The formation of intercellular spaces in the cotyledons of developing and germinating pea seeds.

Autor: Kollöffel, C., Linssen, P.
Zdroj: Protoplasma; 1984, Vol. 120 Issue 1/2, p12-19, 8p
Abstrakt: Electron microscopic observations have shown that the intercellular spaces in the storage parenchyma of the cotyledons of pea ( Pisum sativum L.) seeds arise schizogenously. The wall segments adjoining future intercellular spaces display a triple zonation and contain regions with electron-dense material. Space formation starts at the central point of contact between several cells and spreads then further up to the electron-dense, intra-wall structures. As a result of this the electron-dense material is found again in the corners of intercellular spaces. It is proposed that the intra-wall structures may have an important function in limiting the schizogenous process. The localization of the intercellular spaces is thus predetermined. The amount of electron-dense material in their corners increases considerably during further development of the embryo. During germination wall segments between two intercellular spaces diverge resulting in a fusion of several spaces. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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