Contribution of Botanist in the System of Classification PROF
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COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE Contribution of botanist in the system of classification PROF. NANDITA BHAKAT Assistant professor Department of Botany Narajole Raj College BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist #1. Theophrastus ( 370-287BC) • “Father of Botany” • He classified plant based on the habit , into 4 groups Herbs, Undershrub, Shrubs and Trees. • Described and named 480 plants and published his work in Historia Plantarum. Theophrastus • Important contributions: I. Fundamental difference between Dicotyledons and Monocotyledons. II. Difference between centripetal and centrifugal type of inflorescences. III. Difference between polypetalous and gamopetalous corolla. IV. Difference between superior and inferior ovary. BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist #2: Gaspard Bauhin (1560-1624) • His work frequently referred the plants with a binary nomenclature and made distinction between genus and species. • Botanist #3: Joseph Pitlon de Tournefort (1656-1708) • He placed primary emphasis on the classification of genera, basing his classification entirely upon the structure of flower and fruit. • He provided major step in the development of the Gaspard Bauhin binomial nomenclature- by the use of a single Latin name for genus and two-word Latin name to denote each species. BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist #4: Carolus Linnaeus (1707-1778) • ”Father of Modern Botany” • The significance of flower and fruit structure was first recognized by him. • He emphasized the basic numerical characteristics of sexual parts i.e., stamen and carpels. Thus the the system known as sexual system. • He classified the plant kingdom into 24 classes then order. Linnaeus BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist #5 Michel Adanson (1727-1806) • Grand Father of Numerical Taxonomy • He reject all the artificial system and proposed his classification in favour of natural system. • Published his work in Families de Plantes (1763) • Botanist #6 Augustin P. de Candolle (1778-1841) • Introduce the term Taxonomy( taxis-arrangement, nomos-rules) • He attempt to write a flora for the whole world in “Systematis Naturalis RegniVegetabilis “. BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist # 7 George Bentham (1800-18840 and Joseph Dalton Hooker (1817-1911) • Published Genera plantarum • Classified only seed plant BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist #8 Adolf Englar (1844-1930) and Karl Prantl • Includes the entire plant kingdom • Gymnosperm separated and placed before the Angiosperms • Dicotyledons placed after monocotyledons • The term Natural order replace by family • The term series has been replace by order BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist # 9 John Hutchinson (1884-1972) • Relating to the general habit of plants, • Trees and shrubs are probably more primitive than herbs and trees and shrubs are older than climbers. • Monocot have been derived from Dicots. • Free petal are more primitive than connate petals. • The endospermic seed with small embryo is primitive and the non endospermic seed more recent. • In primitive flowers, there are many stamens. Angiosperm Dicotyledons Monocotyledons Lignosae Herbaceae Calyciferae Corolliferae Glumiflorae BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE • Botanist# 10Takhtajan and Cronquist • The Dicot has been discussed prior to Monocots • The families are small homogenous units made up of closely related genera • The Dicots begin with Magnoliales, which is highly satisfactory as Magnoiliales are universally considered to be the most primitive living Angiosperms BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE TYPES OF CLASSIFICATION A) Artificial system: The system where the organisms are classified into different taxa based on one or a few superficial characteristics only. B) Natural system: The plants are grouped on the basis of common natural characteristics and placed into different taxa like classes, orders , families and genera, etc.This type of system does not consider the evolutionary sequence . C) Phylogenetic system : Here the construction of classification is based on the course of evolution and tries to arrange the plants based on genetic and phylogenetic relationship. BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION. COMPILED AND CIRCULATED BY PROF. NANDITA BHAKAT, ASSISTANT PROFESSOR, DEPARTMENT OF BOTANY, NARAJOLE RAJ COLLEGE THANK YOU BOTANY: SEM-IV, PAPER-C10T: PLANT SYSTEMATICS, UNIT-4: SYSTEMS OF CLASSIFICATION..