This ppt explains about the aims and objectives of plant taxonomy

1. Plant Taxonomy
Prepared By-
Dr. Sangeeta Das
Assistant Professor
Department of Botany
Bahona College
Jorhat, Assam, India.

2. Systematics is a wider term comprising
identification of an individual organism, assigning a
proper rank to the same and giving it a name.
However, taxonomy and systematics are considered
by many to denote the same thing and the terms
are treated as synonymous.
Plant taxonomy is the science that deals with
finding, identifying, describing, classifying, and
naming of plants.
Definition

3. To classify the plant Kingdom
To identify the plants, and
To name a plant and fix its rank in a
recognised system of classification.
Aims of Plant Taxonomy

4. Taxonomy aims at fulfilling three main objectives:
1. Firstly, taxonomy aims at classifying organisms into taxa on the
basis of similarities in phenotypic (phenetic) characteristics.
2.The second objective of taxonomy is to assign each taxon a name.
This naming of a taxon is known as nomenclature. Assigning a
name to an organism is necessary for identifying it without
confusion throughout the scientific world. Therefore, nomenclature
needs to be made following certain internationally accepted rules.
3. The third objective of taxonomy is to serve as an instrument for
identification of bacteria. For example, the developments in the
molecular biological techniques, like DNA hybridization, have
made a great impact on the taxonomy of bacteria evolving a new
branch of taxonomy called molecular taxonomy has come into
existence. The determination of homology of ribosomal RNA’s is
another development which has revolutionized bacterial taxonomy.
Objectives of Plant Taxonomy

5. 1. To arrange elements or taxa of plants into a more
systematic manner so that they can be better
understood and could be used easily and more
effectively.
2. To arrange data or information and knowledge about
plants.
3. To indicate the source and genetic relationship
(phylogenetic), ancestry and origin of plants.
4. To indicate the distribution and habitat of plants on
earth and their benefits.
Importance of Plant Taxonomy

6. 1. Classification
Plants are arranged into groups of similar
characteristics. The groups are considered as
categories or taxa and form the taxonomic system.
2. Identification
To identity and derive the name of an organism by
referring to an existing classification.
3. Nomenclature
To provide a scientific name to an organism.
4. Description
To describe the characteristics of a taxon e.g. a family.
Taxonomic Components

8. Kingdom:
The highest level in a classification e.g. animal and
plant kingdom.
Division:
The number of groups in this taxon is not fixed, it
depends on the classification system.
Based on similar characteristics observed on a few
elements or organs
e.g. : dominance of a sporophyte to a gametophyte,
presence of an ovule, seed formation and several
other morphological and anatomical characteristics.
Those are hereditary characteristics and will
continue to exist from generation to generation.

9. Class-
The number of groups in this taxon is also not
fixed, depending on the classification system.
Separation is based on important basic
differences that exist between the groups.
Order:
Separation is based on a more convincing
genetic relationship which earlier had been
detected at the class and division level.

10. Family:
It is based on more characteristics compared to order,
class and division
e.g. the morphological characteristics of reproductive
organs (inflorescence, ovary position, placentation,
number of pistils and carpels, types of ovule and
androecium)
Genus:
Genus involves more similar characteristics including a
closer family relationship but they do not cross. If a
hybrid cross does occur the offsprings are normally
infertile or will not survive.
Phylogenetically, new genus arises and separates from
the same parental origin.

11. THANK YOU