Mutation by Dr.U.Srinivas, Professor and Head, Srinivas college of pharmacy, Mangalore
By Dr.U.Srinivasa, M.Pharm, Ph.D
MUTATION IN PLANTS
In molecular biology and genetics, mutations are
changes in a genomic sequence: the DNA
sequence of a cell's genome or the DNA or RNA
sequence of a virus. These random sequences can
be defined as sudden and spontaneous changes in
Mutations are caused by radiation, viruses, and
mutagenic chemicals, as well as errors that occur
during meiosis or DNA replication.
They can also be induced by the organism itself,
by cellular processes such as hypermutation.
On exposure to certain chemical, physical or
physiological agents (mutagens)
The different form of gene produced by mutation
are called alleles. A cell or organism which
shows effect of mutation is called mutant.
They are mainly of three types:
- Gene mutation
EFFECTS OF MUTATION
Mutation cause changes in chemical
composition in medicinal plants apart from
morphological and anatomical changes.
On secondary metabolites:
Solasodine content in solanum khasianum
was increased by both radiation & chemical
Morphine content in opium was increased
by chemical mutagens.
Diosgenin content as well as tuber yield in
dioscrea was reduced by radiation
Irradiation of poppy seeds with 14
number of mutation was produced.