ArticleFrontiers in plant science2022
Delayed Leaf Senescence by Upregulation of Cytokinin Biosynthesis Specifically in Tomato Roots.
Article in Frontiers in plant science, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed, 27 citations in OpenAlex.
- Tomato Leaf Color Diversity as a Functional Trait: Molecular Mechanisms, Physiological Significance, and Environmental Responses.International journal of molecular sciences · 2026Review
- Suppressing GhCKX optimizes the trade-off between photosynthesis and water use efficiency in cotton mature leaves under drought.The Plant journal : for cell and molecular biology · 2026Article
- Machine Learning-Driven Construction of High-Yielding Cucumber Plant Architectures in Greenhouse Environments.Plant biotechnology journal · 2026Article
- Review
- An overview of low-oxygen sensing and flooding responses of tomato.Journal of experimental botany · 2025Review
- Mechanistic Insights into Cytokinin-Regulated Leaf Senescence in Barley: Genotype-Specific Responses in Physiology and Protein Stability.International journal of molecular sciences · 2025Article
- Kinetin and arbuscular mycorrhizal fungi: vital regulators of Vicia faba plants' response and tolerance to drought stress.BMC plant biology · 2025Article
- Article
- Laser dissection-assisted phloem transcriptomics highlights the metabolic and physiological changes accompanying clubroot disease progression in oilseed rape.The Plant journal : for cell and molecular biology · 2025Article
- Validation of stay-green and stem reserve mobilization QTLs: physiological and gene expression approach.Frontiers in plant science · 2025Article
- Mechanisms of Cannabis Growth Promotion byPlants (Basel, Switzerland) · 2024Article
- Cytokinin: From autoclaved DNA to two-component signaling.The Plant cell · 2024Review
- Recent Advances in Studying the Regulation of Fruit Ripening in Tomato Using Genetic Engineering Approaches.International journal of molecular sciences · 2024Review
- Identification and Expression Analysis of the Isopentenyl Transferase (IPT) Gene Family under Lack of Nitrogen Stress in Oilseed (Plants (Basel, Switzerland) · 2023Article
- Recent Advances in the Bacterial Phytohormone Modulation of Plant Growth.Plants (Basel, Switzerland) · 2023Article
- Rol-Transformed Kalanchoë Shows Altered Root Allocation and Photosynthetic Responses to Nitrogen Deficiency.Physiologia plantarumArticle
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Cytokinins (CKs) regulate numerous plant developmental processes, including photosynthesis and leaf senescence. Isopentenyltransferase (IPT) is a rate-limiting enzyme in the CK-biosynthesis pathway. We overexpressed ipt under tissue-specific promoters to study the long-range effect of CK on the functioning of tomato source leaves. Photosynthetic activity over time provided the measure for leaf aging. Significantly delayed leaf senescence was observed in plants expressing ipt under a root-specific promoter, but not in those expressing the gene under a source leaf-specific promoter. The root-derived influence on leaf aging was further confirmed by grafting experiments. CK concentration in source leaves of both transgenic lines increased significantly, with different proportions of its various derivatives. On the other hand, root CK concentration was only slightly elevated. Nevertheless, the significant change in the proportion of CK derivatives in the root indicated that CK biosynthesis and metabolism were altered. Partial leaf defoliation upregulates photosynthetic rate in the remaining leaf; however, overexpression of ipt in either tissues eliminated this response. Interestingly, stem girdling also eliminated the photosynthetic response. Taken together, our findings suggest that leaf senescence is regulated by a CK-mediated root-shoot communication network. We propose that CK-mediated signal is translocated to the leaf via the xylem where it alters CK biosynthesis, resulting in delayed senescence.
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