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 ?
At lower temperatures, the water has withdrawn from plant cells (to prevent them from rupture as the water expands into ice) and ice forms in the intercellular spaces.
The researchers then subjected the samples to a vacuum perfusion process to force the bacterial cells into the intercellular spaces in the leaves.
Both have undergone changes and intercellular contacts, as evidenced by the widening of intercellular spaces, the rounding of individual cells and release them from the neighbouring cells.
These data indicate that jojoba oil's skin moisturizing and softening action is enacted both by the formation of a semi-permeable, protective surface lipid layer and permeation into the comeal layer's intercellular spaces.
The microfilariae normally migrate in the intercellular spaces of the skin which usually leads to many reactions including leopard skin, premature ageing and blindness (1).
The most undifferentiated pinnules were represented by those of "stage one", where all epidermal cells were rectangular and lacked large intercellular spaces (Fig.
Then they were subjected to a vacuum perfusion process to force the bacterial cells into the intercellular spaces in the leaves.
The cells of the septum are different in size and they are prolonged longitudinally, with few intercellular spaces in P.
Basal cell hyperplasia, papillary lengthening, and dilatation of intercellular spaces also correlate with eosinophil degranulation (67); however, the latter feature that can also be produced by biopsy processing.
Conversely, Mauseth (1988) states that in typical xerophytic plants, the spongy mesophyll may be lost altogether with only palisade parenchyma remaining, or there may be no intercellular spaces at all (Mauseth 1988).
Lipids are produced by the epidermal cells and excreted into the intercellular spaces to form the well-known 'bricks and mortar' arrangement in the upper epidermal layers (the cells are the bricks and the lipids form the mortar) where they make a major contribution to the epidermal barrier as well as protecting against bacteria and other infections.
It has been reported that blind pits and intercellular spaces might serve as an extracellular diffusion pathway for heartwood substances (Zhang et al.