Economical importance of bryophytes

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ECOLOGICAL IMPORTANCE OF BRYOPHYTES Mosses and Bryophytes are the first organiasms to colonise rocks. They colonise rock by acidic secretion. This acidic secretion is due to the death of mosses. When the rock is decomposed it helps in soil formation. Therefore New soils are formed. The soil act as binders.  It prevent soil erosion. The water retention capacity of the soil is high ie, water holding capacity of the soil is high.  This reduces surface water run-off which prevent soil erosion. Bryophyte helps in the recycling of nutrients. ECONOMICAL IMPORTANCE OF BRYOPHYTES. 1) SPHAGNUM Sphagnum has high absorptive power with antiseptic property. This can be used to replace cotton in bandages. 2) MERCHANTIA   Mercahntia cures pulmonary tuberculosisand affliction (pain) in liver. Antibiotic substances are also extracted from bryophytes. it also acts as antiseptic, and as preservative POLYTRICHUM Polytrichum dissolove stone in kidney and in gall bladder. 3) IN RESEARCH It is u...
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Prescott system of classification of algae

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Prescott's system of classification


     G.W. Prescott proposed his system of classification in 1969 in his book 'The algae :A Review. ' for his classification he considered following criterias as follows. 

1.Presence or absence of True nucleus. 
2.cell wall- structures and chemical composition
3.flagella- their types, number and position of insertion. 
4.photosynthetic pigments- their kinds, chemical composition and relative amount. 
5.. Photosynthetic products- their chemical nature. 
6.life cycle and reproduction-morphology of reproductive structures and methods of reproduction. 

 He classified algae into nine phyla. His classification outlined below. 


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