ArticlePlant physiology2004
Plastidial alpha-glucan phosphorylase is not required for starch degradation in Arabidopsis leaves but has a role in the tolerance of abiotic stress.
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 92 papers.
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92 citing papers in PubMed, 254 citations in OpenAlex.
- Transcriptomic Analysis of Osmotic Stress-Tolerant Somatic Embryos ofInternational journal of molecular sciences · 2025Article
- Transcriptomics analysis for elucidating the mechanism underlying the enhancement of Arabidopsis Thaliana growth by the endophytic fungus Clonostachys rosea.Archives of microbiology · 2025Article
- Old player, new roles: defining the role of the plastidial phosphorylase.The New phytologist · 2025Review
- Plastidial starch phosphorylase regulates maltodextrin turnover during starch granule initiation in Arabidopsis leaves.Plant physiology · 2025Article
- The plastidial α-glucan phosphorylase modulates maltodextrin metabolism and affects starch parameters in Arabidopsis thaliana.Journal of experimental botany · 2025Article
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- Kinetic and Structural Studies of the PlastidialACS omega · 2024Article
- Genome-wide identification of starch phosphorylase gene family in Rosa chinensis and expression in response to abiotic stress.Scientific reports · 2024Article
- Transcriptome Analysis Reveals Novel Genes Potentially Involved in Tuberization in Potato.Plants (Basel, Switzerland) · 2024Article
- Initiation of B-type starch granules in wheat endosperm requires the plastidial α-glucan phosphorylase PHS1.The Plant cell · 2023Article
- Soluble and insoluble α-glucan synthesis in yeast by enzyme suites derived exclusively from maize endosperm.Plant physiology · 2023Article
- Gene expression profile of the developing endosperm in durum wheat provides insight into starch biosynthesis.BMC plant biology · 2023Article
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- Genome-Wide Identification of DOF Gene Family and the Mechanism Dissection ofInternational journal of molecular sciences · 2022Article
- B vitamin supply in plants and humans: the importance of vitamer homeostasis.The Plant journal : for cell and molecular biology · 2022Review
- Genome-wide identification of BAM (β-amylase) gene family in jujube (Ziziphus jujuba Mill.) and expression in response to abiotic stress.BMC genomics · 2022Article
- Starch biosynthesis in guard cells has features of both autotrophic and heterotrophic tissues.Plant physiology · 2022Article
- Comparative Study of Starch Phosphorylase Genes and Encoded Proteins in Various Monocots and Dicots with Emphasis on Maize.International journal of molecular sciences · 2022Article
- Article
32 more citing papers are in PubMed but not listed here.
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Authors and funding
10 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
To study the role of the plastidial alpha-glucan phosphorylase in starch metabolism in the leaves of Arabidopsis, two independent mutant lines containing T-DNA insertions within the phosphorylase gene were identified. Both insertions eliminate the activity of the plastidial alpha-glucan phosphorylase. Measurement of other enzymes of starch metabolism reveals only minor changes compared with the wild type. The loss of plastidial alpha-glucan phosphorylase does not cause a significant change in the total accumulation of starch during the day or its remobilization at night. Starch structure and composition are unaltered. However, mutant plants display lesions on their leaves that are not seen on wild-type plants, and mesophyll cells bordering the lesions accumulate high levels of starch. Lesion formation is abolished by growing plants under 100% humidity in still air, but subsequent transfer to circulating air with lower humidity causes extensive wilting in the mutant leaves. Wilted sectors die, causing large lesions that are bordered by starch-accumulating cells. Similar lesions are caused by the application of acute salt stress to mature plants. We conclude that plastidial phosphorylase is not required for the degradation of starch, but that it plays a role in the capacity of the leaf lamina to endure a transient water deficit.
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