Featured Research

from universities, journals, and other organizations

Cellular Organelle Evolved Repeatedly

Date:
July 26, 2001
Source:
Netherlands Organization For Scientific Research
Summary:
NWO researchers have discovered that in the course of evolution hydrogenosomes repeatedly evolved from mitochondria. Hydrogenosomes, or ‘hydrogen-forming organelles’, are cell organelles that produce hydrogen and energy. They serve as an alternative energy supply in organisms that live without oxygen, such as anaerobic fungi and protozoa.

NWO researchers have discovered that in the course of evolution hydrogenosomes repeatedly evolved from mitochondria. Hydrogenosomes, or ‘hydrogen-forming organelles’, are cell organelles that produce hydrogen and energy. They serve as an alternative energy supply in organisms that live without oxygen, such as anaerobic fungi and protozoa.

The microbiologists believe that hydrogenosomes evolved from mitochondria as a result of a drastic ecological change. Protozoans and fungi, which until then had lived in an oxygen-rich environment, found themselves in a completely anoxic environment. Without oxygen the potential of the mitochondria to produce energy is rather limited.

In order to survive, the micro-organisms evolved several alternative means of energy production. One way of doing this was to convert mitochondria into hydrogenosomes. This required genetic material from bacteria that can survive in an anoxic environment. This genetic material was transferred from one micro-organism to another by means of ‘lateral gene transfer’.

The research team compared the hydrogenosomes of various protozoans and anaerobic fungi and discovered that the contents and form of these cell organelles differ from species to species. The hydrogenosomes of Nyctotherus ovalis, a protozoan from the gut of the cockroach, still very much resemble mitochondria. Those of Neocallimastix and Piromyces, fungi from the gut of the llama and the Indian elephant, look entirely different.

Besides the differences, there are also many points of similarity between the hydrogenosomes of different species. The researchers concluded that the hydrogenosomes of the different species constantly evolved anew from mitochondria in the course of evolution.


Story Source:

The above story is based on materials provided by Netherlands Organization For Scientific Research. Note: Materials may be edited for content and length.


Cite This Page:

Netherlands Organization For Scientific Research. "Cellular Organelle Evolved Repeatedly." ScienceDaily. ScienceDaily, 26 July 2001. <www.sciencedaily.com/releases/2001/07/010726101732.htm>.
Netherlands Organization For Scientific Research. (2001, July 26). Cellular Organelle Evolved Repeatedly. ScienceDaily. Retrieved September 1, 2014 from www.sciencedaily.com/releases/2001/07/010726101732.htm
Netherlands Organization For Scientific Research. "Cellular Organelle Evolved Repeatedly." ScienceDaily. www.sciencedaily.com/releases/2001/07/010726101732.htm (accessed September 1, 2014).

Share This




More Plants & Animals News

Monday, September 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Washington Wildlife Center Goes Nuts Over Baby Squirrels

Washington Wildlife Center Goes Nuts Over Baby Squirrels

Reuters - US Online Video (Aug. 30, 2014) An animal rescue in Washington state receives an influx of orphaned squirrels, keeping workers busy as they nurse them back to health. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Experimental Ebola Drug ZMapp Cures Lab Monkeys Of Disease

Experimental Ebola Drug ZMapp Cures Lab Monkeys Of Disease

Newsy (Aug. 29, 2014) In a new study, a promising experimental treatment for Ebola managed to cure a group of infected macaque monkeys. Video provided by Newsy
Powered by NewsLook.com
Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) 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