A famous botanist F.E. Fritsch (1935) classified algae into following 11 classes, based on pigmentation, reserve food material, flagellation and reproduction. Class 1. Chlorophyceae (= Isokontae): Generally algae are fresh water and chlorophyllous thallophytes. Chlorophyll b and carotenoides are present in chloroplasts. The cell wall is made up of cellulose and food is synthesized in the form of starch. Motile [...]
Actinomycetes are classified into 7 families. The classification is based on hyphal and reproductive structures. Family 1: Streptomycetaceae: Hyphae non-fragmented, aerial mycelium with chains of spores with 5 to 50 or more conidia per chain e.g. Streptomyces, Microdlobaspone and Sporictilhya. Family 2: Nocardiaceae: Hyphae typically fragmented e.g. Nocardia, Pseudonocardia. Family 3: Micromononsporaceae: Hyphae non-fragmented conidia borne singly or in pairs [...]
In this article we will discuss about:- 1. Meaning of Chemo-taxis 2. Demonstration of Chemo-taxis 3. Chemotactic Behaviour of Bacteria. Meaning of Chemo-Taxis: Chemo-taxis is the movement of bacteria towards chemical attraction and away from chemical repellants. Bacteria are attracted towards the nutrients such as sugars and amino acids, and are repelled by harmful substances and bacterial wastes. They also [...]