PLANT KINGDOM
IMPORTANT POINTS
Fungi, monerans, protists were earlier included in plant Kingdom but not now. BGA i
Various Systems of classification
Earlier systems were based on gross morphology like habitat,
colour, no. & shape of leaf
Artificial system Natural system
Based on natural affinities among
Based mainly on vegetative characters
organisms & consider external, internal,
(easily affected) or on the androecium ev
ultra structure, anatomy, embryology,
structure. Eg- Linnaeus classification of
photochemistry. Eg- George Bentham
plants based on no. Of androecium.
& Joseph Dalton Hooker classification
It had drawbacks like it separated
of flowering plants
closely related species, were based on
few characters & equal weightage
given to vegetative & sexual characters
DIFFERENT KINDS OF TAXONOMY
NUMERICAL CHEMOTAXONOMY
TAXONOMY
Chemical constituents o
Based on observable
the plant to resolve confus
characters using computers
(no. & codes are assigned to
each character) each
character is given equal
CYTOTAXONOMY
importance. Based on
chromosome no.,
structure, behaviour
IMPORTANT POINTS
Fungi, monerans, protists were earlier included in plant Kingdom but not now. BGA i
Various Systems of classification
Earlier systems were based on gross morphology like habitat,
colour, no. & shape of leaf
Artificial system Natural system
Based on natural affinities among
Based mainly on vegetative characters
organisms & consider external, internal,
(easily affected) or on the androecium ev
ultra structure, anatomy, embryology,
structure. Eg- Linnaeus classification of
photochemistry. Eg- George Bentham
plants based on no. Of androecium.
& Joseph Dalton Hooker classification
It had drawbacks like it separated
of flowering plants
closely related species, were based on
few characters & equal weightage
given to vegetative & sexual characters
DIFFERENT KINDS OF TAXONOMY
NUMERICAL CHEMOTAXONOMY
TAXONOMY
Chemical constituents o
Based on observable
the plant to resolve confus
characters using computers
(no. & codes are assigned to
each character) each
character is given equal
CYTOTAXONOMY
importance. Based on
chromosome no.,
structure, behaviour
