ArticlePlant physiology2002
L-Ascorbic acid is accumulated in source leaf phloem and transported to sink tissues in plants.
Article in Plant physiology, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.
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Who cites it
40 citing papers in PubMed, 172 citations in OpenAlex.
- Identifying chickpea (Cicer arietinum L.) genotypes rich in ascorbic acid as a source of drought tolerance.Scientific reports · 2025Article
- The ascorbate biosynthesis pathway in plants is known, but there is a way to go with understanding control and functions.Journal of experimental botany · 2024Review
- Article
- L-Ascorbic acid metabolism and regulation in fruit crops.Plant physiology · 2023Article
- Genetic and biochemical strategies for regulation of L-ascorbic acid biosynthesis in plants through the L-galactose pathway.Frontiers in plant science · 2023Review
- Metabolism and Regulation of Ascorbic Acid in Fruits.Plants (Basel, Switzerland) · 2022Review
- Gene expression profiling inFrontiers in plant science · 2022Article
- Valorization of MoroccanTheScientificWorldJournal · 2022Article
- The role of GDP-l-galactose phosphorylase in the control of ascorbate biosynthesis.Plant physiology · 2021Article
- Valorization of MoroccanBioMed research international · 2020Article
- Biosynthetic Gene Pyramiding Leads to Ascorbate Accumulation with Enhanced Oxidative Stress Tolerance in Tomato.International journal of molecular sciences · 2019Article
- Snakin-1 affects reactive oxygen species and ascorbic acid levels and hormone balance in potato.PloS one · 2019Article
- Ascorbic acid metabolism and functions: A comparison of plants and mammals.Free radical biology & medicine · 2018Review
- Characterization of TwoReactive oxygen species (Apex, N.C.) · 2017Article
- Characterization of the galactono-1,4-lactone dehydrogenase from pepper fruits and its modulation in the ascorbate biosynthesis. Role of nitric oxide.Redox biology · 2017Article
- Connecting Source with Sink: The Role of Arabidopsis AAP8 in Phloem Loading of Amino Acids.Plant physiology · 2016Article
- Rice GDP-mannose pyrophosphorylase OsVTC1-1 and OsVTC1-3 play different roles in ascorbic acid synthesis.Plant molecular biology · 2016Article
- Effects of salinity and ascorbic acid on growth, water status and antioxidant system in a perennial halophyte.AoB PLANTS · 2015Article
- Patterns of evolutionary conservation of ascorbic acid-related genes following whole-genome triplication in Brassica rapa.Genome biology and evolution · 2014Article
- Role of L-ascorbate in alleviating abiotic stresses in crop plants.Botanical studies · 2014Review
Corrections and comments
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
L-Ascorbic acid (AsA) was found to be loaded into phloem of source leaves and transported to sink tissues. When L-[(14)C]AsA was applied to leaves of intact plants of three different species, autoradiographs and HPLC analysis demonstrated that AsA was accumulated into phloem and transported to root tips, shoots, and floral organs, but not to mature leaves. AsA was also directly detected in Arabidopsis sieve tube sap collected from an English green aphid (Sitobion avenae) stylet. Feeding a single leaf of intact Arabidopsis or Medicago sativa with 10 or 20 mM L-galactono-1,4-lactone (GAL-L), the immediate precursor of AsA, lead to a 7- to 8-fold increase in AsA in the treated leaf and a 2- to 3-fold increase of AsA in untreated sink tissues of the same plant. The amount of AsA produced in treated leaves and accumulated in sink tissues was proportional to the amount of GAL-L applied. Studies of the ability of organs to produce AsA from GAL-L showed mature leaves have a 3- to 10-fold higher biosynthetic capacity and much lower AsA turnover rate than sink tissues. The results indicate AsA transporters reside in the phloem, and that AsA translocation is likely required to meet AsA demands of rapidly growing non-photosynthetic tissues. This study also demonstrates that source leaf AsA biosynthesis is limited by substrate availability rather than biosynthetic capacity, and sink AsA levels may be limited to some extent by source production. Phloem translocation of AsA may be one factor regulating sink development because AsA is critical to cell division/growth.
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