Effect of different stress conditions on trehalose accumulation and degradation in Rhizopus oryzae.

Özer, Gülsüm Ebru


Effect of different stresses on trehalose levels in Rhizopus oryzae
Uyar, Ebru Ozer; Hamamcı, Haluk; TÜRKEL, SEZAİ (2010-08-01)
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....
Effect of plasmid backbone modification by different human CpG motifs on the immunogenicity of DNA vaccine vectors.
Coban, C; Ishii, KJ; Gürsel, Mayda; Klinman, DM; Kumar, N (Wiley, 2005-09-01)
DNA vaccines, in general, have been found to be poorly immunogenic in nonhuman primates and humans as compared with mice. As the immunogenicity of DNA plasmids relies, to a large extent, on the presence of CpG motifs as built in adjuvants, we addressed the issue of poor immunogenicity by inserting recently identified CpG oligonucleotides (ODN) optimal for human (K-type or D-type CpG ODN) into the backbone of plasmid VR1020. We found that plasmid DNA containing K-type CpG motifs or D-type CpG motifs signific...
Effect of boron and iron stress on phytosiderophore production in barley
İnce, Yetkin Çaka; Yücel, Ayşe Meral; Department of Biology (2015)
Boron and iron are essential nutrients for growth and development of higher plants. Deficiency and toxicity of them cause significant changes in physiological, cellular and molecular make-up of plants. Iron uptake in barley is mainly achieved by production and release of phytosiderophores to the environment. On the other hand, production of phytosiderophores are affected by concentrations of boron and iron. Four enzymes which function in phytosiderophore hydroxymugineic acid (HMA) production namely NAS, NAA...
Effect of water deficit conditions on superoxide dismutase isoenzyme activities in wheat
Inci, F; Öktem, Hüseyin Avni; Yucel, M (1998-01-01)
Superoxide dismutase (SOD, E.C. converts superoxide to hydrogen peroxide, therefore important in prevention of oxygen toxicity produced by several environmental stresses. In the present work, the effect of water deficit on the activity of SOD isoenzymes in roots and shoots of 10 day-old seedlings of seven wheat cultivars was studied. Bread wheat varieties showed different responses, while a general decrease in the SOD isoenzyme activity was observed in a durum variety. The obtained data suggest tha...
Effect of auxin-like plant growth regulators on salt stressed wheat varieties.
Mavituna, A. Meltem; Yücel, Meral; Öktem, Hüseyin Avni; Department of Biology (1996)
Citation Formats
G. E. Özer, “Effect of different stress conditions on trehalose accumulation and degradation in Rhizopus oryzae.,” Middle East Technical University, 2002.