sieve element


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Related to sieve element: sieve plate, sieve tube

sieve element

n.
One of the food-conducting cells of phloem in vascular plants; a sieve cell or a sieve-tube element.
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The time to the first sieve element penetration with saliva secretion (E1) brief (U = 178, P = 0.
invicta the total duration of the path wave was significantly shortened as well as the time of first sieve element penetration with saliva secretion (E1), whereas the duration of the F waveform was not significantly different between the ant-tended and untended treatments.
np] -- Number of waveform np (no penetration) per insect 1st P Min Time to first penetration (waveform C) per insect 1st E1 Min Time to first sieve element penetration with saliva secretion per insect 1st E2 Min Time to first sieve elements with sap ingestion per insect 1st Pd Min Time to waveform Pd event per insect 1st G Min Time to waveform G event per insect 1st F Min Time to waveform F event per insect 1st E1e Min Time to waveform E1e event per insect %E2 -- Percent of mealybugs produce waveform E2 %G -- Percent of mealybugs produce waveform G %E1e -- Percent of mealybugs produce waveform E1e %F -- Percent of mealybugs produce waveform F TABLE 2.
The topics include fundamentals of phloem transport physiology, roles of plasma membrane transporters in phloem functions, sieve element occlusion, the effect of long-distance signaling on development, and the behavioral and molecular-genetic basis of resistance against phloem-feeding insects.
1957) had brought the once controversial matter of plasmolyzability of the sieve element into relation with other concepts concerning the connection between structure and function in the conduit of the phloem tissue.
The main topics of research at UC Santa Barbara, as at UC Davis, were the structure and development of the phloem tissue, especially the sieve element, and the appearance and fate of the virus in plant cells.
In-cab adjustment of the chaffer's louver opening and the sieve elements is also included on the self-leveling shoe system.
Sieve plates are scalariform, showing radial and tangetial distribution in sieve elements and a high staining reaction for cellulose and hemicellulose.
This cells are surrounding the sieve elements and tend to form bands slightly dilated as far as 610 [micron]m from the vascular cambium.
Living material is a prerequisite for fixation of sieve elements and the eventual investigation of their plastids with the transmission electron microscope.
An ontogenetic study of phloem in Saruma, comparing differentiating and mature sieve elements (Fig.