vernalization
vernalization The treatment of germinating seeds with low temperatures to induce flowering at a particular preferred time. For example, winter varieties of wheat can be sown in the spring and then be exposed to a temperature just above 0°C for a few weeks. The result of this is that they behave like spring varieties and flower in the same year (otherwise they would continue to grow vegetatively and would not flower until the following year). The stimulus is perceived by the apical meristem (either in the embryo or as an apical bud), and some plant hormones such as gibberellin can be used to achieve the same effect. Compare STRATIFICATION.
vernalization
vernalization The promotion of flowering by exposure of a plant to low temperatures. For example, winter cereals will not flower unless subjected to a period of chilling early in their development. Winter cereals are therefore sown in the autumn for flowering the following year. However, if germinating seeds are artificially vernalized they can be sown in the spring for flowering the same year. Biennial plants, such as carrot (Daucus carota), will remain in their nonflowering rosette form until subjected to cold treatment. For vernalization to be effective, the plant tissue must be actively metabolizing and supplied with carbohydrate (i.e. energy) and oxygen. In biennials, perception of the cold stimulus is confined to the shoot apex, and cold treatment of other parts of the plant is ineffective. Some studies have suggested that plant growth substances, including gibberellins and a hypothetical substance called ‘vernalin’, might be involved in the vernalization mechanism, but no conclusive picture has so far emerged.
vernalization
vernalization The treatment of germinating seeds with low temperatures to induce flowering at a particular preferred time. For example, winter varieties of wheat can be sown in the spring and then be exposed to a temperature just above 0°C for a few weeks. The result of this is that they behave like spring varieties and flower in the same year (otherwise they would continue to grow vegetatively and would not flower until the following year). The stimulus is perceived by the apical meristem (either in the embryo or as an apical bud), and some plant hormones such as gibberellin can be used to achieve the same effect. Compare stratification.
More From encyclopedia.com
Flower , Flower
A flower is the reproductive structure of an Angiosperm plant. Flowers have ovaries with ovules that develop into fruits with seeds . There ar… Unisexual Flower , unisexual flower A flower that possesses either stamens or carpels but not both. A plant may be unisexual (dioecious), possessing only male flowers o… Inflorescence , An inflorescence is a collection of flowers in a particular branching pattern that does not contain full-size leaves among the flowers. While there a… Flower Remedies , Definition
Flower remedies are specially prepared flower essences, containing the healing energy of plants. They are prescribed according to a patien… Begonia , Begonias (genus Begonia) are attractive perennial herbs with soft, succulent stems, and white, pink, red, orange, or yellow flowers. Begonias are mem… Pasqueflower , pasque-flower species of anemone. XVI. orig. passeflower — F. passe-fleur, f. passer PASS2 + fleur FLOWER; alt. to pasque-flower (XVI) after pasque E…
About this article
Vernalization
All Sources -
You Might Also Like
NEARBY TERMS
Vernalization