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.

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 July 31, 2014 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 July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) — Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) — With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) — Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) — Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
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:
from the past week

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