ArticleFrontiers in plant science2016
Alternative Oxidase Pathway Optimizes Photosynthesis During Osmotic and Temperature Stress by Regulating Cellular ROS, Malate Valve and Antioxidative Systems.
Article in Frontiers in plant science, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.
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29 citing papers in PubMed, 68 citations in OpenAlex.
- Essential mitochondrial activity in Physcomitrium patens relies on complementary cytochrome and alternative oxidase pathways.The Plant journal : for cell and molecular biology · 2026Article
- Responses and adaptations of plants to abiotic stress: transcriptional regulation of secondary metabolic pathways, metabolomics, and nanobiological approaches.Frontiers in genetics · 2026Review
- Advancements in photosynthetic efficiency: Pathways, regulation, and biotechnological applications for enhancing crop productivity.Plant signaling & behavior · 2025Review
- Integrated 16 S rRNA and transcriptome analysis reveal molecular and microbial mechanisms of cold-tolerant germination in hulless barley.BMC genomics · 2025Article
- The high production of tropane alkaloids in hairy roots of Hyoscyamus reticulatus L. elicited by ZnO NPs in a bioreactor condition.Scientific reports · 2025Article
- Brassinolide sustains photosynthesis during high-light stress by modulating mitochondrial electron transport and cellular ROS.Journal of biosciences · 2025Article
- Mitochondrial Reactive Oxygen Species in Infection and Immunity.Biomolecules · 2024Review
- Physiological and Proteomic Responses of the TetraploidInternational journal of molecular sciences · 2024Article
- Nanobiotechnology-mediated regulation of reactive oxygen species homeostasis under heat and drought stress in plants.Frontiers in plant science · 2024Review
- Exacerbation of drought-induced physiological and biochemical changes in leaves ofJournal of biosciences · 2024Article
- Temperature dependence of OThe New phytologist · 2023Article
- Brassinolide promotes interaction between chloroplasts and mitochondria during the optimization of photosynthesis by the mitochondrial electron transport chain in mesophyll cell protoplasts ofFrontiers in plant science · 2023Article
- Identification of potential light deficiency response regulators in endangered species Magnolia sinostellata.Scientific reports · 2022Article
- Metabolism and Signaling of Plant Mitochondria in Adaptation to Environmental Stresses.International journal of molecular sciences · 2022Review
- Alternative oxidase (AOX) 1a and 1d limit proline-induced oxidative stress and aid salinity recovery in Arabidopsis.Plant physiology · 2022Article
- Identification and Functional Characterization of a Putative Alternative Oxidase (Aox) inJournal of fungi (Basel, Switzerland) · 2022Article
- CarrotPlants (Basel, Switzerland) · 2021Article
- Light Deficiency Inhibits Growth by Affecting Photosynthesis Efficiency as well as JA and Ethylene Signaling in Endangered PlantPlants (Basel, Switzerland) · 2021Article
- Distinct roles of alternative oxidase pathway during the greening process of etiolated algae.Science China. Life sciences · 2021Article
- Effective Use of Water in Crop Plants in Dryland Agriculture: Implications of Reactive Oxygen Species and Antioxidative System.Frontiers in plant science · 2021Review
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The present study reveals the importance of alternative oxidase (AOX) pathway in optimizing photosynthesis under osmotic and temperature stress conditions in the mesophyll protoplasts of Pisum sativum. The responses of photosynthesis and respiration were monitored at saturating light intensity of 1000 μmoles m(-2) s(-1) at 25°C under a range of sorbitol concentrations from 0.4 to 1.0 M to induce hyper-osmotic stress and by varying the temperature of the thermo-jacketed pre-incubation chamber from 25 to 10°C to impose sub-optimal temperature stress. Compared to controls (0.4 M sorbitol and 25°C), the mesophyll protoplasts showed remarkable decrease in NaHCO3-dependent O2 evolution (indicator of photosynthetic carbon assimilation), under both hyper-osmotic (1.0 M sorbitol) and sub-optimal temperature stress conditions (10°C), while the decrease in rates of respiratory O2 uptake were marginal. The capacity of AOX pathway increased significantly in parallel to increase in intracellular pyruvate and reactive oxygen species (ROS) levels under both hyper-osmotic stress and sub-optimal temperature stress under the background of saturating light. The ratio of redox couple (Malate/OAA) related to malate valve increased in contrast to the ratio of redox couple (GSH/GSSG) related to antioxidative system during hyper-osmotic stress. Further, the ratio of GSH/GSSG decreased in the presence of sub-optimal temperature, while the ratio of Malate/OAA showed no visible changes. Also, the redox ratios of pyridine nucleotides increased under hyper-osmotic (NADH/NAD) and sub-optimal temperature (NADPH/NADP) stresses, respectively. However, upon restriction of AOX pathway by using salicylhydroxamic acid (SHAM), the observed changes in NaHCO3-dependent O2 evolution, cellular ROS, redox ratios of Malate/OAA, NAD(P)H/NAD(P) and GSH/GSSG were further aggravated under stress conditions with concomitant modulations in NADP-MDH and antioxidant enzymes. Taken together, the results indicated the importance of AOX pathway in optimizing photosynthesis under both hyper-osmotic stress and sub-optimal temperatures. Regulation of ROS through redox couples related to malate valve and antioxidant system by AOX pathway to optimize photosynthesis under these stresses are discussed.
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