Transcription of LANT INGDOM - NCERT
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LANT INGDOM - NCERT
PLANT KINGDOM29In the previous chapter, we looked at the broad classification of livingorganisms under the system proposed by Whittaker (1969) wherein hesuggested the Five Kingdom classification viz. Monera, Protista, Fungi,Animalia and Plantae. In this chapter, we will deal in detail with furtherclassification within Kingdom Plantae popularly known as the plantkingdom .We must stress here that our understanding of the plant kingdomhas changed over time. Fungi, and members of the Monera and Protistahaving cell walls have now been excluded from Plantae though earlierclassifications placed them in the same kingdom. So, the cyanobacteriathat are also referred to as blue green algae are not algae any more. Inthis chapter, we will describe Plantae under Algae, Bryophytes,Pteridophytes, Gymnosperms and us also look at classification within angiosperms to understandsome of the concerns that influenced the classification systems. Theearliest systems of classification used only gross superficial morphologicalcharacters such as habit, colour, number and shape of leaves, etc.
structure, anatomy, embryology and phytochemistry. Such a classification for flowering plants was given by George Bentham and Joseph Dalton Hooker. At present phylogenetic classification systems based on evolutionary relationships between the various organisms are acceptable. This assumes that organisms belonging to the same taxa have a common ...
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