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Summer diatom blooms in the eastern North Pacific gyre investigated with a long-endurance autonomous surface vehicle.
Anderson EE, Wilson C, Knap AH, Villareal TA. Anderson EE, et al. PeerJ. 2018 Aug 15;6:e5387. doi: 10.7717/peerj.5387. eCollection 2018. PeerJ. 2018. PMID: 30128189 Free PMC article.
The two taxa did not co-occur in large numbers, rather the blooms were dominated by either Hemiaulus or Rhizosolenia. The August 2-4, 2015 bloom was comprised of 96% Hemiaulus and the second bloom, August 15-17, 2015, was dominated by Rhizosolenia (75%). The hologra …
The two taxa did not co-occur in large numbers, rather the blooms were dominated by either Hemiaulus or Rhizosolenia. The August 2-4, …
Heterologous expression of genes from a cyanobacterial endosymbiont highlights substrate exchanges with its diatom host.
Nieves-Morión M, Camargo S, Bardi S, Ruiz MT, Flores E, Foster RA. Nieves-Morión M, et al. PNAS Nexus. 2023 Jun 27;2(6):pgad194. doi: 10.1093/pnasnexus/pgad194. eCollection 2023 Jun. PNAS Nexus. 2023. PMID: 37383020 Free PMC article.
In one of these symbioses, the symbiont, Richelia euintracellularis, has penetrated the cell envelope of the host, Hemiaulus hauckii, and lives inside the host cytoplasm. How the partners interact, including how the symbiont sustains high rates of N(2) fixation, is unstudi …
In one of these symbioses, the symbiont, Richelia euintracellularis, has penetrated the cell envelope of the host, Hemiaulus hauckii, …
Adaptation to an Intracellular Lifestyle by a Nitrogen-Fixing, Heterocyst-Forming Cyanobacterial Endosymbiont of a Diatom.
Flores E, Romanovicz DK, Nieves-Morión M, Foster RA, Villareal TA. Flores E, et al. Front Microbiol. 2022 Mar 17;13:799362. doi: 10.3389/fmicb.2022.799362. eCollection 2022. Front Microbiol. 2022. PMID: 35369505 Free PMC article.
The symbiosis between the diatom Hemiaulus hauckii and the heterocyst-forming cyanobacterium Richelia intracellularis makes an important contribution to new production in the world's oceans, but its study is limited by short-term survival in the laboratory. ...
The symbiosis between the diatom Hemiaulus hauckii and the heterocyst-forming cyanobacterium Richelia intracellularis makes an import …
Summer diatom blooms in the North Pacific subtropical gyre: 2008-2009.
Villareal TA, Brown CG, Brzezinski MA, Krause JW, Wilson C. Villareal TA, et al. PLoS One. 2012;7(4):e33109. doi: 10.1371/journal.pone.0033109. Epub 2012 Apr 6. PLoS One. 2012. PMID: 22493663 Free PMC article.

Generalized observations that DDA blooms occur when the mixed layer depth is < 70 m are supported, but there is no consistent relationship between mixed layer depth, bloom intensity, or composition; regional blooms between 22-34N occur within a broader temperature range (21-26

Generalized observations that DDA blooms occur when the mixed layer depth is < 70 m are supported, but there is no consistent relationshi

Diatom Biodiversity and Speciation Revealed by Comparative Analysis of Mitochondrial Genomes.
Wang Y, Liu S, Wang J, Yao Y, Chen Y, Xu Q, Zhao Z, Chen N. Wang Y, et al. Front Plant Sci. 2022 Mar 24;13:749982. doi: 10.3389/fpls.2022.749982. eCollection 2022. Front Plant Sci. 2022. PMID: 35401648 Free PMC article.
Here, we constructed complete mtDNAs of 15 diatom species including five Coscinodiscophyceae species (Guinardia delicatula, Guinardia striata, Stephanopyxis turris, Paralia sulcata, and Actinocyclus sp.), four Mediophyceae species (Hemiaulus sinensis, Odontella aurita var. …
Here, we constructed complete mtDNAs of 15 diatom species including five Coscinodiscophyceae species (Guinardia delicatula, Guinardia striat …
Endosymbiotic heterocystous cyanobacteria synthesize different heterocyst glycolipids than free-living heterocystous cyanobacteria.
Schouten S, Villareal TA, Hopmans EC, Mets A, Swanson KM, Sinninghe Damsté JS. Schouten S, et al. Phytochemistry. 2013 Jan;85:115-21. doi: 10.1016/j.phytochem.2012.09.002. Epub 2012 Oct 5. Phytochemistry. 2013. PMID: 23044080
Here we report the glycolipid composition of several marine free-living heterocystous cyanobacteria as well as the heterocystous endosymbiont Richelia intracellularis found in the biogeochemically important diatoms Hemiaulus hauckii and Hemiaulus membranaceus. In th …
Here we report the glycolipid composition of several marine free-living heterocystous cyanobacteria as well as the heterocystous endosymbion …
Isolation, growth, and nitrogen fixation rates of the Hemiaulus-Richelia (diatom-cyanobacterium) symbiosis in culture.
Pyle AE, Johnson AM, Villareal TA. Pyle AE, et al. PeerJ. 2020 Oct 8;8:e10115. doi: 10.7717/peerj.10115. eCollection 2020. PeerJ. 2020. PMID: 33083143 Free PMC article.
We document the influence of light and nutrients on nitrogen fixation and growth rates of the host diatom Hemiaulus hauckii Grunow together with its diazotrophic endosymbiont Richelia intracellularis Schmidt, as well as less complete results on the Hemiaulus membran …
We document the influence of light and nutrients on nitrogen fixation and growth rates of the host diatom Hemiaulus hauckii Grunow to …
Carbon Transfer from the Host Diatom Enables Fast Growth and High Rate of N2 Fixation by Symbiotic Heterocystous Cyanobacteria.
Inomura K, Follett CL, Masuda T, Eichner M, Prášil O, Deutsch C. Inomura K, et al. Plants (Basel). 2020 Feb 4;9(2):192. doi: 10.3390/plants9020192. Plants (Basel). 2020. PMID: 32033207 Free PMC article.
Here, we develop a coarse-grained, cellular model of the symbiosis between Hemiaulus and Richelia (one of the major DDAs), which shows that carbon (C) transfer from the diatom enables a faster growth and N(2) fixation rate by the trichomes. ...However, even with five trich …
Here, we develop a coarse-grained, cellular model of the symbiosis between Hemiaulus and Richelia (one of the major DDAs), which show …
Genomic deletions disrupt nitrogen metabolism pathways of a cyanobacterial diatom symbiont.
Hilton JA, Foster RA, Tripp HJ, Carter BJ, Zehr JP, Villareal TA. Hilton JA, et al. Nat Commun. 2013;4:1767. doi: 10.1038/ncomms2748. Nat Commun. 2013. PMID: 23612308 Free PMC article.
The genome of Richelia (found inside the siliceous frustule of Hemiaulus) is reduced and lacks ammonium transporters, nitrate/nitrite reductases and glutamine:2-oxoglutarate aminotransferase. ...
The genome of Richelia (found inside the siliceous frustule of Hemiaulus) is reduced and lacks ammonium transporters, nitrate/nitrite …
Seasonal dynamics of the endosymbiotic, nitrogen-fixing cyanobacterium Richelia intracellularis in the eastern Mediterranean Sea.
Zeev EB, Yogev T, Man-Aharonovich D, Kress N, Herut B, Béjà O, Berman-Frank I. Zeev EB, et al. ISME J. 2008 Sep;2(9):911-23. doi: 10.1038/ismej.2008.56. Epub 2008 Jun 26. ISME J. 2008. PMID: 18580972 Free article.
R. intracellularis is usually found as an endosymbiont within diatoms such as Rhizosolenia spp and Hemiaulus spp. and is an important diazotroph in marine tropical oceans. ...
R. intracellularis is usually found as an endosymbiont within diatoms such as Rhizosolenia spp and Hemiaulus spp. and is an important …
21 results