Plant Bible

                                                                                  MENDELISM The contribution of Mendel to Genetics is called Mendelism. It includes all concepts brought out by Mendel through his original research, on plant hybridization. Genetic laws proposed by Mendel are universal to most genes in microbes, plants and animals. Mendelian genetic concepts are basics to modern geneticists. Therefore, Mendel is called the Father of Genetics.   Mendel: Mendel is the Father of Genetics. He was born in a peasant family in 1822 in Austria. He worked as a teacher. He passed his later life as an abbot. He died in 1884. Mendel was fond of gardening and fruit-culture from his boy hood. When he was working as teacher, he perform...

                                                    Theories of Meristem Organization and Function Many anatomists illustrated the root and shoot apical meristems on the basis of number and arrangement and accordingly proposed the following theories – An extract of which are discussed below. Shoot Apical Meristem: Apical Cell Theory: Apical cell theory is proposed by Hofmeister (1852) and supported by Nageli (1859). A single apical cell is the structural and functional unit. This apical cell governs the growth and development of whole plant body. It is applicable in Algae, Bryophytes and in some Pteridophytes. Histogen Theory: Histogen theory is proposed by Hanstein (1868) and supported by Strassburgur. The shoot apex comprises three distinct zones. 1. Dermatogen: It is a outermost layer. It gives rise to epidermis. 2...

                      DISCOVERY OF PHYTOHORMONES-AUXIN, GIBBERILIN, CYTOKININ                                                                     AUXIN S.NO SCIENTISTS YEAR OF IDENTIFICATION DISCOVERY 1 Charles Darwin   1880 The unilateral growth and curvature of Canary   grass (Phalaris canariensis) coleoptile to light. 2 F. W. Went 1926 The term auxin (Greek: Auxin – to Grow)   was first used by him .   3 F. W. Went 1928 Avena curvature test – he   using   Oats (Avena) coleo...

                                                   IDENTIFICATION ON PHOTOSYNTHESIS S.NO SCIENTISTS YEAR OF DISCOVERY DISCOVERIES 1 Van Helmont (1648) Increase in organic substances comes from water alone by growing a Willow tree that gains weight but soil loses only 2 ounces of the original weight   2 Stephen Hales   (1727) Father of Plant Physiology, Plants obtain nourishment from air and light 3 Joseph Priestley (1772) Performed experiments with candle, mice and Mint plant and concluded that vegetation purifies the air   4 Jean-Ingen-Housz (1779) Confirmed Priestley’s experiment that oxyge...