Featured Research

from universities, journals, and other organizations

Patterns On Tropical Marine Mollusk Shell Mirror Gene Expression Patterns

Date:
November 28, 2006
Source:
BioMed Central
Summary:
Scientists have identified a group of genes that control the formation of shapes and color patterns on the shell of the tropical marine mollusk referred to as "abalone." A study published in the open access journal BMC Biology reveals that the shape and color patterns on the shell of the mollusc mirror the localised expression of specific genes in the mantle, a layer of skin situated just below the shell.

Picture of a juvenile H. asinina shell.
Credit: Daniel Jackson

Scientists have identified a group of genes that control the formation of shapes and colour patterns on the shell of the tropical marine mollusc referred to as 'abalone'. A study published in the open access journal BMC Biology reveals that the shape and colour patterns on the shell of the mollusc mirror the localised expression of specific genes in the mantle, a layer of skin situated just below the shell. The authors of the study identify one gene in particular that controls the formation of blue dots on the shell of the mollusc.

Related Articles


Daniel Jackson, Bernard Degnan and colleagues from the University of Queensland, Australia, collaborated with colleagues from the Department of Geobiology at the University of Gφttingen, Germany to analyse gene expression in the tropical abalone Haliotis asinina. They sequenced 530 randomly-selected genes expressed in the mantle tissue of the young abalone.

Jackson et al. identified 331 genes that encode proteins expressed in the mantle. Using a bioinformatics approach they find that 26% (85) of these genes encode secreted proteins. Jackson et al. then analysed the expression patterns of 22 of the genes encoding secreted proteins. They find that each gene is expressed in a specific, discrete area of the mantle, involved in the formation of a specific layer, shape or colouration pattern of the shell. They identify one gene in particular, Has-sometsuke, whose expression pattern maps precisely to pigmentation patterns in the shell. Blue dots on the shell of the abalone correspond to zones of high Has-sometsuke expression. By comparing the abalone DNA sequences with the genome of another related mollusc, Lottia scutum, the authors also show that genes encoding the secreted mantle proteins, which they call the 'secretome', in abalone, are likely to be rapidly evolving genes.

Jackson et al. conclude: "The unexpected complexity and evolvability of this secretome and the modular design of the molluscan mantle enables the diversification of shell strength and design, and as such must contribute to the variety of adaptive architectures and colours found in mollusc shells."


Story Source:

The above story is based on materials provided by BioMed Central. Note: Materials may be edited for content and length.


Cite This Page:

BioMed Central. "Patterns On Tropical Marine Mollusk Shell Mirror Gene Expression Patterns." ScienceDaily. ScienceDaily, 28 November 2006. <www.sciencedaily.com/releases/2006/11/061126121128.htm>.
BioMed Central. (2006, November 28). Patterns On Tropical Marine Mollusk Shell Mirror Gene Expression Patterns. ScienceDaily. Retrieved February 26, 2015 from www.sciencedaily.com/releases/2006/11/061126121128.htm
BioMed Central. "Patterns On Tropical Marine Mollusk Shell Mirror Gene Expression Patterns." ScienceDaily. www.sciencedaily.com/releases/2006/11/061126121128.htm (accessed February 26, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Thursday, February 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

The Amazon Keeps Its Green Thanks To The Sahara Desert

The Amazon Keeps Its Green Thanks To The Sahara Desert

Newsy (Feb. 25, 2015) — Satellite data shows the Amazon rainforest supports its lush flora with a little help from Sahara Desert dust. Video provided by Newsy
Powered by NewsLook.com
Mayor Says District of Columbia to Go Ahead With Pot Legalization

Mayor Says District of Columbia to Go Ahead With Pot Legalization

Reuters - News Video Online (Feb. 25, 2015) — Washington&apos;s mayor says the District of Columbia will move forward with marijuana legalization, despite pushback from Congress. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Marijuana Nowhere Near As Deadly As Alcohol: Study

Marijuana Nowhere Near As Deadly As Alcohol: Study

Newsy (Feb. 25, 2015) — A new study says marijuana is about 114 times less deadly than alcohol. Video provided by Newsy
Powered by NewsLook.com
Fox With Horrifying Injury Rescued and Released Back Into the Wild

Fox With Horrifying Injury Rescued and Released Back Into the Wild

RightThisMinute (Feb. 25, 2015) — This wounded fox knew what she was doing when she wandered into the yard of a nature photographer. The photographer got "Scamp" immediately in the hands of Wildlife Aid and she was released back into the wild in no time. Video provided by RightThisMinute
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins