ArticlePlant molecular biology1996
Sugars act as signal molecules and osmotica to regulate the expression of alpha-amylase genes and metabolic activities in germinating cereal grains.
Article in Plant molecular biology, 1996. 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, 138 citations in OpenAlex.
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- Adequate water supply enhances seedling growth and metabolism in Festuca kryloviana: insights from physiological and transcriptomic analys.BMC plant biology · 2024Article
- Sugar starvation activates the OsSnRK1a-OsbHLH111/OsSGI1-OsTPP7 module to mediate growth inhibition of rice.Plant biotechnology journal · 2023Article
- The rice SnRK family: biological roles and cell signaling modules.Frontiers in plant science · 2023Review
- Enhancement in Seed Priming-Induced Starch Degradation of Rice Seed Under Chilling Stress via GA-Mediated α-Amylase Expression.Rice (New York, N.Y.) · 2022Article
- The Rice Small Auxin-Up RNA GeneInternational journal of molecular sciences · 2021Article
- The Molecular Regulatory Pathways and Metabolic Adaptation in the Seed Germination and Early Seedling Growth of Rice in Response to Low OPlants (Basel, Switzerland) · 2020Review
- Sugar starvation-regulated MYBS2 and 14-3-3 protein interactions enhance plant growth, stress tolerance, and grain weight in rice.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Identification of sugar response complex in the metallothionein OsMT2b gene promoter for enhancement of foreign protein production in transgenic rice.Plant cell reports · 2019Article
- The Rice Alpha-Amylase, Conserved Regulator of Seed Maturation and Germination.International journal of molecular sciences · 2019Review
- Red to Far-Red Light Ratio Modulates Hormonal and Genetic Control of Axillary bud Outgrowth in Chrysanthemum (International journal of molecular sciences · 2018Article
- The Glucose Sensor MdHXK1 Phosphorylates a Tonoplast NaPlant physiology · 2018Article
- Suppression of glucan, water dikinase in the endosperm alters wheat grain properties, germination and coleoptile growth.Plant biotechnology journal · 2016Article
- Accumulation of nickel ions in seedlings of Vicia sativa L. and manifestations of oxidative stress.Environmental science and pollution research international · 2015Article
- Analysis of Stress-Responsive Gene Expression in Cultivated and Weedy Rice Differing in Cold Stress Tolerance.PloS one · 2015Article
- Starch bioengineering affects cereal grain germination and seedling establishment.Journal of experimental botany · 2014Article
- The modified rice αAmy8 promoter confers high-level foreign gene expression in a novel hypoxia-inducible expression system in transgenic rice seedlings.Plant molecular biology · 2014Article
- A rice lectin receptor-like kinase that is involved in innate immune responses also contributes to seed germination.The Plant journal : for cell and molecular biology · 2013Article
- Sugar starvation- and GA-inducible calcium-dependent protein kinase 1 feedback regulates GA biosynthesis and activates a 14-3-3 protein to confer drought tolerance in rice seedlings.Plant molecular biology · 2013Article
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The molecular mechanisms that initiate and control the metabolic activities of seed germination are largely unknown. Sugars may play important roles in regulating such metabolic activities in addition to providing an essential carbon source for the growth of young seedlings and maintaining turgor pressure for the expansion of tissues during germination. To test this hypothesis, we investigated the physiological role of sugars in the regulation of alpha-amylase gene expression and carbohydrate metabolism in embryo and endosperm of germinating rice seeds. RNA gel blot analysis revealed that in the embryo and aleurone cells, expression of four alpha-amylase genes was differentially regulated by sugars via mechanisms beyond the well-known hormonal control mechanism. In the aleurone cells, expression of these alpha-amylase genes was regulated by gibberellins produced in the embryo and by osmotically active sugars. In the embryo, expression of two alpha-amylase genes and production of gibberellins were transient, and were probably induced by depletion of sugars in the embryo upon imbibition, and suppressed by sugars influx from the endosperm as germination proceeded. The deferential expression of the four alpha-amylase genes in the embryo and aleurone cells was probably due to their markedly different sensitivities to changes in tissue sugar levels. Our study supports a model in which sugars regulate the expression of alpha-amylase genes in a tissue-specific manner: via a feedback control mechanism in the embryo and via an osmotic control mechanism in the aleurone cells. An interactive loop among sugars, gibberellins, and alpha-amylase genes in the germinating cereal grain is proposed.
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