ArticleAnnals of botany2008
Changes in photosynthetic rates and gene expression of leaves during a source-sink perturbation in sugarcane.
Article in Annals of botany, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.
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Who cites it
24 citing papers in PubMed, 106 citations in OpenAlex.
- Variation of leaf photosynthetic traits is mostly driven by changes in source-sink relationship rather than irradiance in pear tree canopies.BMC plant biology · 2026Article
- Drought priming promotes phloem loading-driven sucrose export to alleviate the photosynthetic limitations under low nitrogen stress in wheat seedlings.Frontiers in plant science · 2026Article
- Clinical-grade plant-made nanomaterials: from process design to the construction of a manufacturing facility.Frontiers in plant science · 2025Article
- Allele-Specific Hormone Dynamics in Highly Transgressive F2 Biomass Segregants in Sugarcane (Plants (Basel, Switzerland) · 2024Article
- Sugar sensing in C4 source leaves: a gap that needs to be filled.Journal of experimental botany · 2024Review
- Current perspectives on the regulatory mechanisms of sucrose accumulation in sugarcane.Heliyon · 2024Review
- Excised leaves show limited and species-specific effects on photosynthetic parameters across crop functional types.Journal of experimental botany · 2023Article
- Sugar accumulation enhancement in sorghum stem is associated with reduced reproductive sink strength and increased phloem unloading activity.Frontiers in plant science · 2023Article
- Physiology and whole-plant carbon partitioning during stem sugar accumulation in sweet dwarf sorghum.Planta · 2021Article
- Improving C4 photosynthesis to increase productivity under optimal and suboptimal conditions.Journal of experimental botany · 2021Article
- Changes in Photosynthesis Could Provide Important Insight into the Interaction between Wheat and Fungal Pathogens.International journal of molecular sciences · 2021Review
- A source-sink model explains the difference in the metabolic mechanism of mechanical damage to young and senescing leaves in Catharanthus roseus.BMC plant biology · 2021Article
- Decarboxylation mechanisms of C4 photosynthesis in Saccharum spp.: increased PEPCK activity under water-limiting conditions.BMC plant biology · 2019Article
- Gibberellin-induced perturbation of source-sink communication promotes sucrose accumulation in sugarcane.3 Biotech · 2018Article
- Light-Dependent Changes in the Spatial Localization of Metabolites inFrontiers in plant science · 2018Article
- Genome-Wide Transcriptional Profile Analysis of Prunus persica in Response to Low Sink Demand after Fruit Removal.Frontiers in plant science · 2016Article
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- Role of metabolite transporters in source-sink carbon allocation.Frontiers in plant science · 2013Article
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Corrections and comments
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Authors and funding
3 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsIn crops other than sugarcane there is good evidence that the size and activity of carbon sinks influence source activity via sugar-related regulation of the enzymes of photosynthesis, an effect that is partly mediated through coarse regulation of gene expression.
methodsIn the current study, leaf shading treatments were used to perturb the source-sink balance in 12-month-old Saccharum spp. hybrid 'N19' (N19) by restricting source activity to a single mature leaf. Changes in leaf photosynthetic gas exchange variables and leaf and culm sugar concentrations were subsequently measured over a 14 d period. In addition, the changes in leaf gene response to the source-sink perturbation were measured by reverse northern hybridization analysis of an array of 128 expressed sequence tags (ESTs) related to photosynthetic and carbohydrate metabolism. KEY
resultsSucrose concentrations in immature culm tissue declined significantly over the duration of the shading treatment, while a 57 and 88% increase in the assimilation rate (A) and electron transport rate (ETR), respectively, was observed in the source leaf. Several genes (27) in the leaf displayed a >2-fold change in expression level, including the upregulation of several genes associated with C(4) photosynthesis, mitochondrial metabolism and sugar transport. Changes in gene expression levels of several genes, including Rubisco (EC 4.1.1.39) and hexokinase (HXK; EC 2.7.1.1), correlated with changes in photosynthesis and tissue sugar concentrations that occurred subsequent to the source-sink perturbation.
conclusionsThese results are consistent with the notion that sink demand may limit source activity through a kinase-mediated sugar signalling mechanism that correlates to a decrease in source hexose concentrations, which, in turn, correlate with increased expression of genes involved in photosynthesis and metabolite transport. The signal feedback system reporting sink sufficiency and regulating source activity may be a potentially valuable target for future genetic manipulation to increase sugarcane sucrose yield.
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