Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants
Low temperature stress has a severe impact on the distribution, physiology, and survival of plants in their natural habitats. While numerous studies have focused on the physiological and molecular adjustments to low temperatures, this study provides evidence that cold induced physiological responses...
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ftpubmed:oai:pubmedcentral.nih.gov:7699614 2023-05-15T18:04:31+02:00 Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants Steiner, Philip Buchner, Othmar Andosch, Ancuela Wanner, Gerhard Neuner, Gilbert Lütz-Meindl, Ursula 2020-11-19 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7699614/ http://www.ncbi.nlm.nih.gov/pubmed/33228190 https://doi.org/10.3390/ijms21228753 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7699614/ http://www.ncbi.nlm.nih.gov/pubmed/33228190 http://dx.doi.org/10.3390/ijms21228753 © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Int J Mol Sci Article Text 2020 ftpubmed https://doi.org/10.3390/ijms21228753 2020-12-06T02:01:31Z Low temperature stress has a severe impact on the distribution, physiology, and survival of plants in their natural habitats. While numerous studies have focused on the physiological and molecular adjustments to low temperatures, this study provides evidence that cold induced physiological responses coincide with distinct ultrastructural alterations. Three plants from different evolutionary levels and habitats were investigated: The freshwater alga Micrasterias denticulata, the aquatic plant Lemna sp., and the nival plant Ranunculus glacialis. Ultrastructural alterations during low temperature stress were determined by the employment of 2-D transmission electron microscopy and 3-D reconstructions from focused ion beam–scanning electron microscopic series. With decreasing temperatures, increasing numbers of organelle contacts and particularly the fusion of mitochondria to 3-dimensional networks were observed. We assume that the increase or at least maintenance of respiration during low temperature stress is likely to be based on these mitochondrial interconnections. Moreover, it is shown that autophagy and degeneration processes accompany freezing stress in Lemna and R. glacialis. This might be an essential mechanism to recycle damaged cytoplasmic constituents to maintain the cellular metabolism during freezing stress. Text Ranunculus glacialis PubMed Central (PMC) International Journal of Molecular Sciences 21 22 8753 |
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Article Steiner, Philip Buchner, Othmar Andosch, Ancuela Wanner, Gerhard Neuner, Gilbert Lütz-Meindl, Ursula Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants |
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Low temperature stress has a severe impact on the distribution, physiology, and survival of plants in their natural habitats. While numerous studies have focused on the physiological and molecular adjustments to low temperatures, this study provides evidence that cold induced physiological responses coincide with distinct ultrastructural alterations. Three plants from different evolutionary levels and habitats were investigated: The freshwater alga Micrasterias denticulata, the aquatic plant Lemna sp., and the nival plant Ranunculus glacialis. Ultrastructural alterations during low temperature stress were determined by the employment of 2-D transmission electron microscopy and 3-D reconstructions from focused ion beam–scanning electron microscopic series. With decreasing temperatures, increasing numbers of organelle contacts and particularly the fusion of mitochondria to 3-dimensional networks were observed. We assume that the increase or at least maintenance of respiration during low temperature stress is likely to be based on these mitochondrial interconnections. Moreover, it is shown that autophagy and degeneration processes accompany freezing stress in Lemna and R. glacialis. This might be an essential mechanism to recycle damaged cytoplasmic constituents to maintain the cellular metabolism during freezing stress. |
format |
Text |
author |
Steiner, Philip Buchner, Othmar Andosch, Ancuela Wanner, Gerhard Neuner, Gilbert Lütz-Meindl, Ursula |
author_facet |
Steiner, Philip Buchner, Othmar Andosch, Ancuela Wanner, Gerhard Neuner, Gilbert Lütz-Meindl, Ursula |
author_sort |
Steiner, Philip |
title |
Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants |
title_short |
Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants |
title_full |
Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants |
title_fullStr |
Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants |
title_full_unstemmed |
Fusion of Mitochondria to 3-D Networks, Autophagy and Increased Organelle Contacts are Important Subcellular Hallmarks during Cold Stress in Plants |
title_sort |
fusion of mitochondria to 3-d networks, autophagy and increased organelle contacts are important subcellular hallmarks during cold stress in plants |
publisher |
MDPI |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7699614/ http://www.ncbi.nlm.nih.gov/pubmed/33228190 https://doi.org/10.3390/ijms21228753 |
genre |
Ranunculus glacialis |
genre_facet |
Ranunculus glacialis |
op_source |
Int J Mol Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7699614/ http://www.ncbi.nlm.nih.gov/pubmed/33228190 http://dx.doi.org/10.3390/ijms21228753 |
op_rights |
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/ijms21228753 |
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International Journal of Molecular Sciences |
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21 |
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22 |
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8753 |
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1766175915933433856 |