ArticlePlant physiology2011
The physiological role of ascorbate as photosystem II electron donor: protection against photoinactivation in heat-stressed leaves.
Article in Plant physiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 55 papers, 1 of them a synthesis that pooled it.
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Who cites it
55 citing papers in PubMed, 1 synthesis or guideline pooled it, 163 citations in OpenAlex.
- Genetic Variation and Hot Flashes: A Systematic Review.The Journal of clinical endocrinology and metabolism · 2020Pooled it
- Photosystem II Responses at the Whole-Potato-Leaf Level After Colorado Potato Beetle Feeding.Plants (Basel, Switzerland) · 2026Article
- Revealing Missing Links in the Downsizing of the Photosystem II Antenna in Higher Plants Under Stress Conditions.Antioxidants (Basel, Switzerland) · 2025Article
- The Compensatory Response of Photosystem II Photochemistry to Short-Term Insect Herbivory Is Suppressed Under Water Deficit.Insects · 2025Article
- The xanthophyll cycle balances photoprotection and photosynthetic efficiency in the seawater alga Nannochloropsis oceanica.Plant physiology · 2025Article
- Responses of Tomato Photosystem II Photochemistry to Pegylated Zinc-Doped Ferrite Nanoparticles.Nanomaterials (Basel, Switzerland) · 2025Article
- Chloroplastic ascorbate modifies plant metabolism and may act as a metabolite signal regardless of oxidative stress.Plant physiology · 2024Article
- Deciphering the Mechanism of Melatonin-Induced Enhancement of Photosystem II Function in Moderate Drought-Stressed Oregano Plants.Plants (Basel, Switzerland) · 2024Article
- Multiple Physiological and Biochemical Functions of Ascorbic Acid in Plant Growth, Development, and Abiotic Stress Response.International journal of molecular sciences · 2024Review
- Antioxidants of Non-Enzymatic Nature: Their Function in Higher Plant Cells and the Ways of Boosting Their Biosynthesis.Antioxidants (Basel, Switzerland) · 2023Review
- Genome-wide association study unveils ascorbate regulation by PAS/LOV PROTEIN during high light acclimation.Plant physiology · 2023Article
- Modification of Tomato Photosystem II Photochemistry with Engineered Zinc Oxide Nanorods.Plants (Basel, Switzerland) · 2023Article
- Impact of Coated Zinc Oxide Nanoparticles on Photosystem II of Tomato Plants.Materials (Basel, Switzerland) · 2023Article
- The lifetime of the oxygen-evolving complex subunit PSBO depends on light intensity and carbon availability in Chlamydomonas.Plant, cell & environment · 2023Article
- The Functions of Chloroplastic Ascorbate in Vascular Plants and Algae.International journal of molecular sciences · 2023Review
- Single-cell microfluidics in combination with chlorophyllPhotosynthetica · 2023Article
- Article
- Potential of engineering the myo-inositol oxidation pathway to increase stress resilience in plants.Molecular biology reports · 2022Review
- Response ofPhysiology and molecular biology of plants : an international journal of functional plant biology · 2022Article
- Heat Stress-Mediated Constraints in Maize (Frontiers in plant science · 2022Review
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Previously, we showed that ascorbate (Asc), by donating electrons to photosystem II (PSII), supports a sustained electron transport activity in leaves in which the oxygen-evolving complexes were inactivated with a heat pulse (49°C, 40 s). Here, by using wild-type, Asc-overproducing, and -deficient Arabidopsis (Arabidopsis thaliana) mutants (miox4 and vtc2-3, respectively), we investigated the physiological role of Asc as PSII electron donor in heat-stressed leaves (40°C, 15 min), lacking active oxygen-evolving complexes. Chlorophyll-a fluorescence transients show that in leaves excited with trains of saturating single-turnover flashes spaced 200 ms apart, allowing continual electron donation from Asc to PSII, the reaction centers remained functional even after thousands of turnovers. Higher flash frequencies or continuous illumination (300 μmol photons m(-2) s(-1)) gradually inactivated them, a process that appeared to be initiated by a dramatic deceleration of the electron transfer from Tyr(Z) to P680(+), followed by the complete loss of charge separation activity. These processes occurred with half-times of 1.2 and 10 min, 2.8 and 23 min, and 4.1 and 51 min in vtc2-3, the wild type, and miox4, respectively, indicating that the rate of inactivation strongly depended on the Asc content of the leaves. The recovery of PSII activity, following the degradation of PSII proteins (D1, CP43, and PsbO), in moderate light (100 μmol photons m(-2) s(-1), comparable to growth light), was also retarded in the Asc-deficient mutant. These data show that high Asc content of leaves contributes significantly to the ability of plants to withstand heat-stress conditions.
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