Tag Archives | Botany

Chemical Composition of Cell Wall (With Diagram) | Plants

The cell wall is mainly composed of carbohydrate rich materials. The major components of cell wall are cellulose, pectins, hemicelluloses, proteins and phenolics. The cell wall is a biphasic structure consisting of relatively rigid cellulosic microfibril embedded in gel-like non-cellulosic matrix. The microfibrillar phase consists of only cellulose (β1, 4-glucan) and the matrix is composed of non-cellulosic polysaccharides and other [...]

By |2016-12-12T06:55:54+00:00December 12, 2016|Cell Wall|Comments Off on Chemical Composition of Cell Wall (With Diagram) | Plants
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Chemical Changes in the Cell Wall: 5 Phenomenon | Plants

The following points highlight the five phenomenon that takes place because of the chemical changes in the cell wall. The phenomenon are: 1. Lignification 2. Cutinization 3. Suberinization 4. Mineralization 5. Mucilaginous Change. Phenomenon # 1. Lignification: In this phenomenon lignin is the substance of impregnation. Lignin is a phenolic polymer and contains three subunits namely-coumaryl, guiacyl and sinapyl-propane. It [...]

By |2016-12-12T06:55:54+00:00December 12, 2016|Cell Wall|Comments Off on Chemical Changes in the Cell Wall: 5 Phenomenon | Plants
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Layers of the Spore and Pollen Wall | Plants

In this article we will discuss about the layers of the spore and pollen wall. Sporoderm stratification (Erdtman's concept): Sporoderm (L. sporodermis), i.e. the spore and pollen wall is composed of distinct layers or subdivisions, the sequence of which is as follows from outside inwards in a fresh pollen grain and spore. Sclerine (Gr. Scleros means hard-Fig. 4.1 A & [...]

By |2016-12-12T06:55:53+00:00December 12, 2016|Pollen and Spore Walls|Comments Off on Layers of the Spore and Pollen Wall | Plants
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