Intercellular Spaces

Intercellular Spaces

 

cavities in plant tissues that are filled with air or with the secretions of surrounding cells, such as resins, essential oils, or mucus.

Based on the mode of formation, three types of intercellular spaces are distinguished. Schizogenous intercellular spaces arise as a result of the separation of neighboring cells during growth and differentiation. Often the walls separate only at the junctions at which several cells meet, and, as a result, small intercellular spaces are formed, having three or four angles in cross section and resembling narrow canals when seen in longitudinal section. As the cells separate farther, the spaces enlarge, forming stomatal apertures, the air-bearing canals in aquatic plants, the resin canals in the Coniferae, and the secretory ducts in the Compositae and Umbelliferae.

Rhexigenic intercellular spaces result from the rupture, or rhexis, and subsequent atrophy of cells. The large cavities in the internodes of stems in many Gramineae and Labiatae are formed by cellular rhexis. Lysigenous spaces, for example, the secretory cavities in the leaves of Eucalyptus and Dictamnus and in the outer layer of the pericarp of Citrus, result from the dissolution of a group of cells. Sometimes intercellular spaces of mixed origin develop, which, having been formed schizogenously, enlarge rhexigenically or lysigenously.

R. P. BARYKINA

References in periodicals archive ?
Due to the cuticle being almost waterimpermeable, most of the leaf transpiration rate (E) results from the diffusion of water vapor through the stomata and values of E depend upon two main factors: i) difference of water vapor concentration between the intercellular spaces of leaves and external atmospheric mass; and ii) diffusion resistance to this pathway (TAIZ and ZEIGER, 2013).
Electron microscopy showed aggregates of desmosomes, normal corneodesmosomes, widening of intercellular spaces, and abnormal lipid secretion.
Microvilli or villous filopodia extend into the glandular lumens or intercellular spaces created by these groupings.
The intercellular spaces immediately adjacent to the junctions varied in width but typically narrowed to 8-10 nm, where the gaps were bridged by loosely periodic material, as previously reported (Ruthmann et al.
In DIF, there is a deposit of IgG (with or without C3) in the intercellular spaces of the epidermis and/or basement membrane, and IIF shows antibodies of the IgG type.
On direct immunofluorescence (DIF), there is a fishnet pattern of deposition of C3 and IgG in the intercellular spaces of epidermis.
It estimates the distribution of body fluids in the intra and intercellular spaces in addition to the body components.
In preparation for the dormant season, cells become resistant to lower temperature through two mechanisms: dehydration through movement of water to intercellular spaces and accumulation of sugars and protein complexes that bind water and serve as cryoprotectants.
The mesophyll has uniform parenchyma constituted by isodiametric cells that are variable in size, with the formation of small intercellular spaces.
The epithelial cells display extensive infoldings of the apical and basal plasma membranes associated with mitochondria and delicate, folded lateral membranes enclose narrow intercellular spaces.
Upon exposure to low temperatures, mesophyll cells in the phyllode of Acacia melanoxylon shrank and the intercellular spaces increased with decreasing temperature, due to apparent freezing of the bulliform cells (Ruan et al.
At lower temperatures, the water has withdrawn from plant cells (to prevent them from rupture as the water expands into ice) and ice forms in the intercellular spaces.