Results 71 to 80 of about 7,938 (254)
Control of heterocyst and nitrogenase synthesis in cyanobacteria [PDF]
Journal of Bacteriology, 1979 The development of the heterocyst by filamentous nitrogen-fixing cyanobacteria provides an attractive model system for studying cellular differentiation. Heterocyst synthesis is repressed by the presence of exogenous combined nitrogen. In this report, it is shown that the tryptophan analog, D,L-7-azatryptophan (Aza-T), is capable of relieving the ...
G, Stacey +3 more
openaire +2 more sources
ABC Transporter Required for Intercellular Transfer of Developmental Signals in a Heterocystous Cyanobacterium [PDF]
, 2015 In the filamentous cyanobacterium Anabaena, patS and hetN encode peptide-derived signals with many of the properties of morphogens. These signals regulate the formation of a periodic pattern of heterocysts by lateral inhibition of differentiation. Here
Callahan, Sean M. +3 more
core +2 more sources
Coming out of the cold: Vanadium is an important player in N‐fixation in warm tropical environments
Ecology, 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
Cells, 2022 The potential of cyanobacteria to perform a variety of distinct roles vital for the biosphere, including nutrient cycling and environmental detoxification, drives interest in studying their biodiversity.
Asemgul K. Sadvakasova +10 more
doaj +1 more source
Freshwater Biology, Volume 71, Issue 4, April 2026.ABSTRACT We examine phytoplankton development and limitation in the 3‐m deep, well‐mixed water column of hypereutrophic, alkaline Lake Arresø during 50 years of improved sewage treatment that has reduced phosphorus (P) and nitrogen (N) availability and phytoplankton biomass.
Kaj Sand‐Jensen +2 more
wiley +1 more source
Molecular Plant-Microbe Interactions, 2002 The hrmA gene of the N2-fixing cyanobacterium Nostoc punctiforme functions in repressing the formation of transitory motile filaments, termed hormogonia, by plant-associated vegetative filaments.
Michael F. Cohen +4 more
doaj +1 more source
Coexistence of Communicating and Noncommunicating Cells in the Filamentous Cyanobacterium Anabaena
mSphere, 2021 Multicellularity is found in bacteria as well as in eukaryotes, and the filamentous heterocyst-forming (N ...
Sergio Arévalo +5 more
doaj +1 more source
Sedimentology, Volume 73, Issue 3, Page 706-741, April 2026.ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada +10 more
wiley +1 more source
Preventing Accidental Heterocyst Development in Cyanobacteria [PDF]
Journal of Bacteriology, 2019 The filamentous cyanobacterium Anabaena can form heterocysts specialized in N 2 fixation, mostly through a cascade of transcriptional activation in response to the nitrogen starvation signal 2-oxoglutarate.
Wei-Yue, Xing, Cheng-Cai, Zhang
openaire +2 more sources
Agrosystems, Geosciences &Environment, Volume 9, Issue 1, March 2026.Abstract Ensuring food security goals through the provision of sustainable energy and food without compromising environmental sustainability is the current requirement amid threats from climate change, uncontrolled global population, and scarcity of natural resources.
Muhammad Shahbaz Farooq +9 more
wiley +1 more source