Results 81 to 90 of about 23,202 (197)

Raman Line Scan Analyses and a New Hypothesis for the Formation of Anatase‐Hosting Microbialites: Study of the Stromatolites From Saint‐Jean‐de‐la‐Rivière, Cotentin, France

open access: yesJournal of Raman Spectroscopy, Volume 57, Issue 8, Page 1463-1480, August 2026.
Micrometer analysis of millimeter lines of Raman spectra concludes in the association of anatase and graphitized organic matter (graphogen). The photosynthetic microorganisms at the origin of the microbialites produce O2, which is transformed by TiO2 into reactive species that, in turn, decompose the organic matter of the microorganisms. ABSTRACT Raman
Marie‐Paule Bassez
wiley   +1 more source

Allelopathic effect of Ulva intestinalis L. on the Baltic filamentous cyanobacterium Nostoc sp.

open access: yesAnnales Universitatis Paedagogicae Cracoviensis Studia Naturae, 2018
Allelopathy is a prevalent natural phenomenon in aquatic ecosystem. We reported the effects of the green macroalga Ulva intestinalis L. collected from estuaries of the Baltic Sea (Poland) on the growth and chlorophyll fluorescence of common filamentous ...
Gracjana Budzałek   +2 more
doaj   +1 more source

Phosphate modulates elemental and macromolecular composition of unicellular nitrogen‐fixing cyanobacteria

open access: yesLimnology and Oceanography, Volume 71, Issue 8, August 2026.
Abstract The C : N : P of nitrogen‐fixing cyanobacteria regulates phosphate‐limited nitrogen fixation in the ocean yet the causes and range in variation C : N : P is not well constrained. Here we quantify the C : N : P and underlying macromolecular composition of Crocosphaera.
Sing‐how Tuo   +4 more
wiley   +1 more source

Salinity induced responses in the marine cyanobacterium Anacystis dimidiata

open access: yesCiencias Marinas, 1993
Growth and changes in biochemical composition were studied in the marine cyanobacterium Anacystis dimidiata, collected from a mangrove environment where salinities ranged from 5 to 40ppt. The cyanobacterium showed optimum growth at 2ppt salinity. At Iow
CSV Ramachandra-Rao, K Krishnamurthy
doaj   +1 more source

Transient Ecological Niches for Diazotrophs in Upwelling Bays

open access: yesJournal of Geophysical Research: Oceans, Volume 131, Issue 8, August 2026.
Abstract Diazotrophs, microorganisms capable of fertilizing the ocean through biological nitrogen fixation (BNF), are widespread in the oceans, including upwelling bays. However, their ability to respond to short‐lived upwelling pulses, lasting only a few days, remains poorly understood. To investigate diazotrophy across temporal scales, we analyzed 18 
D. Fernández‐Román   +13 more
wiley   +1 more source

Nutrient enrichment destabilizes aquatic food webs through synchronization within and across trophic levels

open access: yesFunctional Ecology, Volume 40, Issue 8, Page 2475-2489, August 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Nutrient enrichment destabilizes ecosystems globally, but the mechanistic pathways underlying this effect in multi‐trophic communities remain unclear. To address this knowledge gap, we applied biodiversity–stability theory to multi‐trophic communities by partitioning ...
Libin Zhou   +12 more
wiley   +1 more source

Exploring thylakoid emergence: evolution of membrane biogenesis and photosystem II assembly in early‐diverging cyanobacteria

open access: yesNew Phytologist, Volume 251, Issue 3, Page 1329-1343, August 2026.
Overview of the results. Phylogenetic analyses of 36 assembly factors of photosystem II (PSII) and 13 proteins involved in membrane dynamics summarized in Siebenaller & Schneider (2023) were performed to investigate the taxonomic distributions and structural differences between the thylakoid‐less Gloeobacterales and the Phycobacteria. Summary Thylakoid
Louise Hambücken   +2 more
wiley   +1 more source

The effect of acidity at limited irradiance on survival, growth, pigment composition and ammonium liberation of soil cyanobacterium Nostoc sp., collected from paddy-fields of Golestan province [PDF]

open access: yesفیزیولوژی محیطی گیاهی, 2007
Cyanobacterium Nostoc sp. can be considered as an interesting microorganism for the ability of excretion buffering compounds. With respect to possible applied potential of this strain, this ability has been studied under limited irradiance.
f Amirlatifi   +3 more
doaj  

The Transcriptional Cycle Is Suited to Daytime N2 Fixation in the Unicellular Cyanobacterium “Candidatus Atelocyanobacterium thalassa” (UCYN-A)

open access: yesmBio, 2019
Symbiosis between a marine alga and a N2-fixing cyanobacterium (Cyanobacterium UCYN-A) is geographically widespread in the oceans and is important in the marine N cycle. UCYN-A is uncultivated and is an unusual unicellular cyanobacterium because it lacks
María del Carmen Muñoz-Marín   +5 more
doaj   +1 more source

Vestigial Plastids in Parasitic Plants: Evolutionary Remnants or Adaptive Innovations?

open access: yesPlant, Cell &Environment, Volume 49, Issue 8, Page 5401-5420, August 2026.
ABSTRACT Throughout the evolutionary history of plants, chloroplasts originating from a cyanobacterial endosymbiosis have undergone remarkable adaptation and specialization, giving rise to a multitude of plastid types. The evolution toward parasitism in plants represents a particularly extreme case of such specialization.
Laia Jené, Sergi Munné‐Bosch
wiley   +1 more source

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