28354B

28354B
Caption: Pear fruit sclerenchyma cell (Pyrus sp.) - sclereid / stone cell. Shown here is a 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. Sclerenchyma is a type of supporting tissue in plants. There are two types of sclerenchyma cells: fibers and sclereids. Sclerenchyma cells are the principal supporting cells in plant tissues that have ceased elongation. 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
Type: SEM
Copyright 2008 Dennis Kunkel Microscopy, Inc.
Keywords: 07.01.08,28354B,pear,pears,pear fruit,fruit cells,fruit cell,lignified cell,lignified cells,cellulose walls,pear shaped,pear-shaped,pear shape,pear-shape,bosc pear,stone cell,stone cells,pear grit,Rosaceae,pomaceous fruit,pomaceous fruits,pome,pome fruit,pome fruits,SEM,fruit cellulose wall,fruit cellulose walls,cellulose wall,parenchyma cell,parenchyma cells,edible fruit,fruit,fruits,plant,plants,fruit fiber,fruit fibers,pear parenchyma,cell wall,cell walls,plant cell wall,plant cell walls,food,foods,edible food,edible foods,plasmodesmata,cell wall plasmodesmata,carbohydrate,carbohydrates,vitamin B2,vitamin C,B-complex vitamins,lignin,lignified cell walls,sclereids,sclereid,pear stone cell,pear stone cells,pear sclereid,pear sclereids,parenchyma,B complex vitamins,calcium,Maloideae,Pyrus,riboflavin,hemicellulose,plant tissue,plant tissues,sclerenchyma,sclerenchyma cell,sclerenchyma cells,sclerenchyma tissue,natural fabric,natural fabrics,thick cell wall,thick cell walls,plasmodesma,fiber,fibers,secondary cell wall,secondary cell walls,cell wall material,sclerenchyma fiber,sclerenchyma fibers,sclerenchyma sclereid,sclerenchyma sclereids,clerenchyma stone cell,clerenchyma stone cell. Pear fruit sclerenchyma cells (Pyrus sp.) - sclereids / stone cells. Shown here is a section through a pear fruit revealing a cluster of sclereids, also known as stone cells. Sclereids are composed of thick cell walls ,secondary wall,secondary walls