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Auxin, Gibberellins, Cytokinin, Ethylene, Auxin, Cytokinin, Auxin initiate…
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Cytokinin
- Stimulation of cell division
- formation of mitotic spindle apparatus
- ADVENTITIOUS SHOOT FORMATION
- inhibition of embryogenesis
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Ethylene
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Apoptosis of Sclarenchyma, xylem vessel and tracheid
Auxin
- Induction of callus growth
ARF - Auxin response Factor,
AUX/IAA - Inhibitor
Auxin response gene
- Organ culture
Rhizogenesis (Expression of cyclin B1 and cdc2)
- Embryogenesis
Auxin (2,4D) is required initially but not later.
- Auxin promotes elongation and cell enlargement
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Rooting is promoted when
- Auxin is not present
- kept in dark
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