In this article we will discuss about the ultrastructure of eukaryotic algal cell with the help of suitable diagrams. Cell Wall: The cell is bounded by a thin, cellulose cell wall. Cellulose layer is finely striated with parallel cellulose fibrils (Fig. 1). In many species there is a pectose layer external to it which dissolves in water and forms a [...]
The following points highlight the six main criterions on which modern concepts of classification of algae is based. The criterions are: 1. Nuclear Organization 2. Nature of Cell Wall Components 3. Pigmentation and Photosynthetic Apparatus 4. Nature of Reserve Food 5. Flagellation 6. Type of Life Cycle and Reproduction. Criteria # 1. Nuclear Organization: On the basis of nuclear organization [...]
In this article we will discuss about ectomycorrhizal versus endomycorrhizal fungi. Ectomycorrhizal Fungi: In ectomycorrhizal association, the fungus forms a mantle or sheath over the surface of fine lateral roots of the host trees and sends some hyphae into the intercellular spaces of the outer cortex forming a so-called Hartignet. Arbuscules and vesicles, characteristically present in endomycorrhizae are absent. The [...]