Properties of Protoplasm

The protoplasm is a living component of the plant cell and includes four portions

(i) The cytoplasm
(ii) The vacuoles
(iii) A number of organelles
(iv) The nucleus.

In young cells, the vacuoles are numerous, small and scattered, while in a mature cell, there is a single large vacuole engaging the centre of the cell and the cytoplasm builds a thin peripheral layer about the vacuole.

Physical Nature of Protoplasm

Most of the theories have been put forth to elucidate the physical nature of the protoplasm.

The Alveolar foam Theory:

Butschili in the year 1882 stated that the protoplasm is a semi-transparent, slimy and viscous substance, basically a liquid holding a foaming or alveolar structure.

Colloidal Theory:

Wilson Fischer in the year 1894 considered the protoplasm as a polyphase colloidal system.

This theory is a broadly accepted as one of the protoplasm is seen to show the properties of colloids.

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