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

ovary), the other on male fitness (successful pollination of neighboring plants).

To determine female fitness, the flowers of the four transgenic plant lines were emasculated by removing the anthers. This enabled the researchers to measure only animal-mediated fertilization success rates, because self-pollination was prevented a method utilized by plant breeders. It could be shown that only the control plants were normally cross-pollinated by pollen of the surrounding wild-grown tobacco plants, whereas the transgenic nicotine- and benzyl acetone-deficient lines could only produce less than half of the seeds.

The scientists measured the male fitness of the four transgenic lines by emasculating flowers of plants and subsequently determining the origin of pollen which had fertilized their seeds with DNA probes. This paternity test allowed scientists to identify which of the transgenic plant lines were most successful at passing their pollen along to neighboring plants. Here it could also be shown that the control plants producing natural amounts of nicotine and benzyl acetone were the most potent ones; the big losers (almost five times less of cross-fertilized seeds) were the plants that produced neither nicotine nor benzyl acetone.

Interestingly, during the growing season, the male fertilization success switched from the attractant (benzyl acetone)-deficient to the nicotine-deficient plants. In other words: The influence of nicotine in the nectar on successful pollinator-mediated fertilization of tobacco plants decreased continuously, whereas the attractant became more and more important. These measurements were confirmed by video recordings which showed that early in the year, when hummingbirds visit tobacco, nicotine in the nectar causes them to drink less of the bitter nectar, and in turn visit other flowers, thus increasing pollen transfer. Later in the year, moths visit frequently, attracted by the odor of benzyl acetone. The bitter
'/>"/>

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:8/20/2014)... honeybees grows to about 4,000 members, it triggers an ... of a special type of comb used for rearing ... the Department of Neurobiology and Behaviour at Cornell University, ... cycle of honeybee colonies. The results are published in ... . , Reproduction isn,t always a honeybee colony,s ...
(Date:8/20/2014)... POINT ROBERTS, Washington , August 20, 2014 /PRNewswire/ ... in Addressing Security Concerns in the Payment Industry?   ... covering leading sectors including biometrics, issues commentary from analysts and ... Jason Peaslee , Managing Partner at Thrive Analytics, Isabelle ... , CEO of NXT-ID, Inc. (OTCBB: NXTD) ( OTCQB:NXTD ), ...
(Date:8/19/2014)... 19, 2014 To improve students, chances of ... the University of Houston (UH) implemented a comprehensive ... at risk for failure. , Through a ... (THECB), the Department of Biology and Biochemistry embarked ... taking "General Biology" for non-majors and "Introductory Biology" ...
Breaking Biology News(10 mins):Worker bees 'know' when to invest in their reproductive future 2Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 2Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 3Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 4Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 5Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 6Digital Wallets for a Digital World - the Players and the Concerns for Consumer Adoption 7University of Houson program earns kudos for improving grades, retaining students 2University of Houson program earns kudos for improving grades, retaining students 3
... anti-cancer therapy by blocking the molecular motors involved in ... by young Dutch researcher Dr. Nynke Dekker in one ... the European Science Foundation (ESF) and the European Heads ... are trying to stop tumor development by interfering with ...
... tea dramatically boosted production of a group of ... of these beneficial proteins, according to researchers at ... in the August issue of Cancer Epidemiology, Biomarkers ... for Cancer Research, suggest that a green tea ...
... be harmful, if not deadly. While the desire for these ... play an important role. The etiology of these desires is ... Adoption and twin studies have shown that the use of ... provided evidence that ones sex can influence the genetic factors ...
Cached Biology News:ESF EURYI award winner aims to stop cancer cells reading their own DNA 2Green tea boosts production of detox enzymes, rendering cancerous chemicals harmless 2Does the desire to consume alcohol and tobacco come from our genetic makeup? 2Does the desire to consume alcohol and tobacco come from our genetic makeup? 3
(Date:8/21/2014)... Ontotext S4 , The Self ... . Now the same enterprise hardened text mining, ... unstructured data is available to start-ups and mid-size businesses ... Organizations that do not have resources to evaluate and ... S4 since there is no need for on premise ...
(Date:8/21/2014)... August 21, 2014 SoundConnect ... been recognized as one of the nation’s Fastest ... magazine for the 2nd consecutive year. Inc. magazine ... annual Inc. 500|5000, an exclusive ranking of the ... most comprehensive look at the most important segment ...
(Date:8/20/2014)... RALEIGH, N.C. , Aug. 20, 2014 /PRNewswire/ ... clinical research services located in Raleigh, ... Bradford Evans as Vice President of ... Administration, Brad will oversee all corporate processes, including ... to joining Clintrax Global, Brad worked as an ...
(Date:8/20/2014)... often have it that American Indians largely were wiped ... influenza and tuberculosis brought to the New World by ... 20 million people lived in the Americas shortly before ... killed by European diseases., But new research led by ... Johannes Krause of the University of Tubingen in Germany ...
Breaking Biology Technology:Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 2Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 3Ontotext Releases Text Mining & Semantic Technology Running in the Cloud – Welcome to “S4? 4SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 3Clintrax Global, Inc. Announces Addition to Executive Team 2Unusual discovery leads to fascinating tuberculosis theory 2Unusual discovery leads to fascinating tuberculosis theory 3
... SyntheMed, Inc. (OTC Bulletin Board: SYMD), a biomaterials company ... announced today that the company was recently nominated for ... pediatrics. The company is among three nominated ... analysts in recognition of the development of REPEL-CV(TM) Bioresorbable ...
... , ROCKVILLE, Md., June 23 MacroGenics, Inc. announced today ... company,s Board as an independent director. Mr. Costa is ... Corporation. With more than 35 years of experience in ... valuable expertise to the MacroGenics Board. , , "We ...
... the safety and integrity of the pharmaceutical supply chain ... Inc. announced today that it has received Verified Accredited ... Boards of Pharmacy (NABP) for its Woburn, Massachusetts facility. ... Beverly facility. The NABP developed VAWD in response to ...
Cached Biology Technology:SyntheMed Receives Frost & Sullivan Health Innovation Award Nomination 2Paulo F. Costa Joins MacroGenics Board of Directors 2Paulo F. Costa Joins MacroGenics Board of Directors 3CutisPharma, Inc. Receives Verified Accreditation for Wholesale Distributors from the National Association of Boards of Pharmacy for Woburn Facility 2
Mouse TREM-2 Affinity Purified Polyclonal Ab...
Human GATA-2 Affinity Purified Polyclonal Ab...
... R4 is the lowest priced, full ring ... world. Despite the microPET R4 low ... in all performance categories; count rate performance, ... microPET is a dedicated small animal PET ...
...
Biology Products: