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- Title
Histochemistry, ultrastructure and possible significance of dead parenchyma cells with specialized walls in the leaf and rhizome <em>Sansevieria</em>.
- Authors
Ghashghaie, J.; Saugier, B.
- Abstract
The internal parenchyma of the leaf and rhizome in 36 species of <em>Sansevieria</em> is made of dead cells and living cells arranged in a regular pattern. Intercellular spaces are lacking. The walls of dead cells consist of an inner amorphous layer positive to the fluorescence test for callose, a middle suberin-like layer and an outer fibrillar layer. In about half of the species examined, the inner layer forms distinctive thickenings. Detached leaves of <em>Sansevieria</em> lose water very slowly, and are able to recover it quickly. The pattern of leaf dehydration appears to be related to leaf morphology, whereas no relation is evident between the pattern of leaf rehydration and leaf morphology. Neither leaf dehydration nor leaf rehydration pattern is affected by the presence of wall thickenings in the dead parenchyma cells. The fresh weight per unit volume of both turgid and droughted leaves is nearly I, denoting that the dead cells are filled with water and do not undergo substantial cavitation during drought. The data indicate that the dead parenchyma cells of <em>Sansevieria</em> are a specialized water-storing system.
- Subjects
HISTOCHEMISTRY; ULTRASTRUCTURE (Biology); PLANT parenchyma; SANSEVIERIA; LEAVES
- Publication
Plant, Cell & Environment, 1989, Vol 12, Issue 3, p249
- ISSN
0140-7791
- Publication type
Article
- DOI
10.1111/j.1365-3040.1989.tb01939.x