keyword
MENU ▼
Read by QxMD icon Read
search

nutrients dynamic

keyword
https://www.readbyqxmd.com/read/28441589/nutrient-stress-induced-chromatin-changes-in-plants
#1
REVIEW
David Secco, James Whelan, Hatem Rouached, Ryan Lister
The ability of plants to appropriately respond to the soil nutrient availability is of primary importance for their development and to complete their life cycle. Deciphering these multifaceted adaptive mechanisms remains a major challenge for scientists to date. Recent technological breakthroughs now enable to assess the dynamism and complexity of these processes at unprecedented resolution. In this review, we present some of the most recent findings on the involvement of histone modifications, histone variants and DNA methylation in response to nutrient stresses as well as discussing the potential roles these chromatin changes could serve as priming or as trans-generational stress memory mechanisms...
April 22, 2017: Current Opinion in Plant Biology
https://www.readbyqxmd.com/read/28440077/molecular-dynamics-simulations-of-the-standard-leonardite-humic-acid-microscopic-analysis-of-the-structure-and-dynamics
#2
Drazen Petrov, Daniel Tunega, Martin H Gerzabek, Chris Oostenbrink
Humic substances (HS) are abundant in the environment and play an important role in a number of biogeochemical processes including microbial activity, soil aggregation, plant growth, the retention and release of nutrients, the environmental fate of pollutants and carbon storage. They are flexible, relatively small molecules forming supramolecular structures through weak interactions. Despite the great importance of understanding their behavior at the atomic level, computational modeling, a premier high-resolution technique providing great level of detail, has been surprisingly little employed to study humic substances...
April 25, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28438021/a-new-improved-and-extended-version-of-the-multicell-bacterial-simulator-gro
#3
Martín Eduardo Gutiérrez, Paula Gregorio-Godoy, Guillermo Pérez Del Pulgar, Luis Enrique Muñoz, Sandra Sáez, Alfonso Rodriguez-Paton
gro is a cell programming language developed in Klavins Lab for simulating colony growth and cell-cell communication. It is used as a synthetic biology prototyping tool for simulating multicellular biocircuits. In this work, we present several extensions made to gro that improve the performance of the simulator, make it easier to use and provide new functionalities. The new version of gro is between one and two orders of magnitude faster than the original version. It is able to grow microbial colonies with up to 10(5) cells in less than 20 minutes...
April 24, 2017: ACS Synthetic Biology
https://www.readbyqxmd.com/read/28437774/bacterial-community-dynamics-and-functional-variation-during-the-long-term-decomposition-of-cyanobacterial-blooms-in-vitro
#4
Limei Shi, Yaxin Huang, Min Zhang, Yang Yu, Yaping Lu, Fanxiang Kong
Cyanobacterial blooms drastically influence carbon and nutrient cycling in eutrophic freshwater lakes. To understand the mineralization process of cyanobacteria-derived particulate organic matter (CyanPOM), the aerobic degradation of cyanobacterial blooms dominated by Microcystis sp. was investigated over a 95-day microcosm experiment. Approximately 91%, 95% and 83% of the initial particulate organic carbon (POC), particulate organic nitrogen (PON), and particulate organic phosphorus (POP) were decomposed, respectively...
April 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28433918/chronic-responses-of-aerobic-granules-to-zinc-oxide-nanoparticles-in-a-sequencing-batch-reactor-performing-simultaneous-nitrification-denitrification-and-phosphorus-removal
#5
Qiulai He, Shuxian Gao, Shilu Zhang, Wei Zhang, Hongyu Wang
The reactor performance, granules characteristics and microbial population dynamics were investigated to assess the chronic responses of aerobic granules to zinc oxide nanoparticles (ZnO NPs) of 0, 5, 10 and 20mg/L for a period of 180days. The results showed that ZnO NPs stimulated COD removal, whereas caused inhibition to both nitrification and denitrification. However, biological phosphorus removal remained effective and stable. Introduction of ZnO NPs sharply decreased the respiration of granules, while did not change the settleability...
April 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28431359/reconstruction-of-microbial-community-structures-as-evidences-for-soil-redox-coupled-reductive-dechlorination-of-pcp-in-a-mangrove-soil
#6
Yan Xu, Yan He, Xianjin Tang, Philip C Brookes, Jianming Xu
The aim was to investigate the influence of pentachlorophenol (PCP) on the soil microbial communities and the coupled mechanism between PCP reductive dechlorination and soil redox under anaerobic condition. Accordingly, a slurry incubation experiment was carried out in which bacterial and archaeal communities were detected by MiSeq amplicon sequencing. The original microbial community balance was gradually disrupted and new microbial structure was reconstructed subsequently through self-regulation and acclimation during PCP transformation, coupling with the changes of soil biogeochemical redox dynamics...
April 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28431252/engineered-regulatory-systems-modulate-gene-expression-of-human-commensals-in-the-gut
#7
Bentley Lim, Michael Zimmermann, Natasha A Barry, Andrew L Goodman
The gut microbiota is implicated in numerous aspects of health and disease, but dissecting these connections is challenging because genetic tools for gut anaerobes are limited. Inducible promoters are particularly valuable tools because these platforms allow real-time analysis of the contribution of microbiome gene products to community assembly, host physiology, and disease. We developed a panel of tunable expression platforms for the prominent genus Bacteroides in which gene expression is controlled by a synthetic inducer...
April 20, 2017: Cell
https://www.readbyqxmd.com/read/28430298/an-experimental-numerical-investigation-on-the-effects-of-macroporous-scaffold-geometry-on-cell-culture-parameters
#8
Hadis Eghbali, Michele M Nava, Gabriella Leonardi, Davod Mohebbi-Kalhori, Roberto Sebastiano, Abdolreza Samimi, Manuela T Raimondi
INTRODUCTION: Perfused bioreactors have been demonstrated to be effective in the delivery of nutrients and in the removal of waste products to and from the interior of cell-populated three-dimensional scaffolds. In this paper, a perfused bioreactor hosting a macroporous scaffold provided with a channel is used to investigate transport phenomena and culture parameters on cell growth. METHODS: MG63 human osteosarcoma cells were seeded on macroporous poly​(ε-caprolactone) scaffolds provided with a channel...
April 13, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28430188/interactions-between-soil-and-dead-wood-inhabiting-fungal-communities-during-the-decay-of-norway-spruce-logs
#9
Raisa Mäkipää, Tiina Rajala, Dmitry Schigel, Katja T Rinne, Taina Pennanen, Nerea Abrego, Otso Ovaskainen
We investigated the interaction between fungal communities of soil and dead wood substrates. For this, we applied molecular species identification and stable isotope tracking to both soil and decaying wood in an unmanaged boreal Norway spruce-dominated stand. Altogether, we recorded 1990 operational taxonomic units, out of which more than 600 were shared by both substrates and 589 were found to exclusively inhabit wood. On average the soil was more species-rich than the decaying wood, but the species richness in dead wood increased monotonically along the decay gradient, reaching the same species richness and community composition as soil in the late stages...
April 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28429538/finding-a-partner-in-the-ocean-molecular-and-evolutionary-bases-of-the-response-to-sexual-cues-in-a-planktonic-diatom
#10
Swaraj Basu, Shrikant Patil, Daniel Mapleson, Monia Teresa Russo, Laura Vitale, Cristina Fevola, Florian Maumus, Raffaella Casotti, Thomas Mock, Mario Caccamo, Marina Montresor, Remo Sanges, Maria Immacolata Ferrante
Microalgae play a major role as primary producers in aquatic ecosystems. Cell signalling regulates their interactions with the environment and other organisms, yet this process in phytoplankton is poorly defined. Using the marine planktonic diatom Pseudo-nitzschia multistriata, we investigated the cell response to cues released during sexual reproduction, an event that demands strong regulatory mechanisms and impacts on population dynamics. We sequenced the genome of P. multistriata and performed phylogenomic and transcriptomic analyses, which allowed the definition of gene gains and losses, horizontal gene transfers, conservation and evolutionary rate of sex-related genes...
April 21, 2017: New Phytologist
https://www.readbyqxmd.com/read/28428819/lipid-production-and-molecular-dynamics-simulation-for-regulation-of-accd-gene-in-cyanobacteria-under-different-n-and-p-regimes
#11
Roshan Kumar, Koushik Biswas, Puneet Kumar Singh, Pankaj Kumar Singh, Sanniyasi Elumalai, Pratyoosh Shukla, Sunil Pabbi
BACKGROUND: Microalgae grown under different nutrient deficient conditions present a good source of natural lipids with applications for several types of biofuels. The expression of acetyl-CoA carboxylase gene can further provide an insight to the mechanisms leading to enhanced lipid production under such stresses. In this study, two nutrients viz. nitrogen and phosphorus were modulated to see its effect on lipid productivity in selected cyanobacteria and its correlation with Accase followed by molecular dynamics simulation...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28427994/global-dynamics-in-a-stoichiometric-food-chain-model-with-two-limiting-nutrients
#12
Ming Chen, Meng Fan, Yang Kuang
Ecological stoichiometry studies the balance of energy and multiple chemical elements in ecological interactions to establish how the nutrient content affect food-web dynamics and nutrient cycling in ecosystems. In this study, we formulate a food chain with two limiting nutrients in the form of a stoichiometric population model. A comprehensive global analysis of the rich dynamics of the targeted model is explored both analytically and numerically. Chaotic dynamic is observed in this simple stoichiometric food chain model and is compared with traditional model without stoichiometry...
April 18, 2017: Mathematical Biosciences
https://www.readbyqxmd.com/read/28427560/stress-adaptive-response-in-ovarian-cancer-drug-resistance-role-of-trap1-in-oxidative-metabolism-driven-inflammation
#13
Maria Rosaria Amoroso, Danilo Swann Matassa, Ilenia Agliarulo, Rosario Avolio, Francesca Maddalena, Valentina Condelli, Matteo Landriscina, Franca Esposito
Metabolic reprogramming is one of the most frequent stress-adaptive response of cancer cells to survive environmental changes and meet increasing nutrient requirements during their growth. These modifications involve cellular bioenergetics and cross talk with surrounding microenvironment, in a dynamic network that connect different molecular processes, such as energy production, inflammatory response, and drug resistance. Even though the Warburg effect has long been considered the main metabolic feature of cancer cells, recent reports identify mitochondrial oxidative metabolism as a driving force for tumor growth in an increasing number of cellular contexts...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28426987/a-review-on-nitrous-oxide-n2o-emissions-during-biological-nutrient-removal-from-municipal-wastewater-and-sludge-reject-water
#14
REVIEW
Theoni Maria Massara, Simos Malamis, Albert Guisasola, Juan Antonio Baeza, Constantinos Noutsopoulos, Evina Katsou
Nitrous oxide (N2O) is an important pollutant which is emitted during the biological nutrient removal (BNR) processes of wastewater treatment. Since it has a greenhouse effect which is 265 times higher than carbon dioxide, even relatively small amounts can result in a significant carbon footprint. Biological nitrogen (N) removal conventionally occurs with nitrification/denitrification, yet also through advanced processes such as nitritation/denitritation and completely autotrophic N-removal. The microbial pathways leading to the N2O emission include hydroxylamine oxidation and nitrifier denitrification, both activated by ammonia oxidizing bacteria, and heterotrophic denitrification...
April 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28425584/changes-in-ciap2-survivin-and-bimel-expression-characterize-the-switch-from-autophagy-to-apoptosis-in-prolonged-starvation
#15
A Hay-Koren, S Bialik, V Levin-Salomon, A Kimchi
BACKGROUND: Autophagy is a catabolic process involving the engulfment of cytoplasmic content within autophagosomes followed by their delivery to lysosomes. This process is a survival mechanism, enabling cells to cope with nutrient deprivation by degradation and recycling of macromolecules. Yet during continued stress such as prolonged starvation, a switch from autophagy to apoptosis is often detected. OBJECTIVE: In this work, we characterized the temporal dynamics of the transition from autophagy towards apoptosis with the aim of elucidating the molecular mechanism regulating the switch from survival autophagy to apoptotic cell death...
May 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28423062/filamentous-fungal-carbon-catabolite-repression-supports-metabolic-plasticity-and-stress-responses-essential-for-disease-progression
#16
Sarah R Beattie, Kenneth M K Mark, Arsa Thammahong, Laure Nicolas Annick Ries, Sourabh Dhingra, Alayna K Caffrey-Carr, Chao Cheng, Candice C Black, Paul Bowyer, Michael J Bromley, Joshua J Obar, Gustavo H Goldman, Robert A Cramer
Aspergillus fumigatus is responsible for a disproportionate number of invasive mycosis cases relative to other common filamentous fungi. While many fungal factors critical for infection establishment are known, genes essential for disease persistence and progression are ill defined. We propose that fungal factors that promote navigation of the rapidly changing nutrient and structural landscape characteristic of disease progression represent untapped clinically relevant therapeutic targets. To this end, we find that A...
April 19, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28419433/plant-soil-feedbacks-in-declining-forests-implications-for-species-coexistence
#17
Lorena Gómez-Aparicio, Jara Domínguez-Begines, Paul Kardol, José M Ávila, Beatriz Ibáñez, Luis V García
Plant-soil feedbacks (PSFs) play a relevant role as drivers of species abundance, coexistence, and succession in plant communities. However, the potential contribution of PSFs to community dynamics in changing forest ecosystems affected by global change drivers is still largely unexplored. We measured the direction, strength and nature (biological vs. chemical) of PSFs experienced by coexisting tree species in two types of declining Quercus suber forests of southwestern Spain (open woodland vs. closed forest) invaded by the exotic soil pathogen Phytophthora cinnamomi...
April 18, 2017: Ecology
https://www.readbyqxmd.com/read/28413863/metabolism-and-homeostasis-in-the-kidney-metabolic-regulation-through-insulin-signaling-in-the-kidney
#18
REVIEW
Alexander Kuczkowski, Paul T Brinkkoetter
Metabolic signaling pathways orchestrate the dynamic turnover between catabolic and anabolic processes. Thereby, they ensure the viability of the cell and assure proper function of the tissue in changing environments regarding the availability of nutrients. Yet, renal cells are not considered to be prime targets of metabolic signaling. Research of the last decade has proposed new roles of specifically altered metabolic signaling pathways. In particular, the insulin signaling cascade, a potent regulator of cellular metabolism and energy homeostasis, seems to be implicated in the progression of diabetic and non-diabetic kidney disease...
April 17, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28413444/functional-photosystem-i-maintains-proper-energy-balance-during-nitrogen-depletion-in-chlamydomonas-reinhardtii-promoting-triacylglycerol-accumulation
#19
Mahmoud Gargouri, Philip D Bates, Jeong-Jin Park, Helmut Kirchhoff, David R Gang
BACKGROUND: Nutrient deprivation causes significant stress to the unicellular microalga, Chlamydomonas reinhardtii, which responds by significantly altering its metabolic program. Following N deprivation, the accumulation of starch and triacylglycerols (TAGs) is significantly altered following massive reprogramming of cellular metabolism. One protein that was found to change dramatically and early to this stress was TAB2, a photosystem I (PSI) translation initiation factor, whose transcript and protein levels increased significantly after only 30 min of N deprivation...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28412057/chemical-characterization-of-biochar-and-assessment-of-the-nutrient-dynamics-by-means-of-preliminary-plant-growth-tests
#20
Munoo Prasad, Nikos Tzortzakis, Nicola McDaniel
Biochar can be produced from several organic sources with varying nutrients and metal concentrations. Four commercial grade biochars were evaluated as peat substitute. Biochars were characterised for plant nutrients and for biological stability. The results showed that there were negligible quantities of N and P and generally high levels of K and high biological stability. When these materials were mixed with peat at 10, 25 and 50% and nutrients were added to bring them to the same level of nutrients as in fertilized peat, it was found that biochar mixtures considerably reduced the levels of calcium chloride/DTPA (CAT) extractable N (including nitrate), P, and electrical conductivity- greater extent with higher rates of biochar addition except for K...
April 12, 2017: Journal of Environmental Management
keyword
keyword
117742
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"