ArticleJournal of experimental botany2017
Depletion of carbohydrate reserves limits nitrate uptake during early regrowth in Lolium perenne L.
Article in Journal of experimental botany, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 27 citations in OpenAlex.
- Possible Roles of Carbohydrate Management and Cytokinin in the Process of Defoliation-Regrowth Cycles in Rice.International journal of molecular sciences · 2024Article
- Transcriptome profiling revealed candidate genes, pathways and transcription factors related to nitrogen utilization and excessive nitrogen stress in perennial ryegrass.Scientific reports · 2022Article
- Cytokinin and abiotic stress tolerance -What has been accomplished and the way forward?Frontiers in genetics · 2022Review
- Genome-wide identification and expression analyses of nitrate transporter family genes in wild soybean (Glycine soja).Journal of applied genetics · 2020Article
- Cytokinin dehydrogenase: a genetic target for yield improvement in wheat.Plant biotechnology journal · 2020Review
- Nitrate Uptake and Transport Properties of Two Grapevine Rootstocks With Varying Vigor.Frontiers in plant science · 2020Article
- Response of cytokinins and nitrogen metabolism in the fronds of Pteris sp. under arsenic stress.PloS one · 2020Article
- Expression of Genes Related to Sugar and Amino Acid Transport and Cytokinin Metabolism during Leaf Development and Senescence inPlants (Basel, Switzerland) · 2019Article
- Identification and expression of genes associated with the abscission layer controlling seed shattering inAoB PLANTS · 2019Article
- The Sugar-Signaling Hub: Overview of Regulators and Interaction with the Hormonal and Metabolic Network.International journal of molecular sciences · 2018Review
Corrections and comments
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Authors and funding
8 authors at 4 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The mechanisms linking C/N balance to N uptake and assimilation are central to plant responses to changing soil nutrient levels. Defoliation and subsequent regrowth of grasses both impact C partitioning, thereby creating a significant point of interaction with soil N availability. Using defoliation as an experimental treatment, we investigated the dynamic relationships between plant carbohydrate status and NO3--responsive uptake systems, transporter gene expression, and nitrate assimilation in Lolium perenne L. High- and low-affinity NO3- uptake was reduced in an N-dependent manner in response to a rapid and large shift in carbohydrate remobilization triggered by defoliation. This reduction in NO3- uptake was rescued by an exogenous glucose supplement, confirming the carbohydrate dependence of NO3- uptake. The regulation of NO3- uptake in response to the perturbation of the plant C/N ratio was associated with changes in expression of putative high- and low-affinity NO3- transporters. Furthermore, NO3- assimilation appears to be regulated by the C-N status of the plant, implying a mechanism that signals the availability of C metabolites for NO3- uptake and assimilation at the whole-plant level. We also show that cytokinins may be involved in the regulation of N acquisition and assimilation in response to the changing plant C/N ratio.
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