Results 131 to 140 of about 1,784,085 (182)

Single-cell RNA-sequencing profiles reveal the developmental landscape of hawthorn leaves. [PDF]

BMC Plant Biol
Zhao G, Wu X, Wang B, Li X, Zheng J, Ding Z, Li G, Zhang T.   +7 more
europepmc   +1 more source

Stationary sieve element proteins

Journal of Plant Physiology, 2021
Vascular plants use the phloem to move sugars and other molecules from source leaves to sink organs such as roots and fruits. Within the phloem, enucleate sieve elements provide the low-resistance pipe system that enable bulk flow of sap. In this review, we provide an overview of the highly specific protein machinery that localize to mature sieve ...
Alexander Schulz, Niels Christian Sanden
exaly   +5 more sources

PHLOEM UNLOADING: Sieve Element Unloading and Post-Sieve Element Transport

Annual Review of Plant Physiology and Plant Molecular Biology, 1997
▪ Abstract  The transport events from the sieve elements to the sites of utilization within the recipient sink cells contribute to phloem unloading. The phenomenon links sink metabolism and/or compartmentation with phloem transport to, and partitioning between, sinks.
J. W. Patrick
openaire   +3 more sources

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Foliar sieve elements: Nexus of the leaf

Journal of Plant Physiology, 2022
In this review, a central position of foliar sieve elements in linking leaf structure and function is explored. Results from studies involving plants grown under, and acclimated to, different growth regimes are used to identify significant, linear relationships between features of minor vein sieve elements and those of 1) leaf photosynthetic capacity ...
William W. Adams III, Jared J. Stewart, Stephanie K. Polutchko, Barbara Demmig-Adams   +3 more
openaire   +2 more sources

Sieve element biology provides leads for research on phytoplasma lifestyle in plant hosts

Journal of Experimental Botany, 2019
Phytoplasmas reside exclusively in sieve tubes, tubular arrays of sieve element-companion cell complexes. Hence, the cell biology of sieve elements may reveal (ultra)structural and functional conditions that may be of significance for survival ...
Rita Musetti, Aart van Bel, Van Bel Aart J E   +2 more
exaly   +2 more sources

Sieve elements caught in the act

Trends in Plant Science, 2002
Phloem is a puzzling plant tissue owing to the unique natural defence responses of the sieve elements to any kind of mechanical manipulation. Recent non-invasive studies have enabled real-time observation of events in intact sieve tubes, including mass transport, sieve-pore sealing and conformational changes of structural proteins.
Aart J E, van Bel, Katrin, Ehlers, Michael, Knoblauch   +2 more
openaire   +2 more sources

Endoplasmic reticulum in the sieve element of Cucurbita

Journal of Ultrastructure Research, 1968
The endoplasmic reticulum (ER) in immature sieve elements of Cucurbita maxima Duchesne resembles that of other types of nucleate cells in morphology and distribution. In mature sieve elements the ER assumes two forms. One of these is represented by a network closely applied to the plasma membrane lining the cell wall.
K, Esau, J, Cronshaw
openaire   +2 more sources

On the occurrence of nuclei in mature sieve elements

Planta, 1970
The secondary phloem of 3 species of the Taxodiaceae and 13 species of woody dicotyledons was examined for the occurrence of nuclei in mature sieve elements. Nuclei were found in all mature sieve cells of Metasequoia glyptostroboides, Sequoia sempervirens and Taxodium distichum, and in some mature sieve-tube members in 12 of the 13 species of woody ...
R F, Event, J D, Davis, C M, Tucker, F J, Alfieri   +3 more
openaire   +2 more sources

Lignified sieve elements in the wheat leaf

Planta, 1974
Sieve elements with thick, lignified walls are identified in the longitudinal bundles of the wheat leaf and appear to be functional. They are also present in several festucoid grasses but appear to be absent from the panicoid grasses examined.
J, Kuo, T P, O'Brien
openaire   +2 more sources

A reevaluation of extruded nucleoli in sieve elements

Journal of Ultrastructure Research, 1970
Immature and mature sieve elements of Populus deltoides, Quercus alba, Salix nigra, Tilia americana, and Rhus glabra were examined with light and electron microscopes. Sieve elements of the first four species contain persistent spherical inclusions similar to those heretofore interpreted as extruded nucleoli.
B P, Deshpande, R F, Evert
openaire   +2 more sources