Their previous study, published April 1 in the journal "The weirdest thing is that the sponge has actually evolved a specialized type of cells, which we called 'chemobacteriocytes,' dedicated entirely to housing and maintaining a culture of this bacterium," Donia said.

Instead, about a fifth of the bacteria's genome is directed toward pumping out toxic molecules that stop predators from eating the bacterium's home.One of the questions the team asked was whether the slug acquires not just the chemicals but also the factory -- the bacteria -- itself. Questions?Princeton University. Sea slugs use algae's bacterial ‘weapons factory’ in three-way symbiotic relationshipPrinceton researchers listen in on the chemical conversation of the human microbiomeFACULTY AWARD: Donia, Seyedsayamdost receive NIH New Innovator AwardsOnce thought unstoppable, bacterial superweapon falters with too many targets'Focused Research Teams' take on emerging opportunities in biotechnology and roboticsStudy investigates potential for gut microbiome to alter drug safety and efficacy Herbivorous sacoglossan sea slugs keep chloroplasts and other plant plastids alive from the plants they eat, and use the DNA and plans to make the sugars they produce from photosynthesis for their own nutrition. The team found that the bacteria have become so dependent on their algal home that they cannot survive on their own. Zan and Li share co-first-authorship on the study. Through this method they identified the new bacterial species and linked it to the production of the toxins.The team found that the bacterial species, which they named Candidatus Endobryopsis kahalalidefaciens, produces about 15 or so different toxins, known as kahalalides. ScienceDaily. The symbiotic relationship between sea slug and algae is mutualism because both have benefited with each other. The toxic chemicals, kahalalides, are actually made by bacteria that live inside the algae. "This is very strange, given the small number of specialized sponge cells in general. They sequenced the collective genomic information of the slugs, algae and their microbiomes, which are the bacteria that live inside these organisms. ScienceDaily, 27 June 2019. The team found that the bacteria have become so dependent on their algal home that they cannot survive on their own.

It is not intended to provide medical or other professional advice.Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.Financial support for ScienceDaily comes from advertisements and referral programs, where indicated. In this example, the slug gets food and defensive chemicals, the algae get chemicals, and the bacteria get a home and free meals for life in the form of nutrients from their algae host.
"The team compared the bacteria to a factory because the organism consumes raw materials in the form of amino acids supplied from the algae and releases a finished product in the form of toxic chemicals.This theme of specialized bacterial symbionts that have evolved to perform one function -- to make defensive molecules for the host in exchange for a protected living space -- appears to be surprisingly common in the marine environment, from algae to tunicates to sponges, Donia said.This is the second such relationship the team has identified. Through this method they identified the new bacterial species and linked it to the production of the toxins.The team found that the bacterial species, which they named The researchers also discovered that the bacteria have permanently sacrificed their independence for a life of security, as they no longer possess the genes required for survival outside the algae. .Princeton University. "Sea slugs use algae's bacterial 'weapons factory' in three-way symbiotic relationship." ScienceDaily shares links with scholarly publications in the Content on this website is for information only. Sea slugs use algae's bacterial 'weapons factory' in three-way symbiotic relationship.

Algae are aquatic organisms that produce their own food from sunlight, carbon dioxide and water, through photosynthesis. © 2020 The Trustees of Princeton University