ArticlePlanta2004
Maltose is the major form of carbon exported from the chloroplast at night.
Article in Planta, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers.
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Who cites it
79 citing papers in PubMed, 233 citations in OpenAlex.
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- Plastidial starch phosphorylase regulates maltodextrin turnover during starch granule initiation in Arabidopsis leaves.Plant physiology · 2025Article
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- Metabolic flux analysis of the non-transitory starch tradeoff for lipid production in mature tobacco leaves.Metabolic engineering · 2022Article
- Resolving diurnal dynamics of the chloroplastic glutathione redox state in Arabidopsis reveals its photosynthetically derived oxidation.The Plant cell · 2021Article
- Contrasting anther glucose-6-phosphate dehydrogenase activities between two bean varieties suggest an important role in reproductive heat tolerance.Plant, cell & environment · 2021Article
- New insights into the response of maize to fluctuations in the light environment.Molecular genetics and genomics : MGG · 2021Article
- The Phosphofructokinase Isoform AtPFK5 Is a Novel Target of Plastidic Thioredoxin-f-Dependent Redox Regulation.Antioxidants (Basel, Switzerland) · 2021Article
- A review of starch biosynthesis in cereal crops and its potential breeding applications in rice (PeerJ · 2021Article
- Identification of the Carbohydrate and Organic Acid Metabolism Genes Responsible for Brix in Tomato Fruit by Transcriptome and Metabolome Analysis.Frontiers in genetics · 2021Article
- Targeted delivery of nanomaterials with chemical cargoes in plants enabled by a biorecognition motif.Nature communications · 2020Article
19 more citing papers are in PubMed but not listed here.
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PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Transitory starch is formed in chloroplasts during the day and broken down at night. We investigated carbon export from chloroplasts resulting from transitory-starch breakdown. Starch-filled chloroplasts from spinach ( Spinacia oleracea L. cv. Nordic IV) were isolated 1 h after the beginning of the dark period and incubated for 2.5 h, followed by centrifugation through silicone oil. Exported products were measured in the incubation medium to avoid measuring compounds retained inside the chloroplasts. Maltose and glucose made up 85% of the total exported products and were exported at rates of 626 and 309 nmol C mg(-1) chlorophyll h(-1), respectively. Net export of phosphorylated products was less than 5% and higher maltodextrins were not detected. Maltose levels in leaves of bean ( Phaseolus vulgaris L. cv. Linden), spinach, and Arabidopsis thaliana (L.) Heynh. were low in the light and high in the dark. Maltose levels remained low and unchanged during the light/dark cycle in two starch-deficient Arabidopsis mutants, stf1, deficient in plastid phosphoglucomutase, and pgi, deficient in plastid phosphoglucoisomerase. Through the use of nonaqueous fractionation, we determined that maltose was distributed equally between the chloroplast and cytosolic fractions during darkness. In the light there was approximately 24% more maltose in the cytosol than the chloroplast. Taken together these data indicate that maltose is the major form of carbon exported from the chloroplast at night as a result of starch breakdown. We hypothesize that the hydrolytic pathway for transitory-starch degradation is the primary pathway used when starch is being converted to sucrose and that the phosphorolytic pathway provides carbon for other purposes.
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