Regulation of growth of plants by means of chemicals. Synthetic ingibitory growth

you are: Regulation of growth of plants by means of chemicals

Now natural ingibitor abstsizovaja acid has not found any practical application because of its high cost. However various synthetic ingibitory growth are intensively used at storage of a crop and in gardening. The first synthetic ingibitorom the growth, received wide application, was gidrazid maleinovoj acids which interferes with germination in a storage time of onions of a potato and some other root crops (fig. 14.27), and also to formation of lateral runaways at plants of tobacco with the cut off top.

Variety accessible rostovyh retardantov can carry out now in essence similar problems. The most suitable retardant steals up in each concrete; a case depending on a kind of a plant and desirable effect. The majority retardantov ingibiruet synthesis gibberellina In plants that leads karlikovosti. Besides, retardanty counteract any effects made gibberellinom. To such ingibitoram concern ' SSS ', ' Alar ' (or ' Б9 '), ' АМО-1618 ', ' Antsimidol ' and ' Fosfon '. They are applied to following purposes:

1. Prevention of drowning of wheat. At high level of fertility of soil in the conditions of a damp climate, such as in the Western Europe, wheat directly ahead of cleaning often bends down to the earth under weight of ears and then it cannot be cleaned mechanically. Entering into soil ingibitora SSS leads to formation of a short strong stalk that prevents drowning of plants.

2. Reduction of height of ornamental plants, such, as puansettija, chrysanthemums and lilies. From the commercial point of view the optimum height of blossoming ornamental plants should make about 30-45 sm whereas usually their height reaches 1 m and more. Processing retardantami leaves of young plants or entering of these substances into soil does not render influence on the sizes tsvetkov, but strongly shortens stalks.

3. Regulation of growth of bushes. It is especially important, when bushes grow along roads (even if they are grown up for the decorative purposes) or under high-voltage lines. At spraying of plants after blooming of kidneys, but to a stretching of stalks the number of leaves does not decrease, whereas stalks are shortened and thus necessity in frequent a scrap disappears.

4. Specific influence on quality of fruits or their maturing. It has been revealed that retardanty make variety of the diversified effects. One of such examples - influence retardanta ' Alar ' on fruits of tree species.

It accelerates maturing of berries of a cherry and development of their colouring. Berries become more dense that facilitates their cleaning.

From told above it should be clear that researches on physiology of plants have led to opening of many phenomena which have been used in gardening for creation of more effective and economically more favourable receptions of increase of productivity of grades or improvement of their quality. considering that speed from which the new scientific data lays a way to agriculture practice, we have the right to expect that the following will be some decades witnesses of the further surprising transformations in ways of cultivation by the person of cultural plants. It will be fertile time for experimental botany.