Results 71 to 80 of about 25,066 (220)

Coming out of the cold: Vanadium is an important player in N‐fixation in warm tropical environments

open access: yesEcology, Volume 107, Issue 4, April 2026.
Abstract Nitrogen (N)‐fixation is a crucial source of reactive N in terrestrial environments. The nitrogenase enzyme (Nase), responsible for this conversion, has three isoforms: molybdenum (Mo)‐, vanadium (V)‐, and iron (Fe)‐Nases. The Mo‐Nase is found in all N‐fixers, but the distribution pattern and drivers of V‐ and Fe‐Nases remain poorly understood.
Ana Fávaro   +4 more
wiley   +1 more source

Complete Genomes of Symbiotic Cyanobacteria Clarify the Evolution of Vanadium-Nitrogenase. [PDF]

open access: yes, 2019
Plant endosymbiosis with nitrogen-fixing cyanobacteria has independently evolved in diverse plant lineages, offering a unique window to study the evolution and genetics of plant-microbe interaction.
Guadalupe, Yessenia A   +7 more
core   +1 more source

Oxylipin formation in Nostoc punctiforme (PCC73102)

open access: yesPhytochemistry, 2007
The dioxygenation of polyunsaturated fatty acids is mainly catalyzed by members of the lipoxygenase enzyme family in flowering plants and mosses. Lipoxygenase products can be metabolized further and are known as signalling substances that play a role in plant development as well as in plant responses to wounding and pathogen attack.
Lang, Imke, Feussner, Ivo
openaire   +3 more sources

Phytochemical Diversity, Nutritional Values, and Biological Properties of Halopithys incurva (Hudson) Batters, 1902

open access: yesFood Science &Nutrition, Volume 14, Issue 4, April 2026.
Halopithys incurva is a red macroalga distributed across the Mediterranean Sea and North‐East Atlantic, with occasional reports from the Indian Ocean. It exhibits a rich chemical diversity, including isoflavones, bromophenols, MAAs, pigments, phycobiliproteins, primary metabolites, and neuroactive compounds.
Youssra Aalilou   +9 more
wiley   +1 more source

Extraction, structure, and biological activities of polysaccharides from Nostoc sphaeroides kützing: a review

open access: yesShipin yu jixie
Nostoc sphaeroides kützing is a freshwater wild blue algae that has gained significant attention due to its unique nutritional value and multiple biological activities.
LI Shanyu   +3 more
doaj   +1 more source

Some Studies on Circadian Rhythm in the Culture of Omphalina Quelet sp. (Basidiomycota, Agaricales) A Mycobiont of an Unidentified Basidiolichen [PDF]

open access: yes, 2010
This paper reports the discovery of circadian rhythm in Omphalina Quelet, in pure culture under laboratory conditions.
Jyoti Kalangutkar, Nandkumar Kamat
core   +2 more sources

Osmotic signaling governs sunscreen biosynthesis to safeguard desert cyanobacteria against desiccation

open access: yesmLife, Volume 5, Issue 2, Page 164-179, April 2026.
Abstract Mycosporine‐like amino acids (MAAs) are natural sunscreens synthesized by a wide range of organisms. Although the induction of MAA production by ultraviolet radiation is well established, the signaling pathways involved and specific functions of MAAs under other stress conditions remain poorly understood.
Lei Zhao   +7 more
wiley   +1 more source

Comparación del crecimiento y Composición Bioquímica de cuatro cepas de Nostoc y Anabaena (Cyanobacteria, Nostocales) en relación con el nitrato de sodio

open access: yesActa Biológica Colombiana, 2016
La concentración de nitrógeno constituye un parámetro esencial en cultivos de cianobacterias para la producción de biomasa enriquecida con fines biotecnológicos.
Néstor Rosales Loaiza   +3 more
doaj   +1 more source

Green Synthesis of ZnO Nanoparticles From Spirulina platensis: Antimicrobial and Cytotoxic Evaluation With Molecular Docking Studies

open access: yesChemistryOpen, Volume 15, Issue 4, April 2026.
Algal‐extract‐derived ZnO nanoparticles show shape anisotropy and are bio capped by phytochemicals. These green‐synthesized NPs strongly inhibit S. aureus and K. pneumoniae biofilms. Molecular docking suggests stable binding of surface biomolecules to microbial targets, highlighting synergistic antibacterial mechanisms.
Muhammad Rizwan   +8 more
wiley   +1 more source

Biología y Manejo de Nostoc (Cyanobacteria) en Viveros e Invernaderos

open access: yesEDIS, 2019
Una de las especies de "malezas" más problemáticas en los viveros de Florida es Nostoc, una cianobacteria que se encuentra comúnmente en los caminos de grava, pasillos, telas de tierra y en muchas otras áreas de producción.
Haywood Dail Laughinghouse   +3 more
doaj  

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