ArticlePlant physiology2004
Evidence for apoplasmic phloem unloading in developing apple fruit.
Article in Plant physiology, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 73 papers.
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Who cites it
73 citing papers in PubMed, 253 citations in OpenAlex.
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- Sugar import mediated by sugar transporters and cell wall invertases for seed development inHorticulture research · 2024Article
- Sugar delivery at the tomato root and root galls after Meloidogyne incognita infestation.BMC plant biology · 2024Article
- Significance of Raffinose Family Oligosaccharides (RFOs) metabolism in plants.Advanced biotechnology · 2024Review
- Evaluation of the Carbohydrate Composition of Crabapple Fruit Tissues Native to Northern Asia.Plants (Basel, Switzerland) · 2023Article
- Phloem unloading in cultivated melon fruits follows an apoplasmic pathway during enlargement and ripening.Horticulture research · 2023Article
- Mutation of CsARC6 affects fruit color and increases fruit nutrition in cucumber.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023Article
- The Surprising Dynamics of Electrochemical Coupling at Membrane Sandwiches in Plants.Plants (Basel, Switzerland) · 2023Article
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- Effects of Phytochelatin-like Gene on the Resistance and Enrichment of CdInternational journal of molecular sciences · 2022Article
- Systematic analysis of the sugar accumulation mechanism in sucrose- and hexose- accumulating cherry tomato fruits.BMC plant biology · 2022Article
- Versatile roles of sorbitol in higher plants: luxury resource, effective defender or something else?Planta · 2022Review
- Integrative Physiological and Transcriptomic Analysis Reveals the Transition Mechanism of Sugar Phloem Unloading Route inInternational journal of molecular sciences · 2022Article
- Plasmodesmata and their role in the regulation of phloem unloading during fruit development.Current opinion in plant biology · 2021Review
- Photosynthetic contribution and characteristics of cucumber stems and petioles.BMC plant biology · 2021Article
- Molecular basis for optimizing sugar metabolism and transport during fruit development.aBIOTECH · 2021Review
- Direct evidence for dynamics of cell heterogeneity in watercored apples: turgor-associated metabolic modifications and within-fruit water potential gradient unveiled by single-cell analyses.Horticulture research · 2021Article
- Predominantly symplastic phloem unloading of photosynthates maintains efficient starch accumulation in the cassava storage roots (Manihot esculenta Crantz).BMC plant biology · 2021Article
13 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
10 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The phloem unloading pathway remains unclear in fleshy fruits accumulating a high level of soluble sugars. A structural investigation in apple fruit (Malus domestica Borkh. cv Golden Delicious) showed that the sieve element-companion cell complex of the sepal bundles feeding the fruit flesh is symplasmically isolated over fruit development. 14C-autoradiography indicated that the phloem of the sepal bundles was functional for unloading. Confocal laser scanning microscopy imaging of carboxyfluorescein unloading showed that the dye remained confined to the phloem strands of the sepal bundles from the basal to the apical region of the fruit. A 52-kD putative monosaccharide transporter was immunolocalized predominantly in the plasma membrane of both the sieve elements and parenchyma cells and its amount increased during fruit development. A 90-kD plasma membrane H(+)-ATPase was also localized in the plasma membrane of the sieve element-companion cell complex. Studies of [14C]sorbitol unloading suggested that an energy-driven monosaccharide transporter may be functional in phloem unloading. These data provide clear evidence for an apoplasmic phloem unloading pathway in apple fruit and give information on the structural and molecular features involved in this process.
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