Editorial for Special Issue “Plant Mitochondria”

Taylor, Nicolas L.

doi:10.3390/ijms19123849

Cited by 8 publications

(6 citation statements)

References 23 publications

(38 reference statements)

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“…Mitochondria customarily play a central role in plant metabolism as a major source of adenosine triphosphate (ATP) [20,21]. Seeds are largely dependent on mitochondrial respiration to provide obligatory energy for their germination [22].…”

Section: Introductionmentioning

confidence: 99%

Influence of exogenous ascorbic acid and glutathione priming on mitochondrial structural and functional systems to alleviate aging damage in oat seeds

et al. 2020

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Background: Loss of vigor caused by seed aging adversely affects agricultural production under natural conditions. However, priming is an economical and effective method for improving the vigor of aged seeds. The objective of this study was to test the effectiveness of exogenous ascorbic acid (ASC) and glutathione (GSH) priming in the repairing of aged oat (Avena sativa) seeds, and to test the hypothesis that structural and functional systems in mitochondria were involved in this process. Results: Oat seeds were artificially aged for 20 days at 45°C, and were primed with solutions (1 mmol L − 1 ) of ASC, GSH, or ASC + GSH at 20°C for 0.5 h before or after their aging. Seed germination, antioxidant enzymes in the ASC-GSH cycle, cytochrome c oxidase (COX) and mitochondrial malate dehydrogenase (MDH) activities, and the mitochondrial ultrastructures of the embryonic root cells were markedly improved in aged oat seeds through post-priming with ASC, GSH, or ASC + GSH, while their malondialdehyde and H 2 O 2 contents decreased significantly (P < 0.05). Conclusion: Our results suggested that priming with ASC, GSH, or ASC + GSH after aging could effectively alleviate aging damage in oat seeds, and that the role of ASC was more effective than GSH, but positive effects of post-priming with ASC and GSH were not superior to post-priming with ASC in repairing aging damage of aged oat seeds. However, pre-priming with ASC, GSH, or ASC + GSH was not effective in oat seeds, suggesting that pre-priming with ASC, GSH, or ASC + GSH could not inhibit the occurrence of aging damage in oat seeds.

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Section: Introductionmentioning

confidence: 99%

Influence of exogenous ascorbic acid and glutathione priming on mitochondrial structural and functional systems to alleviate aging damage in oat seeds

et al. 2020

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“…When the substrates NADH and succinate are oxidized, electrons are transferred from complexes I and II to complex III via coenzyme-Q (CoQ), from complex III to complex IV via cytochrome c, and finally, to O2. During this process, the protons (H + ) in the mitochondrial matrix are pumped to the intermembrane space, resulting in a proton electrochemical potential coupled to the conversion of adenosine diphosphate (ADP) and Pi to ATP, catalyzed by complex V [ 43 ]. In the current transcriptome, no complex II subunits ( sdh3 and sdh4 ) were detected, this is consistent with the loss of the two genes in the mitochondrial genomes of other grasses ( Table S7 ), suggesting that CoQ can only obtain electrons from complex I.…”

Section: Resultsmentioning

confidence: 99%

“…In this study, mitochondrial respiration was obviously enhanced in spring shoots ( Figure 1 g), and mitochondrial transcriptome analysis showed that all enzymes involved in OXPHOS (functioning by electron transfer chain) were upregulated at the spring shoot stage ( Figure 3 a), including NADH dehydrogenase (complex I), cytochrome reductase (complex III), cytochrome oxidase (complex IV) and ATP synthase (complex V). In the process of intracellular energy conversion, ATP synthase is a key enzyme existing in the mitochondrial inner membrane that synthesizes ATP in large quantities using the proton gradient and related membrane potential [ 43 ]. In mitochondrial proteome analysis, three ATP synthase proteins (PMA, ATPF1E and ATPeF1B) were also identified to be significantly upregulated ( Table 2 ), suggesting that OXPHOS, as the main method of energy production, met the energy demand for fast-growth initiation of spring shoots.…”

Section: Discussionmentioning

confidence: 99%

Total and Mitochondrial Transcriptomic and Proteomic Insights into Regulation of Bioenergetic Processes for Shoot Fast-Growth Initiation in Moso Bamboo

Wang

Geng

Yang

et al. 2022

Cells

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As a fast-growing, woody grass plant, Moso bamboo (Phyllostachys edulis) can supply edible shoots, building materials, fibrous raw material, raw materials for crafts and furniture and so on within a relatively short time. Rapid growth of Moso bamboo occurs after the young bamboo shoots are covered with a shell and emerge from the ground. However, the molecular reactions of bioenergetic processes essential for fast growth remain undefined. Herein, total and mitochondrial transcriptomes and proteomes were compared between spring and winter shoots. Numerous key genes and proteins responsible for energy metabolism were significantly upregulated in spring shoots, including those involved in starch and sucrose catabolism, glycolysis, the pentose phosphate pathway, the tricarboxylic acid cycle and oxidative phosphorylation. Accordingly, significant decreases in starch and soluble sugar, higher ATP content and higher rates of respiration and glycolysis were identified in spring shoots. Further, the upregulated genes and proteins related to mitochondrial fission significantly increased the number of mitochondria, indirectly promoting intracellular energy metabolism. Moreover, enhanced alternate-oxidase and uncoupled-protein pathways in winter shoots showed that an efficient energy-dissipating system was important for winter shoots to adapt to the low-temperature environment. Heterologous expression of PeAOX1b in Arabidopsis significantly affected seedling growth and enhanced cold-stress tolerance. Overall, this study highlights the power of comparing total and mitochondrial omics and integrating physiochemical data to understand how bamboo initiates fast growth through modulating bioenergetic processes.

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“…Both I1K3U8 and C6SZ93 proteins participate in the carbohydrate metabolism pathway which is essential for plant response to abiotic stress including low-P ( Singh and Singh 1968 ; Rychter and Randall 1994 ; Rosa et al 2009 ). I1KW20 contributes to mitochondrial biogenesis which is a specific pathway that supports photosynthetic processes and enables continuous survival during abiotic stress exposure in plants ( Ahn et al 2006 ; Welchen et al 2014 ; Taylor 2018 ). Upregulation of proteins in these pathways as observed in L13 may have favoured the low-P tolerance.…”

Section: Discussionmentioning

confidence: 99%

Proteome characterization of two contrasting soybean genotypes in response to different phosphorus treatments

et al. 2021

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Phosphorus (P) is an essential element for the growth and development of plants. Soybean (Glycine max) is an important food crop that is grown worldwide. Soybean yield is significantly affected by P deficiency in the soil. To investigate the molecular factors that determine the response and tolerance at low-P in soybean, we conducted a comparative proteomics study of a genotype with low-P tolerance (Liaodou 13, L13) and a genotype with low-P sensitivity (Tiefeng 3 , T3) in a paper culture experiment with three P treatments i.e., P-free (0 mmol·L -1), low-P (0.05 mmol·L -1), and normal-P (0.5 mmol·L -1). A total of 4,126 proteins were identified in roots of the two genotypes. Increased numbers of differentially expressed proteins (DEPs) were obtained from low-P to P-free conditions compared to the normal P treatment. All DEPs obtained in L13 (660) were up-regulated in response to P deficiency, while most DEPs detected in T3 (133) were down-regulated under P deficiency. Important metabolic pathways such as oxidative phosphorylation, glutathione metabolism and carbon metabolism were suppressed in T3, which could have affected the survival of the plants in P-limited soil. In contrast, L13 increased the metabolic activity in the 2-oxocarboxylic acid metabolism, carbon metabolism, glycolysis, biosynthesis of amino acids, pentose phosphatase, oxidative phosphorylation, other types of O-glycan biosynthesis and riboflavin metabolic pathways in order to maintain normal plant growth under P deficiency. Three key proteins (I1KW20 (prohibitins), I1K3U8 (alpha amylase inhibitors), and C6SZ93 (alpha amylase inhibitors) were suggested as potential biomarkers for screening soybean genotypes with low P tolerance. Overall, this study provides new insights into the response and tolerance to P deficiency in soybean.

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Editorial for Special Issue “Plant Mitochondria”

Abstract: The primary function of mitochondria is respiration, where catabolism of substrates is coupled to adenosine triphosphate (ATP) synthesis via oxidative phosphorylation (OxPhos). [...]

Cited by 8 publications

References 23 publications

Influence of exogenous ascorbic acid and glutathione priming on mitochondrial structural and functional systems to alleviate aging damage in oat seeds

Influence of exogenous ascorbic acid and glutathione priming on mitochondrial structural and functional systems to alleviate aging damage in oat seeds

Total and Mitochondrial Transcriptomic and Proteomic Insights into Regulation of Bioenergetic Processes for Shoot Fast-Growth Initiation in Moso Bamboo

Proteome characterization of two contrasting soybean genotypes in response to different phosphorus treatments

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