Effect of different stresses on trehalose levels in Rhizopus oryzae

Date

2010-08-01

Author

Uyar, Ebru Ozer
Hamamcı, Haluk
TÜRKEL, SEZAİ

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

174
views

0
downloads

Rhizopus oryzae accumulates and degrades trehalose in response to environmental stress conditions such as heat, osmotic stress, nitrogen starvation and pH. When heat stress was applied to R. oryzae, the trehalose content of the cells was increased from 0.9 to 4.8 mg/g dw and when the stress was relieved it decreased back to 1.1 mg/g dw. Under osmotic stress and nitrogen starvation, trehalose content was increased by 3.5 and 3 fold, respectively. The decrease in external pH increased trehalose level up to 2.6 mg/g dw from 1.1 mg/g dw. Increased trehalose level decreased back to normal after pH stress was relieved. These results indicate that trehalose accumulates and acts as a stress protectant in R. oryzae.

Subject Keywords

Rhizopus oryzae, Trehalose, Stress response, Filamentous fungi

URI

https://hdl.handle.net/11511/30140

Journal

JOURNAL OF BASIC MICROBIOLOGY

DOI

https://doi.org/10.1002/jobm.200900339

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Effects of water temperature on summer periphyton biomass in shallow lakes: a pan-European mesocosm experiment Mahdy, Aldoushy; Hilt, Sabine; Filiz, Nur; Beklioğlu, Meryem; Hejzlar, Josef; Ozkundakci, Deniz; Papastergiadou, Eva; Scharfenberger, Ulrike; Sorf, Michal; Stefanidis, Kostas; Tuvikene, Lea; Zingel, Priit; Sondergaard, Martin; Jeppesen, Erik; Adrian, Rita (2015-07-01) Periphyton communities play an important role in shallow lakes and are controlled by direct forces such as temperature, light, nutrients, and invertebrate grazing, but also indirectly by planktivorous fish predation. We performed a pan-European lake mesocosm experiment on periphyton colonization covering five countries along a north/south geographical/temperature gradient (Estonia, Germany, Czech Republic, Turkey, and Greece). Periphyton biomass on artificial polypropylene strips exposed at 50 cm water dept...
Effect of salinity on antioxidant responses of chickpea seedlings Eyidogan, Fuesun; Oez, Mehmet Tufan (2007-10-01) The changes in the activity of antioxidant enzymes, like superoxide dismutase, ascorbate peroxidase, catalase and glutathione reductase, and growth parameters such as length, fresh and dry weight, proline and H2O2 contents, chlorophyll fluorescence (Fv/Fm), quantum yield of PSII and the rate of lipid peroxidation in terms of malondialdehyde in leaf and root tissues of a chickpea cultivar (Cicer arietinum L. cv. Gokc,e)under salt treatment were investigated. Plants were subjected to 0.1, 0.2 and 0.5 M NaCl t...
Effect of cold stress on barley (hordeum vulgare L.) superoxide dismutase isozyme activities and expression levels of cu/znsod gene Kayıhan, Ceyhun; Yücel, Ayşe Meral; Department of Biotechnology (2007) In this study, effect of cold stress and recovery on the superoxide dismutase (SOD) activities and the expression levels of Cu/ZnSOD gene were investigated in two barley cultivars (Tarm-92-winter type, Zafer-160-spring type). Eight days old barley seedlings were subjected to two different cold stresses; chilling stress at 4°C for 1, 3, 7 days and freezing stress at -3°C and -7°C. Analyses were performed both on leaf and root tissues. The SOD activities and isozyme patterns were determined by Native PAGE act...
Effects of pH and feeding strategy on metabolite profiling of beta-lactamase producing bacillus licheniformis İler, Nazar; Çalık, Pınar; Department of Chemical Engineering (2005) In this study, the effects of pH and different feeding modes on beta-lactamase production and cell metabolism were investigated with Bacillus licheniformis (ATCC 25972). For this purpose, first, the effects of pH on beta-lactamase activity, cell formation, substrate consumption, as well as intracellular sodium, potassium, ammonium ion, amino acid and organic acid concentrations were investigated in V= 3.0 dm3 batch bioreactors consisting of temperature, pH, foam, stirring rate and dissolved oxygen controls....
Effects of operational parameters on the settling properties of activated sludge Sürücü, Gülerman; Soyupak, Salçuk (Informa UK Limited, 1989-5) Settling properties of activated sludge typically establish the performance and the cost of biological wastewater treatment plants, and they are considerably affected by the solids concentration of the sludge and the mean cell residence time of the system. In this work, effects of mean cell residence time of the system and solids concentration of sludge on the settling properties of activated sludge were studied. By statistical analysis of the laboratory data, mathematical expressions were suggested to e...

Citation Formats

E. O. Uyar, H. Hamamcı, and S. TÜRKEL, “Effect of different stresses on trehalose levels in Rhizopus oryzae,” JOURNAL OF BASIC MICROBIOLOGY, pp. 368–372, 2010, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30140.