Pear Sclereid Or Stone Cell (pyrus Sp.) #3 is a photograph by Dennis Kunkel Microscopy/science Photo Library which was uploaded on October 3rd, 2018.
Pear Sclereid Or Stone Cell (pyrus Sp.) #3
Pear fruit (Pyrus sp.) sclerenchyma cell, scanning electron micrograph (SEM). Section through a pear fruit revealing a sclereid, also known as a... more
Title
Pear Sclereid Or Stone Cell (pyrus Sp.) #3
Artist
Dennis Kunkel Microscopy/science Photo Library
Medium
Photograph
Description
Pear fruit (Pyrus sp.) sclerenchyma cell, scanning electron micrograph (SEM). Section through a pear fruit revealing a sclereid, also known as a stone cell. Sclereids (sclerenchyma cells) are cells composed of thick cell walls that surround a very small cell cavity. The thick cell walls consist of cellulose, hemicellulose and lignin and often show distinct layering. The small holes within the cell wall layers are called plasmodesmata. Plasmodesmata are microscopic channels, in plants, traversing the cell walls of plant cells and enabling transport and communication between them. Although cell walls are permeable to small soluble proteins and other solutes, plasmodesmata enable direct, regulated, intercellular transport of substances between cells. Mature sclerenchyma is composed of dead cells with extremely thick cell walls (secondary walls) that make up to 90% of the whole cell volume. Magnification: x160 when shortest axis printed at 25 millimetres.
Uploaded
October 3rd, 2018
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