vernalization


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vernalization

a process in which young plants are treated with low temperatures (2–5 °C) to induce a change to an older physiological state, thus shortening the interval between sowing and flowering. Vernalization can be reversed by high temperatures.
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One of the FUL loci (called FUL1 by Preston & Kellogg, VRN1 by other authors) controls vernalization response in wheat, barley, and ryegrass (Lolium) (Yan et al., 2003; Yan et al., 2004; Fu et al., 2005; Jensen et al., 2005).
Vernalization is a cold treatment used to make certain plants flower.
"These studies will provide breeders with a tool to select the best vernalization gene combinations for particular regions.
"The genes or proteins that are sensitive to the vernalization treatment are not known yet," explains Mary Williams, assistant professor of biology at Harvey Mudd College in Claremont, California.
Mapping FRI, a locus controlling flowering time and vernalization response in Arabidopsis thaliana.
Germinated seeds of each parent and their 28 F1 hybrids after 50 days of vernalization at zero degreeAdegC were planted in 432 pots (144 pots per water regime site) measuring 25 cm wide by 30 cm deep, containing two parts (by volume) top soil, one part vermiculite and one part sand.
They require a greater period of vernalization than softneck cultivars, so a prolonged period of cool weather is ideal.
Cold acclimation, de-acclimation and re-acclimation of spring canola, winter canola and winter wheat: The role of carbohydrates, cold-induced stress proteins and vernalization. Environ.
For each lot a single pregerminative treatment was applied, consisting of: T1 - friction in coarse sand on a sieve; T2 and T3 immersion in sulfuric acid (98%) for 30 minutes and washing in water, with and without a vernalization for 48 hours in a refrigerator at 4 [degrees]C, respectively; T4 and T5 - natural fermentation for 72 hours, with seeds submitted and not submitted to drying in shade for seven days; and T6 - seeds with intact sarcotesta as control.
Exposure of some plants to cold or low temperatures has been reported to induce epigenetic changes which may lead to changes in flowering time through vernalization [48].
In this sense, at vernalization is a factor that affects strawberry development, which is in accordance COSTA et al.
The vernalization of seedlings is a method that provides plants with artificial climactic conditions for gemma differentiation into flower buds at times when these conditions do not occur naturally, simulating natural vernalization (OLIVEIRA et al., 2006).