Cadmium content of the marine sponge Microciona prolifera, other sponges, water and sediment from the eastern Florida panhandle: possible effects on Microciona cell aggregation and potential roles of low pH and low salinity

1999 ◽  
Vol 124 (1) ◽  
pp. 41-49 ◽  
Author(s):  
R.B Philp
Keyword(s):  
Marine Sponge ◽  
Cell Aggregation ◽  
Low Ph ◽  
Cadmium Content ◽  
Low Salinity ◽  
Water And Sediment ◽  
Florida Panhandle

scholarly journals Characterization of a novel pyruvylated carbohydrate unit implicated in the cell aggregation of the marine sponge Microciona prolifera

1993 ◽  
Vol 268 (18) ◽  
pp. 13378-13387
Author(s):  
D. Spillmann ◽  
K. Hård ◽  
J. Thomas-Oates ◽  
J.F. Vliegenthart ◽  
G. Misevic ◽  
...  
Keyword(s):  
Marine Sponge ◽  
Cell Aggregation ◽  
Carbohydrate Unit

Transcriptional profiling reveals molecular basis and the role of arginine in response to low-pH stress in Pichia kudriavzevii

2019 ◽  
Author(s):  
Hao Ji ◽  
Xiameng Dong ◽  
Kailun Zhang ◽  
Libo Jin ◽  
Renyi Peng ◽  
...  
Keyword(s):  
Organic Acids ◽  
Molecular Basis ◽  
Transcriptional Profiling ◽  
Cell Aggregation ◽  
Membrane Lipid ◽  
Low Ph ◽  
Pichia Kudriavzevii ◽  
Ph Stress ◽  
Ph Conditions

Abstract BackgroundThe non-conventional yeast Pichia kudriavzevii possesses a unique ability to tolerate various environmental stresses particularly low-pH stress. Thus, it is considered to be a promising biotechnological host for the production of various organic acids under low-pH conditions. However, little is known about the low-pH stress response in P. kudriavzevii, which significantly restricts its future development. ResultsIn this study, P. kudriavzevii JLY1107 showed great tolerance to low-pH stress, but its cell aggregation upon acidic conditions is unfavorable for the development of low-pH fermentation. To explore the molecular basis, we conducted RNA-Seq to compare global gene expression in response to low-pH. Among the 429 differentially expressed genes, the genes associated with regulation of membrane lipid composition, filamentous growth and arginine metabolism were selected for in-depth discussions. The up-regulation of genes associated with arginine uptake and degradation suggests a potential role of arginine in response to low-pH strsss. We therefore present data supporting the hypothesis that P. kudriavzevii maintains intracellular homeostasis by using the ammonia produced by arginine catabolism. Furthermore, external addition of arginine significantly enhances growth and reduces cell aggregation of P. kudriavzevii under low-pH conditions.ConclusionsArginine was demonstrated to be a promising molecule for improving cell growth and preventing cell aggregation under extremely low-pH conditions. Our study is a step towards developing the non-conventional yeast P. kudriavzevii as a platform host for the production of organic acids under low-pH conditions.

scholarly journals Low pH Enhances the Glucosinolate-Mediated Yellowing of Takuan-zuke under Low Salt Conditions

Foods ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1524
Author(s):  
Taito Kobayashi ◽  
Kei Kumakura ◽  
Asaka Takahashi ◽  
Hiroki Matsuoka
Keyword(s):  
Low Temperature ◽  
High Performance ◽  
Ph Control ◽  
Low Ph ◽  
Short Term ◽  
Low Salinity ◽  
Radish Root ◽  
Low Salt ◽  
Related Compounds ◽  
Citrate Phosphate

This study was performed to clarify the enhancement of the 4-methylthio-3-butenyl isothiocyanate induced yellowing of salted radish root (takuan-zuke) by low pH during short-term salt-aging at low temperature and low salinity. We used two different methods to prepare the dehydrated daikon prior to salt-aging: air-drying outdoors (hoshi takuan-zuke) or salting with a stone press (shio-oshi takuan-zuke). Low salt-aging at low temperature was carried out under pH control with citrate-phosphate buffer. The yellowing of both types of takuan-zuke was accelerated below pH 5, and the color of air-dried takuan-zuke was deeper than that of salt-pressed takuan-zuke. To elucidate this phenomenon, several previously reported yellowing-related compounds were analyzed by high-performance liquid chromatography. The result showed that the production of the primary pigment, 2-[3-(2-thioxopyrrolidin-3-ylidene)methyl]-tryptophan, was low compared with that in previous reports. Therefore, we suggest that an unknown pigment was generated through a previously unreported pathway.

Recent benthic foraminiferal distribution and related environmental factors in Ezcurra Inlet, King George Island, Antarctica

2010 ◽  
Vol 22 (4) ◽  
pp. 343-360 ◽  
Author(s):  
André Rosch Rodrigues ◽  
João Carlos Cattini Maluf ◽  
Elisabete de Santis Braga ◽  
Beatriz Beck Eichler
Keyword(s):  
Environmental Parameters ◽  
Shallow Waters ◽  
King George Island ◽  
Muddy Sand ◽  
Sediment Control ◽  
Low Salinity ◽  
Ph Values ◽  
Water And Sediment ◽  
Representative Species ◽  
Using Data

AbstractThis investigation attempts to determine which environmental parameters of the bottom water and sediment control recent foraminifera fauna at Ezcurra Inlet (King George Island, Antarctica), using data collected during four summers (2002/03, 2003/04, 2004/05 and 2006/07). The study revealed that Ezcurra Inlet contain typical Antarctic foraminifera fauna with three distinct assemblages and few differences in environmental parameters. The species Bolivina pseudopunctata, Fursenkoina fusiformis, Portatrochammina antarctica, and Adercotryma glomerata were abundant in the samples. An elevated abundance, richness and diversity were common at the entrance of the inlet at depths greater than 55 m, where the inlet was characterized by low temperatures and muddy sand. In the inner part of the inlet (depth 30–55 m), richness and diversity were low and the most significant species were Cassidulinoides parkerianus, C. porrectus, and Psammosphaera fusca. Shallow waters showed low values of richness and abundance and high temperatures coupled with coarser sediment. In areas with high suspended matter concentrations and pH values associated with low salinity the most representative species were Hippocrepinella hirudinea and Hemisphaerammina bradyi.

scholarly journals Gopher Apple, Geobalanus oblongifolius Synonym: Licania michauxii

EDIS ◽  
2018 ◽  
Vol 2018 (5) ◽  
Author(s):  
Debbie Miller ◽  
Mack Thetford ◽  
Chris Verlinde ◽  
Gabriel Campbell ◽  
Ashlynn Smith
Keyword(s):  
South Carolina ◽  
Small Mammals ◽  
Native Plants ◽  
Coastal Dunes ◽  
Low Ph ◽  
Coastal Landscape ◽  
Fact Sheet ◽  
Dune Restoration ◽  
Disturbed Areas ◽  
Florida Panhandle

Gopher apple occurs from the lower Florida peninsula northward to South Carolina westward to Louisiana in coastal dunes, sandhills, and disturbed areas such as roadsides. Gopher apple gets its name because gopher tortoises, along with other small mammals, eat their fruit. Gopher apple is an ideal groundcover for a coastal landscape with well-draining soil and a low pH (Gilman 2014).https://edis.ifas.ufl.edu/sg169 Note: This fact sheet is also available as a chapter in a comprehensive manual titled Dune Restoration and Enhancement for the Florida Panhandle,  Please see the manual for more information about other useful and attractive native plants for dunes and for further information about restoration and preservation techniques

scholarly journals Effects of Low pH and Low Salinity Induced by Meltwater Inflow on the Behavior and Physical Condition of the Antarctic Limpet, Nacella concinna

2020 ◽  
Vol 8 (10) ◽  
pp. 822
Author(s):  
Eunchong Sin ◽  
In-Young Ahn ◽  
Seojeong Park ◽  
Taewon Kim
Keyword(s):  
Condition Factor ◽  
Low Ph ◽  
Short Term ◽  
Saturation State ◽  
Glacial Retreat ◽  
Seawater Acidification ◽  
Low Salinity ◽  
Significant Difference ◽  
And Behavior ◽  
The Antarctic

Seawater acidification and freshening in the intertidal zone of Marian Cove, Antarctica, which occurs by the freshwater inflow from snow fields and glaciers, could affect the physiology and behavior of intertidal marine organisms. In this study, we exposed Antarctic limpets, Nacella concinna, to two different pH (8.00 and 7.55) and salinity (34.0 and 27.0 psu) levels and measured their righting ability after being flipped over, mortality, condition factor, and shell dissolution. During the 35-day exposure, there was no significant difference in behavior and mortality between different treatments. However, the condition factor was negatively affected by low salinity. Both low pH and low salinity negatively influenced shell formation by decreasing the aragonite saturation state (Ωarg) and enhancing shell dissolution. Our results suggest that, though limpets can tolerate short-term low pH and salinity conditions, intrusions of meltwater accompanied by the glacial retreat may act as a serious threat to the population of N. concinna.

Characterization of Low Salinity Stress in Vibrio parahaemolyticus

2012 ◽  
Vol 75 (2) ◽  
pp. 231-237 ◽  
Author(s):  
WEI SHEN HUANG ◽  
HIN-CHUNG WONG
Keyword(s):  
Acetic Acid ◽  
Lactic Acid ◽  
Stationary Phase ◽  
Salinity Stress ◽  
Vibrio Parahaemolyticus ◽  
Acid Stress ◽  
Low Ph ◽  
Exponential Phase ◽  
Low Salinity ◽  
Acetic Acid Treatment

Vibrio parahaemolyticus is a marine foodborne pathogenic bacterium commonly found in seawater or seafood. This bacterium often encounters low salinity stress when the contaminated seafood is washed with fresh water during food processing. This study was conducted to investigate the response of exponential- and stationary-phase cells of V. parahaemolyticus ST550 to lethal or sublethal low salinity. Tolerance to lethal low salinity (0.25% NaCl) was enhanced in V. parahaemolyticus cells in the exponential phase by previous adaptation in sublethal low salinity (0.6% NaCl). Low salinity–adapted cells in the exponential phase were also cross-protected against the challenge of lethal low pH, indifferent to heat, and sensitized to bile, acetic acid, and lactic acid stress. The adapted cells in the stationary phase were significantly protected against heat treatment at 44°C for 10 and 15 min, sensitized to bile and acetic acid treatment, and indifferent to low pH and lactic acid.

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