Response of pomegranate arils (cv. Wonderful) to low oxygen stress under active modified atmosphere condition

2018 ◽  
Vol 99 (3) ◽  
pp. 1088-1097 ◽  
Author(s):  
Zinash A Belay ◽  
Oluwafemi J Caleb ◽  
Pramod V Mahajan ◽  
Umezuruike L Opara
Keyword(s):  
Modified Atmosphere ◽  
Low Oxygen ◽  
Oxygen Stress ◽  
Pomegranate Arils

Dynamic changes of antioxidants and fermentative metabolites in apple peel in relation to storage, controlled atmosphere, and initial low oxygen stress

2021 ◽  
Vol 288 ◽  
pp. 110312
Author(s):  
Marina Buccheri ◽  
Valentina Picchi ◽  
Maurizio Grassi ◽  
Davide Gandin ◽  
Giulia Bianchi ◽  
...  
Keyword(s):  
Controlled Atmosphere ◽  
Low Oxygen ◽  
Dynamic Changes ◽  
Oxygen Stress ◽  
Apple Peel

Design of Active Modified Atmosphere and Humidity Packaging (MAHP) for ‘Wonderful’ Pomegranate Arils

2018 ◽  
Vol 11 (8) ◽  
pp. 1478-1494 ◽  
Author(s):  
Zinash A. Belay ◽  
Oluwafemi J. Caleb ◽  
Pramod V. Mahajan ◽  
Umezuruike Linus Opara
Keyword(s):  
Modified Atmosphere ◽  
Pomegranate Arils

Pyrophosphate as an alternative energy currency in plants

2021 ◽  
Vol 478 (8) ◽  
pp. 1515-1524
Author(s):  
Abir U. Igamberdiev ◽  
Leszek A. Kleczkowski
Keyword(s):  
Metabolic Pathways ◽  
Energy Efficient ◽  
Alternative Energy ◽  
Plant Cells ◽  
Atp Synthesis ◽  
Continuous Operation ◽  
Low Oxygen ◽  
Pyruvate Phosphate Dikinase ◽  
Oxygen Stress ◽  
Membrane Bound

In the conditions of [Mg2+] elevation that occur, in particular, under low oxygen stress and are the consequence of the decrease in [ATP] and increase in [ADP] and [AMP], pyrophosphate (PPi) can function as an alternative energy currency in plant cells. In addition to its production by various metabolic pathways, PPi can be synthesized in the combined reactions of pyruvate, phosphate dikinase (PPDK) and pyruvate kinase (PK) by so-called PK/PPDK substrate cycle, and in the reverse reaction of membrane-bound H+-pyrophosphatase, which uses the energy of electrochemical gradients generated on tonoplast and plasma membrane. The PPi can then be consumed in its active forms of MgPPi and Mg2PPi by PPi-utilizing enzymes, which require an elevated [Mg2+]. This ensures a continuous operation of glycolysis in the conditions of suppressed ATP synthesis, keeping metabolism energy efficient and less dependent on ATP.

Metabolic profiling reveals a coordinated response of isolated lamb's ( Valerianella locusta , L.) lettuce cells to sugar starvation and low oxygen stress

2017 ◽  
Vol 126 ◽  
pp. 23-33 ◽  
Author(s):  
Baiye Mfortaw Mbong Victor ◽  
Jerry Ampofo-Asiama ◽  
Maarten Hertog ◽  
Annemie H. Geeraerd ◽  
Bart M. Nicolai
Keyword(s):  
Metabolic Profiling ◽  
Low Oxygen ◽  
Oxygen Stress ◽  
Sugar Starvation

Oxidative stress-related responses of Bifidobacterium longum subsp. longum BBMN68 at the proteomic level after exposure to oxygen

Microbiology ◽  
2011 ◽  
Vol 157 (6) ◽  
pp. 1573-1588 ◽  
Author(s):  
Man Xiao ◽  
Pan Xu ◽  
Jianyun Zhao ◽  
Zeng Wang ◽  
Fanglei Zuo ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oxidative Damage ◽  
Bifidobacterium Longum ◽  
Transcriptional Level ◽  
Low Oxygen ◽  
Oxygen Stress ◽  
Dna Oxidative Damage ◽  
Proteomic Approach ◽  
Protective Proteins

Bifidobacterium longum subsp. longum BBMN68, an anaerobic probiotic isolated from healthy centenarian faeces, shows low oxygen (3 %, v/v) tolerance. To understand the effects of oxidative stress and the mechanisms protecting against it in this strain, a proteomic approach was taken to analyse changes in the cellular protein profiles of BBMN68 under the following oxygen-stress conditions. Mid-exponential phase BBMN68 cells grown in MRS broth at 37 °C were exposed to 3 % O2 for 1 h (I) or 9 h (II), and stationary phase cells were subjected to 3 % O2 for 1 h (III). Respective controls were grown under identical conditions but were not exposed to O2. A total of 51 spots with significant changes after exposure to oxygen were identified, including the oxidative stress-protective proteins alkyl hydroperoxide reductase C22 (AhpC) and pyridine nucleotide-disulfide reductase (PNDR), and the DNA oxidative damage-protective proteins DNA-binding ferritin-like protein (Dps), ribonucleotide reductase (NrdA) and nucleotide triphosphate (NTP) pyrophosphohydrolases (MutT1). Changes in polynucleotide phosphorylase (PNPase) plus enolase, which may play important roles in scavenging oxidatively damaged RNA, were also found. Following validation at the transcriptional level of differentially expressed proteins, the physiological and biochemical functions of BBMN68 Dps were further proven by in vitro and in vivo tests under oxidative stress. Our results reveal the key oxidative stress-protective proteins and DNA oxidative damage-protective proteins involved in the defence strategy of BBMN68 against oxygen, and provide the first proteomic information toward understanding the responses of Bifidobacterium and other anaerobes to oxygen stress.

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