2. We know about plant regeneration
Plant propagation is the process of creating new plants
Plant propagation can also refer to the artificial or natural
dispersal of plants.
5. Meristem
Meristematic cells (undifferentiated cells) capable of cellular differentiation.
Meristematic tissue is made up of small cells that have thin walls and large nuclei.
The cells have no vacuoles and intercellular spaces.
It can be induced to reproduce an entire plant.
Shoot apical meristem (SAM)- shoot, leaves and flowers.
Root apical meristem (RAM)- root growth.
Further developed into permanent tissues
Protective tissue, parenchyma tissue,
Sclerenchya tissue, collenchyma tissue,
Xylem tissue and phloem tissue.
Meristem- merizein (greek word ) meaning to divide, in recognition of its inherent
function (1858)
Carl Wilhelm von Nägeli
(1817 – 1891)
How is grow ?
8. It is the techniques
Plants raised under controlled condition
Plants are regenerated from cell, protoplast, tissue, organ (leaf, stem, root, flower
part) etc.,
They were cultured on artificial nutrient medium
Incubated at aseptic condition (pathogenic free / controlled temperature,
photoperiod etc)
Plant tissue culture Explant
Gottlieb Haberlandt (1854-1945)
(Father of Tissue Culture)
10. Inherent capacity of plant
cell to develop into
complete plant
Totipotency
Dedifferentiation:
Mature cell reverting back to
meristamatic state and forming an
undifferentiated mass of cells (callus)
Callus:
Undifferentiated cells, non functional
cells.
Redifferentiation:
The ability of dedifferentiated cell/callus
to form a whole plant.
36. Gene transformation
The first genetically modified crop plant was produced in 1982, an antibiotic-resistant
tobacco plant
The first field trials occurred in France and the USA in 1986, when tobacco plants
were engineered for herbicide resistance
