Yellow-stained oikopleurid appendicularians are caused by bacterial parasitism

Flood, PR

doi:10.3354/meps071291

Cited by 4 publications

(2 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two types of infection are common and easily detected by eye. The first, a bacterial infection, is manifested by a whitish-yellow appearance of the animals ( Flood, 1991 ). The second is the ectoparasite Oodinium pouchetti (Lemmermann, 1899), appearing as pink balls on the tail of the animal ( Fenaux and Gorsky, 1979 ).…”

Section: Methods and Resultsmentioning

confidence: 99%

Culture optimization for the emergent zooplanktonic model organism Oikopleura dioica

Bouquet¹,

Spriet²,

Troedsson

et al. 2009

Journal of Plankton Research

119

View full text Add to dashboard Cite

The pan-global marine appendicularian, Oikopleura dioica, shows considerable promise as a candidate model organism for cross-disciplinary research ranging from chordate genetics and evolution to molecular ecology research. This urochordate, has a simplified anatomical organization, remains transparent throughout an exceptionally short life cycle of less than 1 week and exhibits high fecundity. At 70 Mb, the compact, sequenced genome ranks among the smallest known metazoan genomes, with both gene regulatory and intronic regions highly reduced in size. The organism occupies an important trophic role in marine ecosystems and is a significant contributor to global vertical carbon flux. Among the short list of bona fide biological model organisms, all share the property that they are amenable to long-term maintenance in laboratory cultures. Here, we tested diet regimes, spawn densities and dilutions and seawater treatment, leading to optimization of a detailed culture protocol that permits sustainable long-term maintenance of O. dioica, allowing continuous, uninterrupted production of source material for experimentation. The culture protocol can be quickly adapted in both coastal and inland laboratories and should promote rapid development of the many original research perspectives the animal offers.

show abstract

Section: Methods and Resultsmentioning

confidence: 99%

Culture optimization for the emergent zooplanktonic model organism Oikopleura dioica

Bouquet¹,

Spriet²,

Troedsson

et al. 2009

Journal of Plankton Research

119

View full text Add to dashboard Cite

show abstract

“…In general, tunicate associated bacteria and fungi are known to produce a variety of MNPs with various biological properties [41]. The chemistry of yellow pigment-producing parasitic bacteria in the interstitial and blood-filled spaces of planktonic tunicates, Oikopleura vanhoeffeni and Oikopleura dioica, are yet to be characterized [51].…”

Section: Profile Of Mnps From Tunicates and Associated Microbesmentioning

confidence: 99%

Marine Natural Products from Tunicates and Their Associated Microbes

Ramesh

Tulasi²,

Mohanraju

et al. 2021

Marine Drugs

View full text Add to dashboard Cite

Marine tunicates are identified as a potential source of marine natural products (MNPs), demonstrating a wide range of biological properties, like antimicrobial and anticancer activities. The symbiotic relationship between tunicates and specific microbial groups has revealed the acquisition of microbial compounds by tunicates for defensive purpose. For instance, yellow pigmented compounds, “tambjamines”, produced by the tunicate, Sigillina signifera (Sluiter, 1909), primarily originated from their bacterial symbionts, which are involved in their chemical defense function, indicating the ecological role of symbiotic microbial association with tunicates. This review has garnered comprehensive literature on MNPs produced by tunicates and their symbiotic microbionts. Various sections covered in this review include tunicates’ ecological functions, biological activities, such as antimicrobial, antitumor, and anticancer activities, metabolic origins, utilization of invasive tunicates, and research gaps. Apart from the literature content, 20 different chemical databases were explored to identify tunicates-derived MNPs. In addition, the management and exploitation of tunicate resources in the global oceans are detailed for their ecological and biotechnological implications.

show abstract

Architecture of, and water circulation and flow rate in, the house of the planktonic tunicateOikopleura labradoriensis

Flood

1991

Mar. Biol.

View full text Add to dashboard Cite

Abstract. The gelatinous house of Oikopleura labradoriensis (Tunicata, Appendicularia), collected from the docks of Friday Harbor Laboratories, University of Washington, USA, in 1984USA, in , 1986USA, in and 1990, was examined in vivo by stereomicroscopy and strobe-light macrophotography, and after fixation and processing for light and electron microscopy. In addition to confirming previous knowledge and adding new information on structural organization of the oikopleurid house, this study presents quantitative data on important aspects of its function. Particles small enough to pass through the inlet filters (pore width ~ 13 gin) were concentrated between differently constructed upper and lower food-concentrating filters (pore widths 0.18 and 0.24 gm, respectively). These filtes were held together by an intermediary screen of widely separated ribbon-like filaments. Water sieved through the filters left the house through a pressure-regulated exit valve. However, the intermittent activity of the tail pump and the elasticity of the house caused frequent refluxes of water that cleared both inlet filters and foodconcentrating filter screens of adhering particles. During these refluxes the food-concentrating filters usually collapsed and compacted the trapped particles into coarser aggregates. With each pumping cycle the particles and aggregates were brought closer to the midline. From here they were periodically drained into the mouth of the organism through a medial food-collecting tube, to be recaptured in a pharyngeal feeding filter secreted by the organism's endostyle. Based on the size and movements of the tail within the close-fitting tail chamber, a water flow rate of ~ 0.84 ml min-1 was calculated for medium-sized houses (belonging to individuals with trunk length of ca.

show abstract

Yellow-stained oikopleurid appendicularians are caused by bacterial parasitism

Cited by 4 publications

References 3 publications

Culture optimization for the emergent zooplanktonic model organism Oikopleura dioica

Culture optimization for the emergent zooplanktonic model organism Oikopleura dioica

Marine Natural Products from Tunicates and Their Associated Microbes

Architecture of, and water circulation and flow rate in, the house of the planktonic tunicateOikopleura labradoriensis

Contact Info

Product

Resources

About