RNA interference) that were unable to produce either nicotine or benzyl acetone; the latter has a sweet odor we know from cocoa beans and is similar to the smell of jasmine and strawberry. A fourth line of transgenic plants could produce neither nicotine nor benzyl acetone.

After a series of control experiments in the field showed that the genetic modifications per se did not influence growth, flower formation, nectar production, or the frequency of outcrossing, the scientists ran a series of three tests: First, measurements of floral nectar showed that its volume was only half the size in transgenic plants which were impaired in nicotine production, compared to control plants and the lines that could not produce benzyl acetone as an attractant. Conclusion: Floral visitors are principally attracted by the scent, and they drink more nectar if it doesn't taste bitter. Using video cameras, the researchers confirmed this result: Both attractant-deficient lines were rarely visited by hummingbirds (e.g. Archilochus alexandri) and white-lined sphinx moths (Hyles lineata). When visitors took nectar from flowers which contained a natural amount of deterring nicotine, they stayed for a short time only, while they enjoyed the nicotine-free nectar of corresponding transgenic lines. Consequently, these flowers were visited for longer periods, especially by hummingbirds.

However, such observations do not prove that different visiting behaviors affect outcrossing and reproduction among plants. Therefore, two further analyses were performed, one focused on female fitness (production rate of seeds in the
'/>"/>

Contact: Ian T. Baldwin
baldwin@ice.mpg.de
49-175-180-4226
Max Planck Institute for Chemical Ecology
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Layered approach may yield stronger, more successful bone implants
2. Clever plants chat over their own network
3. Plants can be used to study how and why people respond differently to drugs
4. Book on weeds and invasive plants discusses how to manage them using ecological approaches
5. A greenhouse in order to study the impact of climate change on plants
6. Agent that triggers immune response in plants is uncovered
7. Scientists ramp up ability of poplar plants to disarm toxic pollutants
8. A new baseline of invasive plants in Isabela
9. Hungry microbes share out the carbon in the roots of plants
10. Scientists warn that species extinction could reduce productivity of plants on Earth by half
11. Cell transplants may improve severe urinary incontinence
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/17/2015)... June 17, 2015  Synaptics Inc. (NASDAQ: ... today announced that Xiaomi, one of the world,s ... ClearPad ® family of capacitive touchscreen ... circuits (DDICs) for its latest smartphones, the Xiaomi ... for full in-cell display solutions and DDICs in ...
(Date:6/16/2015)... Fingerprint Cards has received an order ... company,s portfolio from one of its module partners in ... place during the third quarter 2015. The sensors will be ... Jörgen Lantto, CEO of FPC, comments: " This ... interest from smartphone OEMs in integrating touch fingerprint sensors in ...
(Date:6/15/2015)... Inc. (NASDAQ: NXTD ) ("NXT-ID" or the "Company") a ... announces that its leading payment security technology, the Wocket® smart ... NYC June 18th. Digital Experience! @ NYC is ... to over 300 of the top media covering the sector. ... New York City from 6:00 to ...
Breaking Biology News(10 mins):Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 2Synaptics Touchscreen and Display Driver IC Solutions Power Xiaomi's Latest Flagship Smartphones 3FPC Receives Order for Touch Fingerprint Sensors of 375 MSEK 2Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 2Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 3
... the Amazon before the arrival of Europeans, with little ... of research led by Crystal McMichael and Mark Bush ... overturns the idea the Amazon was a cultural parkland ... vast tracts of the landscape. The Amazon Basin ...
... PHILADELPHIA Healthy humans harbor an enormous and diverse ... their intestines. These microbial partners provide beneficial aid in ... development of a healthy immune system. In a new ... David Artis, PhD, associate professor of Microbiology, and Michael ...
... descend on Virginia Tech beginning June 24 bringing with them ... boost to the Blacksburg area in excess of $2 million. ... the largest conferences ever held in Blacksburg with 13 simultaneous ... molecules macromolecules that are having a huge impact ...
Cached Biology News:Scientists reconstruct pre-Columbian human effects on the Amazon Basin 2Brothers in arms: Commensal bacteria help fight viruses 2Scientific meeting at Virginia Tech will make more than $2 million economic impact 2Scientific meeting at Virginia Tech will make more than $2 million economic impact 3
(Date:7/7/2015)... ... July 07, 2015 , ... uBiome, the leading microbial genomics company, ... microbiome sampling kits and full 16S laboratory analysis. The goal is to fast-track a ... also have access to their own dashboard, enabling them to view and compare the ...
(Date:7/7/2015)... ... July 07, 2015 , ... Since its inception in ... What began as a conference for European Statistical Programmers, has evolved in the ... biometrical area. Statistical Programmers, Data Managers and Biostatisticians all over the world, share, ...
(Date:7/7/2015)... ... July 07, 2015 , ... ... Admin system was developed to solve many of the complex logistical and ... studies that involve multiple clinical sites and/or remote data coordination centers. , ...
(Date:7/6/2015)... , ... July 06, 2015 , ... ... fields holds potential to reveal how blood flows in the brain during stroke, ... the brain. , A new article published in the journal Neurophotonics ...
Breaking Biology Technology:uBiome to Award Grant of up to $100k for Groundbreaking Microbiome Research 2uBiome to Award Grant of up to $100k for Groundbreaking Microbiome Research 3PhUSE Delighted to Welcome Member Number 5.000 2ActiGraph Launches CentrePoint Cloud-based Study Management Software Platform 2ActiGraph Launches CentrePoint Cloud-based Study Management Software Platform 3Reducing Stroke Damage May be Next Application for OCT Technology Now Widely Used in Eye and Vision Healthcare 2Reducing Stroke Damage May be Next Application for OCT Technology Now Widely Used in Eye and Vision Healthcare 3
... ... receiving earlier seasonal flu shot can double the risk of contracting the ... Health Organization and delays in the flu shot program in some of ... safety and efficacy of all flu shots along with the H1N1 pandemic ...
... , LES ULIS, France, October 14 ... Market Quantel`s 308 Excimer System for,Psoriasis and Vitiligo in the ... QUA), a leading manufacturer of solid state lasers,announced today that ... leading researcher and developer of light-based,systems for medical and cosmetic ...
... OXFORD, England, October 14 PharmaTelevision(R), ... announced that it is teaming up with the EBD ... Media Training. , Dr Fintan ... said, "Standing out and attaining share of voice is,becoming ...
Cached Biology Technology:FluStop natural flu remedy sales increase 700% with confusion about new flu shot study and H1N1 2Quantel Signs a Distribution Agreement With US-based National Biological 2PharmaTelevision Turns the Media Spotlight Upon BIO-Europe 2
... Rabbit polyclonal to Rad51 ( ... Antigen: Synthetic ... to N terminal amino acids 15-29 ... Entrez Gene ID: 5888 ...
... Sequenase Dye Primer Manual Cycle Sequencing Kit ... dye-labeled primers and high-resolution fluorescence scanners. Sequencing ... standard slab gel electrophoresis and scanning of ... products. The kit components have been ...
... performance agitation and temperature control for microbiology ... wells independently and is suitable for DASGIP ... working volume. Its temperature ranges from approximately ... well is equipped with an individual electrical ...
... SYBR Green II RNA gel stain is ... bright fluorescence when bound to RNA and low ... with either formaldehyde/agarose or polyacrylamide gels using laser ... 50 minigels. A 1 mL unit size (S-7568) ...
Biology Products: