Structural and functional features of mitochondria in statocytes of soybean root under microgravity conditions

Климчук, Дмитро Олександрович

doi:10.3103/s0095452707010057

Cited by 4 publications

(4 citation statements)

References 19 publications

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“…Another study reported decreased mitochondrial activity in the roots of space-flown soybean seedlings (Klimchuk, 2007). Low doses of radiation trigger severe mitochondrial damage (Shimura et al, 2016), and the lower diffusion rates of solutes in microgravity (Smith et al, 2009) reduce the hydrogen gradient at the mitochondrial intermembrane space, reducing electron transport chain and ATP synthesis (Nelson, 2013).…”

Section: Discussionmentioning

confidence: 99%

Comprehensive Multi-omics Analysis Reveals Mitochondrial Stress as a Central Biological Hub for Spaceflight Impact

Silveira

Fazelinia

Rosenthal

et al. 2020

Cell

244

191

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Section: Discussionmentioning

confidence: 99%

Comprehensive Multi-omics Analysis Reveals Mitochondrial Stress as a Central Biological Hub for Spaceflight Impact

Silveira

Fazelinia

Rosenthal

et al. 2020

Cell

244

191

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“…Oxidative stress can also manifest as alterations in organellar morphology and increased mitochondria, chloroplasts, vacuoles, and amyloplasts 71 , 72 . We measured the abundance of mtDNA and cpDNA in space-flown plants as a proxy for organellar function.…”

Section: Resultsmentioning

confidence: 99%

Arabidopsis telomerase takes off by uncoupling enzyme activity from telomere length maintenance in space

Barcenilla,

Meyers,

Castillo-González

et al. 2023

Nat Commun

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Spaceflight-induced changes in astronaut telomeres have garnered significant attention in recent years. While plants represent an essential component of future long-duration space travel, the impacts of spaceflight on plant telomeres and telomerase have not been examined. Here we report on the telomere dynamics of Arabidopsis thaliana grown aboard the International Space Station. We observe no changes in telomere length in space-flown Arabidopsis seedlings, despite a dramatic increase in telomerase activity (up to 150-fold in roots), as well as elevated genome oxidation. Ground-based follow up studies provide further evidence that telomerase is induced by different environmental stressors, but its activity is uncoupled from telomere length. Supporting this conclusion, genetically engineered super-telomerase lines with enhanced telomerase activity maintain wildtype telomere length. Finally, genome oxidation is inversely correlated with telomerase activity levels. We propose a redox protective capacity for Arabidopsis telomerase that may promote survivability in harsh environments.

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“…Mitochondrial metabolism and ultrastructure are dynamic and can be modified in response to ex-V. Brykov (B) Department of Cell Biology and Anatomy, Institute of Botany of National Academy of Sciences of Ukraine, 2, Tereschenkivska St., 01601 Kyiv, Ukraine e-mail: brykovvasja@gala.net ternal stimuli. There is a significant number of publications on the changes in the structural and functional organization of mitochondria in cells of lower and higher plants in microgravity and under clinorotation (Cook and Croxdale 2003;Klimchuk 2007;Popova 2003;Sytnik and Popova 1998;Sytnik et al 1983). At the same time, the majority of such data is related to mitochondria in root meristem and root cap cells, and besides, they are contradictory (Slocum et al 1984;Tairbekov et al 1985).…”

Section: Introductionmentioning

confidence: 97%

Clinorotation Affects the Ultrastructure of Pea Root Mitochondria

Brykov

2010

Microgravity Sci. Technol.

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Effects of clinorotation on the mitochondrial ultrastructure in cells of meristem, distal and central elongation zones of 3-and 5-day-old etiolated roots of pea seedling roots were studied. It was shown that mitochondria in cells of examined root growth zones revealed a different sensitivity to clinorotation. The ultrastructure of mitochondria in the meristem and central elongation zone cells did not substantially change in comparison with stationary control. At the same time, changes in the mitochondrial ultrastructure in cells of the distal elongation zone under clinorotation were observed, namely: decrease in the size of mitochondria, as well as increase in both matrix electron density and crista volume. Such changes in the mitochondrial ultrastructure under clinorotation are supposed to display the rearrangements of energy metabolism in cells of the distal elongation zone in these conditions.

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Structural and functional features of mitochondria in statocytes of soybean root under microgravity conditions

Cited by 4 publications

References 19 publications

Comprehensive Multi-omics Analysis Reveals Mitochondrial Stress as a Central Biological Hub for Spaceflight Impact

Comprehensive Multi-omics Analysis Reveals Mitochondrial Stress as a Central Biological Hub for Spaceflight Impact

Arabidopsis telomerase takes off by uncoupling enzyme activity from telomere length maintenance in space

Clinorotation Affects the Ultrastructure of Pea Root Mitochondria

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