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Cross Talk between Hydrogen Peroxide and Nitric Oxide in the Unicellular Green Algae Cell Cycle: How Does It Work?

Journal

CELLS
Volume 11, Issue 15, Pages -

Publisher

MDPI
DOI: 10.3390/cells11152425

Keywords

hydrogen peroxide; nitric oxide; algae; cell cycle; Chlamydomonas

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Funding

  1. National Science Centre Poland [UMO2019/35/B/NZ9/01567]

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Reactive oxygen species (ROS) and reactive nitrogen species (RNS) play regulatory roles in the development of higher plants, algae, and animals. In green cells, the redox potential regulates growth rate. Hydrogen peroxide and nitric oxide directly participate in algal cell development by regulating the expression of proteins involved in the cell cycle. This regulation involves the interaction of these signaling molecules with redox-sensitive transcription factors and signaling pathways. This paper aims to elucidate the involvement of hydrogen peroxide and nitric oxide in algal cell cycle regulation and evaluate their commercial applicability.
The regulatory role of some reactive oxygen species (ROS) and reactive nitrogen species (RNS), such as hydrogen peroxide or nitric oxide, has been demonstrated in some higher plants and algae. Their involvement in regulation of the organism, tissue and single cell development can also be seen in many animals. In green cells, the redox potential is an important photosynthesis regulatory factor that may lead to an increase or decrease in growth rate. ROS and RNS are important signals involved in the regulation of photoautotrophic growth that, in turn, allow the cell to attain the commitment competence. Both hydrogen peroxide and nitric oxide are directly involved in algal cell development as the signals that regulate expression of proteins required for completing the cell cycle, such as cyclins and cyclin-dependent kinases, or histone proteins and E2F complex proteins. Such regulation seems to relate to the direct interaction of these signaling molecules with the redox-sensitive transcription factors, but also with regulation of signaling pathways including MAPK, G-protein and calmodulin-dependent pathways. In this paper, we aim to elucidate the involvement of hydrogen peroxide and nitric oxide in algal cell cycle regulation, considering the role of these molecules in higher plants. We also evaluate the commercial applicability of this knowledge. The creation of a simple tool, such as a precisely established modification of hydrogen peroxide and/or nitric oxide at the cellular level, leading to changes in the ROS-RNS cross-talk network, can be used for the optimization of the efficiency of algal cell growth and may be especially important in the context of increasing the role of algal biomass in science and industry. It could be a part of an important scientific challenge that biotechnology is currently focused on.

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