ArticleThe Plant cell2021
Evidence for phloem loading via the abaxial bundle sheath cells in maize leaves.
Article in The Plant cell, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 74 papers.
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Who cites it
74 citing papers in PubMed, 136 citations in OpenAlex.
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- Evaluating Causal Claims in Plant Developmental Metabolism: A When-Where-How Framework.Plants (Basel, Switzerland) · 2026Review
- Single-Cell and Spatial Omics Technologies in Rice Abiotic Stress Biology: A Methodological Review.International journal of molecular sciences · 2026Review
- Genome-Wide Identification of the Soybean UMAMIT Family and Functional Analysis ofInternational journal of molecular sciences · 2026Article
- Single-cell RNA-sequencing profiles reveal the developmental landscape of hawthorn leaves.BMC plant biology · 2026Article
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- Integrated experimental and computational workflows for single-cell transcriptomics in plants.Plant methods · 2026Article
- Conserved spatial patterning of gene expression in independent lineages of CThe New phytologist · 2026Article
- Comparative single-cell transcriptomic map reveals divergence in leaves between two cotton species at cell type resolution.Journal of advanced research · 2026Article
- Intercellular compartmentation of trehalose 6-phosphate metabolism in Setaria viridis leaves.Journal of experimental botany · 2025Article
- Unlocking grass leaf development: foundations for tunable cereal design.The New phytologist · 2025Review
- snRNA-Seq Unveils Cell-Type-Specific Immune Dynamics in Arabidopsis During Pinewood Nematode Infection.Molecular plant pathology · 2025Article
- Genomic and Cis-Regulatory Basis of a Plastic CAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025Article
- Single-cell omics in plant biology: mechanistic insights and applications for crop improvement.Advanced biotechnology · 2025Review
- PhytoCluster: a generative deep learning model for clustering plant single-cell RNA-seq data.aBIOTECH · 2025Article
- Identification of maize genes that condition early systemic infection of sugarcane mosaic virus through single-cell transcriptomics.Plant communications · 2025Article
- Systems analysis of long-term heat stress responses in the C4 grass Setaria viridis.The Plant cell · 2025Article
- Single-cell RNA sequencing reveals a key regulator ZmEREB14 affecting shoot apex development and yield formation in maize.Plant biotechnology journal · 2025Article
14 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
8 authors at 2 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Leaves are asymmetric, with different functions for adaxial and abaxial tissue. The bundle sheath (BS) of C3 barley (Hordeum vulgare) is dorsoventrally differentiated into three types of cells: adaxial structural, lateral S-type, and abaxial L-type BS cells. Based on plasmodesmatal connections between S-type cells and mestome sheath (parenchymatous cell layer below bundle sheath), S-type cells likely transfer assimilates toward the phloem. Here, we used single-cell RNA sequencing to investigate BS differentiation in C4 maize (Zea mays L.) plants. Abaxial BS (abBS) cells of rank-2 intermediate veins specifically expressed three SWEET sucrose uniporters (SWEET13a, b, and c) and UmamiT amino acid efflux transporters. SWEET13a, b, c mRNAs were also detected in the phloem parenchyma (PP). We show that maize has acquired a mechanism for phloem loading in which abBS cells provide the main route for apoplasmic sucrose transfer toward the phloem. This putative route predominates in veins responsible for phloem loading (rank-2 intermediate), whereas rank-1 intermediate and major veins export sucrose from the PP adjacent to the sieve element companion cell complex, as in Arabidopsis thaliana. We surmise that abBS identity is subject to dorsoventral patterning and has components of PP identity. These observations provide insights into the unique transport-specific properties of abBS cells and support a modification to the canonical phloem loading pathway in maize.
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