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New Phytologist, 2023 SummaryThe evolution of the plant vascular system is a key process in Earth history because it enabled plants to conquer land and transform the terrestrial surface. Among the vascular tissues, the phloem is particularly intriguing because of its complex functionality.
C. Hardtke
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Journal of Experimental Botany, 2014 The phloem is the long-distance solute-conducting tissue of plants. The observation of phloem cells is particularly challenging for several reasons and many recent advances in microscopy are, therefore, especially beneficial for the study of phloem anatomy and physiology.
Elisabeth Trüernit +1 more
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Current Opinion in Plant Biology, 2018 The complex form of higher plants requires continuous, balanced transport of nutrients in the phloem. The initial step of transferring sugars, amino acids, and other materials from photosynthetic cells to the conducting sieve tubes is known as phloem loading. Three phloem loading mechanisms have been described.
Cankui, Zhang, Robert, Turgeon
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Distinct identities of leaf phloem cells revealed by single cell transcriptomics.
The Plant Cell, 2021 The leaf vasculature plays a key role in solute translocation. Veins consist of at least seven distinct cell types, with specific roles in transport, metabolism, and signaling.
Ji-Yun Kim +13 more
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Phloem iron remodels root development in response to ammonium as the major nitrogen source
Nature Communications, 2022 Plants use nitrate and ammonium as major nitrogen (N) sources, each affecting root development through different mechanisms. However, the exact signaling pathways involved in root development are poorly understood.
X. Liu +10 more
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Dual-function DEFENSIN 8 mediates phloem cadmium unloading and accumulation in rice grains
Plant Physiology, 2022 Grain cadmium (Cd) is translocated from source to sink tissues exclusively via phloem, though the phloem Cd unloading transporter has not been identified yet.
Tian-Yu Gu +6 more
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The evolution of minor vein phloem and phloem loading [PDF]
American Journal of Botany, 2001 Phylogenetic analysis provides a rational basis for comparative studies of phloem structure and phloem loading. Although several types of minor vein companion cell have been identified, and progress has been made in correlating structural features of these cells with loading mechanisms, little is known about the phylogenetic relationships of the ...
R, Turgeon, R, Medville, K C, Nixon
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Evidence for phloem loading via the abaxial bundle sheath cells in maize leaves
The Plant Cell, 2021 Maize appears to use a previously undescribed phloem loading mechanism, in which abaxial bundle sheath cells export sucrose to transfer it to the vasculature.
Margaret Bezrutczyk +7 more
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Cell-by-cell dissection of phloem development links a maturation gradient to cell specialization
Science, 2021 Description Root meristem controls The plant meristem, a small cluster of stem cells generates all of the cell types necessary for the plant’s indeterminate growth pattern. Roszak et al.
Pawel Roszak +31 more
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Ecohydrology, 2022 The stable isotopes of hydrogen and oxygen in xylem water are often used to investigate tree water sources. But this traditional approach does not acknowledge the contribution of water stored in the phloem to transpiration and how this may affect xylem ...
M. Nehemy +6 more
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