ArticlePlanta2004
The role of amylomaltase in maltose metabolism in the cytosol of photosynthetic cells.
Article in Planta, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 83 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
83 citing papers in PubMed, 208 citations in OpenAlex.
- GWAS and haplotype analysis reveal the intricate interplay of hormones in rice seed germination under hypoxic conditions.3 Biotech · 2025Article
- Old player, new roles: defining the role of the plastidial phosphorylase.The New phytologist · 2025Review
- The plastidial α-glucan phosphorylase modulates maltodextrin metabolism and affects starch parameters in Arabidopsis thaliana.Journal of experimental botany · 2025Article
- Comparative phenotypic, physiological, and transcriptomic responses to drought and recovery in two Fraxinus species.BMC plant biology · 2025Article
- Extreme heat affects blueberry pollen nutrition, bee health, and plant reproduction.Scientific reports · 2025Article
- Modulation of the Arabidopsis Starch Metabolic Network by the Cytosolic Acetyl-CoA Pathway in the Context of the Diurnal Illumination Cycle.International journal of molecular sciences · 2024Article
- A neutral invertase controls cell division besides hydrolysis of sucrose for nutrition during germination and seed setting in rice.iScience · 2024Article
- The end game(s) of photosynthetic carbon metabolism.Plant physiology · 2024Review
- Transcriptomic and physiological responses ofFrontiers in plant science · 2024Article
- Leaf starch metabolism sets the phase of stomatal rhythm.The Plant cell · 2023Article
- OsDPE2 Regulates Rice Panicle Morphogenesis by Modulating the Content of Starch.Rice (New York, N.Y.) · 2023Article
- Cytosolic disproportionating enzyme2 is essential for pollen germination and pollen tube elongation in rice.Plant physiology · 2023Article
- Elevated COPlants (Basel, Switzerland) · 2022Article
- Potential Role ofFrontiers in plant science · 2022Article
- Starch Granule Size and Morphology ofMolecules (Basel, Switzerland) · 2021Article
- Contrasting anther glucose-6-phosphate dehydrogenase activities between two bean varieties suggest an important role in reproductive heat tolerance.Plant, cell & environment · 2021Article
- Starch Granules inInternational journal of molecular sciences · 2021Article
- Genome-wide identification of BAM genes in grapevine (Vitis vinifera L.) and ectopic expression of VvBAM1 modulating soluble sugar levels to improve low-temperature tolerance in tomato.BMC plant biology · 2021Article
- Maltose Processing and Not β-Amylase Activity Curtails Hydrolytic Starch Degradation in the CAM OrchidFrontiers in plant science · 2019Article
- Genome-Wide Association Study Using Historical Breeding Populations Discovers Genomic Regions Involved in High-Quality Rice.The plant genome · 2018Article
23 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Transitory starch is stored during the day inside chloroplasts and then broken down at night for export. Recent data indicate that maltose is the major form of carbon exported from the chloroplast at night but its fate in the cytosol is unknown. An amylomaltase gene ( malQ) cloned from Escherichia coli is necessary for maltose metabolism in E. coli. We investigated whether there is an amylomaltase in the cytosol of plant leaves and the role of this enzyme in plants. Two mutants of Arabidopsis thaliana (L) Heynh. were identified in which the gene encoding a putative amylomaltase enzyme [ disproportionating enzyme 2, DPE2 (DPE1 refers to the plastid version of this enzyme)] was disrupted by a T-DNA insertion. Both dpe2-1 and dpe2-2 plants exhibited a dwarf phenotype and accumulated a large amount of maltose. In addition, dpe2 mutants accumulated starch and a water-soluble, ethanol/KCl-insoluble maltodextrin in their chloroplasts. At night, the amount of sucrose in dpe2 plants was lower than that in wild-type plants. These results show that Arabidopsis has an amylomaltase that is involved in the conversion of maltose to sucrose in the cytosol. We hypothesize that knocking out amylomaltase blocks the conversion from maltose to sucrose, and that the higher amount of maltose feeds back to limit starch degradation reactions in chloroplasts. As a result, dpe2 plants have higher maltose, higher starch, and higher maltodextrin but lower nighttime sucrose than wild-type plants. Finally, we propose that maltose metabolism in the cytosol of Arabidopsis leaves is similar to that in the cytoplasm of E. coli.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.