2010), and this effect is more pronounced in chilled seeds (moist stratification at 4[degrees]C) compared to non-chilled seeds, suggesting an interaction of low temperatures with phytochrome
in dormancy alleviation (Taylorson & Hendricks, 1969; Gallagher & Cardina, 1997, 1998a, b; Leon & Owen, 2003).
Such impacts are related to phytochrome
which is a photoreceptor able to sense the radiations at different wave lengths.
This insensitivity to light may be due to the quantity of phytochrome
present in the seeds in the active form being insufficient to induce the germination process (Bewley et al.
Phylogeny of the Celastraceae inferred from 26S nuclear ribosomal DNA, phytochrome
B, rbcL, atpB and morphology.
Furthermore, genetic and molecular studies have advocated that DOF proteins are implicated in the regulation of biological processes exclusive to plants, for instance, light-responsiveness, photoperiodic flowering, tissue differentiation, dormancy, seed germination and maturation, metabolic regulation and nitrogen assimilation and phytochrome
and phytohormone signalling (Gupta et al.
Previous studies have confirmed that the seeds depend on phytochrome
, perceiving the surrounding environment and respond through the optical signal pathway (Dooley et al.
ALA is a precursor in the biosynthesis of phytochromobilin, which is a phytochrome
chromophore, ALA may have an effect on the content of phytochromobilin, such that a phytochrome
pathway might mediate anthocyanin accumulation in fruit treated with ALA during the initial storage.
Phylogeny of the parasitic family Orobanchaceae inferred from phytochrome
Control of mitosis by phytochrome
and a blue-light receptor in fern spores.
New proposal of classification of seeds based on forms of phytochrome
instead of photoblastism.
2008) report that excess moisture can decrease the active form of the phytochrome
which acts directly on the germination of lettuce-seeds (Ojeda et al.
However, higher germination for dark incubated seeds could indicate the biosynthesis of gibberellins (mediated through the phytochrome
system) may have been inhibited by light exposure (Kato-Noguchi, 2002).