Epinephrine releases the inhibition of flowering
Epinephrine (Epi) is a catecholamine secreted by the adrenal medulla
which could cause the heart to contract, constricting the blood vessels
in the heart, liver, muscles, bones and skin. Abundant evidence
indicates that epinephrine modulates memory consolidation in animals
(Cahill, & Alkire, 2013). Simultaneously, Epi, which is known to
increase cAMP levels in animals is acknowledged for intracellular signal
transduction (Hines et al., 2003).
Similarly, in plants, cAMP takes charge of flowering. It is also
associated with epinephrine directly and indirectly. The previous
research about inhibition of flowering offer broad views that conducted
by Epi, inhibition of flowering Lemna paucicostata in blue light
or in short days is partially overcome by increased cAMP and
Ca2+ (Ives, & Posner, 1982). Furthermore, in leaves
cultures, Epi at 10-100 μM can stimulate somatic embryogenesis from
orchardgrass (Kuklin, & Conger, 1995). Additionally, previous studies
suggested that Epi regulates plant physiology by affecting plant hormone
levels, such as stimulating ethylene biosynthesis in suspension cultures
(Kuklin, & Conger, 1995). However, knowledge about the function and
regulation of epinephrine in plants is still limited.