geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Primary endosymbiosis and the evolution of light and oxygen sensing in photosynthetic eukaryotes


, : Primary endosymbiosis and the evolution of light and oxygen sensing in photosynthetic eukaryotes. Frontiers in Ecology and Evolution 2(66): -

NlmCategory="UNASSIGNED">The origin of the photosynthetic organelle in eukaryotes, the plastid, changed forever the evolutionary trajectory of life on our planet. Plastids are highly specialized compartments derived from a putative single cyanobacterial primary endosymbiosis that occurred in the common ancestor of the supergroup Archaeplastida that comprises the Viridiplantae (green algae and plants), red algae, and glaucophyte algae. These lineages include critical primary producers of freshwater and terrestrial ecosystems, progenitors of which provided plastids through secondary endosymbiosis to other algae such as diatoms and dinoflagellates that are critical to marine ecosystems. Despite its broad importance and the success of algal and plant lineages, the phagotrophic origin of the plastid imposed an interesting challenge on the predatory eukaryotic ancestor of the Archaeplastida. By engulfing an oxygenic photosynthetic cell, the host lineage imposed an oxidative stress upon itself in the presence of light. Adaptations to meet this challenge were thus likely to have occurred early on during the transition from a predatory phagotroph to an obligate phototroph (or mixotroph). Modern algae have recently been shown to employ linear tetrapyrroles (bilins) to respond to oxidative stress under high light. Here we explore the early events in plastid evolution and the possible ancient roles of bilins in responding to light and oxygen.

US$19.90

PMID: 25729749

DOI: 10.3389/fevo.2014.00066


Other references

Lopez, G.R.; Levinton, J.S.; Slobodkin, L.B., 1977: The effect of grazing by the detritivore Orchestia grillus on Spartina litter and its associated microbial community. Orchestia grillus efficiently feeds upon microorganisms attached to ingested Spartina alterniflora litter, but does not digest litter itself. Microorganisms respond to Orchestia grazing with increased metabolic activity, reflected in accelerated d...

Puckridge, D.W., 1968: Competition for light and its effect on leaf and spikelet development of wheat plants. The effect of changes in the light environment of wheat plants at different stages in their growth was examined by growing single plants in tubed and changing the spacing of the tubes (population density) during development. Individual leaves on t...

Killian, M.; Russell, A.C.; Keister, K.J., 2009: Prevention of sternal wound infections after coronary artery bypass graft surgery with use of insulin drug therapy: a review of the literature. Diabetes is a disease that can increase the risks of developing cardiac problems, which can include coronary artery bypass graft surgery. These patients are at an increased risk of developing serious complications after this surgery, including dee...

Flechtmann, C.H.W., 1989: Cocos weddelliana H. Wendl. (Palmae: Arecaceae), a new host plant for Eriophyes guerreronis (Keifer,1965) (Acari: Eriophyidae) in Brazil. Cocos weddelliana is reported as a new food plant for Eriophyes guerreronis [Aceria guerreronis] in Brazil.

Gracey, D.J.; Bell, W.R.; King, D.J., 1998: An enhancement of latent inhibition by selective CCK antagonists. Schizophrenia Research 29(1-2): 168, Jan

Mahajan, S.; Gardiner, H.; DeTar, B.; Desai, S.; Muller, B.; Johnson, N.; Briggs, W.; McDonald, F., 1977: Relationship between pulmonary functions and hemodialysis induced leukopenia?. Transactions - American Society for Artificial Internal Organs 23: 411-414

Yue, J.T.Y.; Lam, T.K.T., 2012: Lipid sensing and insulin resistance in the brain. Lipid sensing and insulin signaling in the brain independently triggers a negative feedback system to lower glucose production and food intake. Here, we discuss the underlying molecular and neuronal mechanisms of lipid sensing and insulin signalin...

Guillouf, C.; Rosselli, F.; Sjin, R.T.; Moustacchi, E.; Hoffman, B.; Liebermann, D.A., 1998: Role of a mutant p53 protein in apoptosis: characterization of a function independent of transcriptional trans-activation. Wild-type (wt) tumor suppressor p53 has been implicated in cellular radiosensitivity, mediated by its role in apoptosis and growth arrest. Intriguingly, it was observed that the temperature sensitive (ts) mutant p53val135 protein functions as a po...

Gomori, G., 1952: The complex nature of alkaline phosphatase. Alkaline phosphatase of the intestine was found to consist of 3 fractions present in variable proportions in different prepns. Two fractions were rapidly inactivated while acting on the substrate in the absence of Mg; the 3 was stable for several...

Kumar, S.M.; Syamala, D.; Sharma, K.K.; Prathibha Devi, 2004: Agrobacterium tumefaciens mediated genetic transformation of pigeonpea. Optimal protocol for efficient genetic transformation has been defined to aid future strategies of genetic engineering in pigeonpea with agronomically important genes. Transgenic pigeonpea plants were successfully produced through Agrobacterium tu...