SYSTEMATICS LECTURE

• naming, describing, identifying and classifying plants

  Plant taxonomy
• major parts of systematics


  Taxonomy
• what are the four components of taxonomy

  Description, identification, Nomenclature and Classification
• who introduced a system for grouping species in increasingly broad categories

  Carolous linnaeus also known as Carl von Linne'
• What are the taxonomic groups?

  Domain, Kingdom, Division, Class, Order, Family, Genus, Species
• A taxonomic unit at any level of hierarchy

  Taxon
• assignment of features or attributes to a taxon

  Description
• The features assigned to a taxon is called

  Character
• Two or more form of character is called

  Character state
• A character is a trait


  morphological, physiological, biochemical and molecular
• it is used by systematist to help determine evolutionary relationship between different taxa

  character
• Any attribute of organism or of a group of organism by which it differs from an organism belonging to a different taxonomic category or resembles an organism belonging to the same category.

  Taxonomic Character
• Plant growth habit, leaf arrangement and shape, spore, seeds , flower, fruit

  Morphology
• Xylem, phloem, epidermis including trichomes and stomata

  Anatomy
• Pollen characteristics including size, shape and apertures

  Palynology
• Alkaloid, phenolic, Amino acid, Protein, Enzymes and DNA

  Chemical and Molecular
• Anatomy


  What kind of Taxonomic Character?

  
• Palynology


  What kind of Taxonomic Character?

  
• Chemical and Molecular


  What kind of Taxonomic Character

  
• Morphology


  What kind of Taxonomic Character?

  
• What are the methods of Identification?

  Expert determination, Recognition, Comparison, and the Use of keys and similar devices
• The keys which are the most common, were probably first published by Jean Baptiste-Lamarck

  Dichotomus Key
• Who published the Dichotomous Key?

  Jean Baptiste Lamarck (1778)
• Consist of a series of paired statements, termed couplets, that describe some feature of the organism. The statements, or leads are in direct contrast.

  Dichotomous key
• Also called "yoked"

  Indented keys
• Type of Dichotomous keys favored by Botanist

  Indented Dichotomous Key
• Indents the choices of the couplet an equal distance from the left margin. The two choices of the couplet are usually labelled 1a and 1b or 1 and 1'.

  Indented Dichotomous key
• Bracketed Dichotomous Key


  What kind of Dichotomous Key?

  
• Indented Dichotomous Key 


  What kind of Dichotomous Key?

  
• Type of Key that is preferred by Zoologist?

  Bracketed Dichotomous KEy
• provides both choices side-by-side. the choices of the couplet must be numbered (lettered)

  Bracketed Key
• It is the process of associating an unknown taxon with known one, or recognizing that the unknown is new to science and warrants formal description and naming.

  Idendtification
• formal naming of taxa according to some standardized system

  Nomenclature
• When a plant name is assigned, it must adhere to specific rules. What code is this?

  International Code of Nomenclature for Algae, Fungi, and Plants
• These formal names are known as __________, which by convention are translated into Latin Language.

  Scientific NAmes
• Arrangement of entities into some type of order

  Classification
• Its purpose is to provide a system for cataloguing and expressing relationship between entities

  Classification
• Give the Taxonomic Rank

  Domain, Kingdom, Division, Class, Order, Family, Genus and Species
• what rank is the taxon magnoliophyta belongs to?

  Division
• What rank is the taxon Liliopsida belongs to?

  Class