HOME >> BIOLOGY >> NEWS
Can a taste for poison drive speciation?

The endless struggle for survival in nature inevitably boils down to finding food and eluding predators. To avoid the latter, many plants produce chemical weapons to discourage predators. A sound strategy overall, but the rules of co-evolutionary war suggest that an herbivore will evolve resistance to the toxic defenses of plants. The fruit fly Drosophila sechellia, for example, has a penchant for the fruit of a Polynesian shrub called Tahitian Noni (Morinda citrifolia) that smells so foul it's nicknamed 'vomit fruit.' Other Drosophila species treat the rank odor, which arises from the toxins hexanoic acid and octanoic acid, as a warning sign to stay away. And with good reason-if they alight on Tahitian Noni's fruit, they die. But D. sechellia blithely homes in on the malodorous fruit to lay its eggs, ensuring a bounteous meal for its larval offspring. D. sechellia's resistance to a plant that kills likely competitors gives the fly nearly exclusive access to its host-a distinct ecological advantage. But it also raises an important question for evolutionary biologists: are the factors that promote specialized ecological interactions between herbivore and plant host sufficient to drive herbivore speciation?

In a new study, published by PLoS Bioogy, Takashi Matsuo, Yoshiaki Fuyama, and colleagues explored the genetic factors underlying the behavioral differences between D. sechellia and other Drosophila species. Taking advantage of the robust genetic tools offered by D. melanogaster, the researchers traced the flies' divergent host-plant preferences to two olfactory genes, odorant-binding protein 57e (Obp57e) and Obp57d. Their findings suggest that as the expression patterns of these genes changed in D. sechellia, the fly lost the impulse to avoid Tahitian Noni, allowing an adaptive shift to this previously proscribed plant.

The researchers generated lines of "knock-out" flies that lacked either Obp57e genes, adjacent Obp57d genes, or both (cal
'"/>

Contact: Natalie Bouaravong
press@plos.org
415-568-3445
Public Library of Science
23-Apr-2007


Page: 1 2

Related biology news :

1. Sour taste make you pucker? It may be in your genes
2. Halos and horns: Fixing the taste of diet soda
3. New findings in smell and taste
4. Termites get the vibe on what tastes good
5. Studies of population genetics, evolution are an exercise in bad taste
6. Penn researchers discover initial steps in the development of taste
7. A human taste for rarity spells disaster for endangered species
8. Honey bee chemoreceptors found for smell and taste
9. Gene key to taste bud development identified
10. Bitter taste identifies poisons in foods
11. Researchers identify taste receptor responsible for caffeine detection

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/15/2017)...   ivWatch LLC , a medical device company focused on ... receipt of its ISO 13485 Certification, the global standard for medical ... Standardization (ISO®). ... Continuous Monitoring device for the early detection of IV infiltrations. ... "This is an important milestone for ivWatch, as ...
(Date:6/14/2017)... IBM ) is introducing several innovative partner startups at VivaTech ... startups and global businesses, taking place in Paris ... will showcase the solutions they have built with IBM Watson ... France is one of the most dynamic ... in the number of startups created between 2012 and 2015*, ...
(Date:5/6/2017)... , May 5, 2017 RAM ... announced a new breakthrough in biometric authentication based ... quantum mechanical properties to perform biometric authentication. These new ... semiconductor material created by Ram Group and its ... entertainment, transportation, supply chains and security. Ram Group ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... Diego, CA (PRWEB) , ... ... ... (https://www.onramp.bio/ ) has launched Rosalind™, the first-ever genomics analysis platform specifically ... all bioinformatics complexity. Named in honor of pioneering researcher Rosalind Franklin, who ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is ... and 8th June 2018 in San Francisco, CA. The Summit brings together current and ... distinguished CEOs, board directors and government officials from around the world to address key ...
(Date:10/11/2017)... ... 11, 2017 , ... Disappearing forests and increased emissions are the main causes ... each year. Especially those living in larger cities are affected by air pollution related ... the most pollution-affected countries globally - decided to take action. , “I knew I ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... company advancing targeted antibody-drug conjugate (ADC) therapeutics, today confirmed licensing rights that ... Polymerized Liposomal Nanoparticle), a technology developed in collaboration with Children’s Hospital Los ...
Breaking Biology Technology:
Cached News: