Results 151 to 160 of about 1,784,085 (182)
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Aphid activities during sieve element punctures
Entomologia Experimentalis et Applicata, 1994AbstractAphid salivation in sieve elements and phloem sap ingestion were linked to waveforms in the Electrical Penetration Graph (EPG). Non‐viruliferous Rhopalosiphum padi (L.) (Hemiptera, Aphididae) on barley yellow dwarf virus (BYDV) infected wheat could acquire the virus, which was used as an indication for phloem sap ingestion, whereas virus ...
Prado, E., Tjallingii, W.F.
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1975
Although it is now more than a hundred years since Hartig (1837, 1860) first discovered sieve tubes, and associated solute transport with sieve elements, the structure of functioning sieve elements and the mechanism of phloem transport are still controversial issues.
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Although it is now more than a hundred years since Hartig (1837, 1860) first discovered sieve tubes, and associated solute transport with sieve elements, the structure of functioning sieve elements and the mechanism of phloem transport are still controversial issues.
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Sieve element plastids in bamboo
Experientia, 1978The fine structure of the sieve element plastids ofBambusa vulgaris andSchizostachyum lumampao revealed the typical monocotyledonous type (P-type) with the cuneate proteinaceous bodies and lattice-like crystalloids; in addition, characteristically formed vesicles and tubulae could be observed. The diagnostic value of these plastids is also discussed.
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Soluble and filamentous proteins in Arabidopsis sieve elements
Plant, Cell & Environment, 2012ABSTRACTPhloem sieve elements are highly differentiated cells involved in the long‐distance transport of photoassimilates. These cells contain both aggregated phloem‐proteins (P‐proteins) and soluble proteins, which are also translocated by mass flow. We used liquid chromatography–tandem mass spectrometry (LC‐MS/MS) to carry out a proteomic survey of ...
Batailler, Brigitte +7 more
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Sieve Elements: The Favourite Habitat of Phytoplasmas
2018The sieve elements are the only plant compartments, where phytoplasmas can survive and propagate. Therefore, this chapter is focussed on the specific molecular and cell-biological properties of the sieve element. Sieve element-companion cell complexes arise from (pro)cambial mother cells induced by key genes known to be decisive for sieve-element ...
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SLIME SUBSTANCE AND STRANDS IN SIEVE ELEMENTS
American Journal of Botany, 1964Studies of the secondary phloem of 6 species of woody dicotyledons revealed that slime is not normally dispersed throughout the vacuole of mature sieve elements, but occurs in the form of discrete strands that traverse the cell and run from cell to cell through the sieve‐plate pores. As many as 5 fine strands, each measuring less than 0.5μ in diameter,
R. F. Evert, W. F. Derr
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Occurrence of Sieve Elements in Phloem Rays
IAWA Journal, 1997Solitary sieve elements or groups of sieve elements were encountered in the rays of secondary phloem of Erythrina indica, Guazuma tomentosa, Acacia nilotica, Azadirachta indica, and Tectona grandis trees. These elements were short and possessed simple and compound sieve plates on their transverse to slightly oblique end walls.
Kishore S. Rajput, K. S. Rao
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1975
Sieve elements typically have non-lignified cellulosic walls similar to those of parenchyma cells. The walls are often thickened and in most instances this thickening is described as “nacreous” thickening or the “nacre” wall. The term “nacre” was introduced because of the refractve properties of this wall and its characteristic lustre when viewed with ...
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Sieve elements typically have non-lignified cellulosic walls similar to those of parenchyma cells. The walls are often thickened and in most instances this thickening is described as “nacreous” thickening or the “nacre” wall. The term “nacre” was introduced because of the refractve properties of this wall and its characteristic lustre when viewed with ...
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Botanica Acta, 1995
AbstractThe sieve‐element characters of 34 species from the Proteaceae and Elaeagnaceae have been studied by transmission electron microscopy. While nondispersive protein bodies and dispersive P‐protein are typical components of both families, specific forms and/or their distinctive origin accentuate some taxa.
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AbstractThe sieve‐element characters of 34 species from the Proteaceae and Elaeagnaceae have been studied by transmission electron microscopy. While nondispersive protein bodies and dispersive P‐protein are typical components of both families, specific forms and/or their distinctive origin accentuate some taxa.
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Modeling the Hydraulic Conductivity of Phloem Sieve Elements
2019Phloem transport of photoassimilates affects nearly all aspects of plant life, from growth to reproduction. This chapter summarizes mathematical techniques to quantify the impact of sieve element anatomy on phloem transport processes.
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