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Provides an insight into current advances in the development of
somatic embryogenesis, as well as the cellular and molecular
mechanism, differential gene expression, and extracellular protein
markers during different developing stages of somatic
embryogenesis. It cover somatic embryogenesis in dicotyledons and
monocotyledons plants, different factors regulating somatic
embryogenesis (plant genotype, level of sugar in the medium, type
and concentration of growth regulators, photoperiod, gelling
agents, time exposure, induction and maturation medium),
application of complex organic additives (often involves fruit
juices, pulp, extracts and homogenates as well as liquid
endosperms, protein hydrolysates like casein hydrolysate, tryptone,
and yeast lysate like yeast extract), genetic fidelity of somatic
embryos derived plantlets and role of connecting stress leading in
expression of transcription factor that appears to connect stress
and developmental signalling pathways and is essential for the
subsequent signal transduction cascade that leads to the formation
of somatic embryos. Expression of different genes associated with
the accumulation of storage reserve during somatic embryogenesis
along with isolation and molecular characterization of miRNAs at
different developmental stages of embryogenesis, and finally
proteomics during somatic embryogenesis has been discussed in
detail.
Vincristine and vinblastine are two important anticancerous
alkaloids present in Catharanthus roseus. Isolation of these
compounds from in vivo grown plants is impeded by low productivity,
is therefore very expensive. Biotechnological methodologies have
recently been employed in improving the yield. In this monograph,
somatic embryogenesis - an important biotechnology based technique
has been described as to enrich alkaloid levels in C. roseus.
Biomass production by optimizing embryo proliferation, maturation
and large scale plantlets development has been discussed. The
influence of cultural conditions and other controlling factor's
role has been evaluated. The monograph discusses the applications
of overproducing mutant cell lines after successful in vitro
mutagenesis. The augmentation possibility of cell biomass by
employing large scale fermenter/ bioreactor has also been suggested
for commercial applications. The established protocol may offer an
ideal opportunity in developing Catharanthus transgenics enmasse.
Discusses pivotal role of somatic embryogenesis in
micropropagation, advantages of somatic embryogenesis over
organogenesis, effect of external and internal factors associated
with the embryogenic cell growth and developmental process, embryo
encapsulation and in vitro selection; somatic embryogenesis in
ornamentals, fruit yielding and medicinally valuable plants,
production of phytochemicals by embryogenic cultures;
histomorphological studies of embryogenic callus to identify
different stages of somatic embryos and Agrobacterium-mediated
genetic transformation and plantlet regeneration via somatic
embryogenesis in food, fruit, fibre and medicinally important
plants.
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