Is the plant growth regulator a legendary "hormone"?

Is the cucumber with flowers used for birth control pills? These rumors of plant growth regulators have been heard by many people. What is the plant growth regulator? Is there any rumor that is so terrible? We are engaged in agriculture. I think we need to have a good understanding of these.

Plant growth regulators, in fact, we only need to remember that it works on plants, not animals and people. Plant growth regulators are actually a pesticide for people who work in agriculture.

[Phytohormone]: The plant itself produces a small amount and is unstable. It is an organic compound that controls the growth and development of plants (germination, flowering, fruiting and defoliation) and metabolism. Currently found are auxins, gibberellins, cytokinins, abscisic acid and ethylene.

[Plant growth regulator]: Most of them are synthetic, and there are natural plant hormones directly extracted from organisms. It can simulate the role of plant hormones and has now obtained pesticide registration. At every step of the plant's growth cycle, such as rooting, germination, growth, flowering, and results, in addition to being controlled by genes, it is also regulated by plant hormones. However, the amount of natural phytohormones synthesized by plants themselves is very small, and it is very difficult and costly to extract phytohormones from plants and then apply them to agricultural production.

In short, plant hormones are produced by plants themselves, and plant growth regulators are artificially extracted natural plant hormones or synthetic plant hormones.

Because it mimics the role of plant hormones, the mechanism by which various plant hormones regulate plant growth and development is still unclear. Therefore, plant growth regulators are used well, can promote growth and development, make crops grow better; poor use, not only can not promote growth, but also cause deformity, growth and development and other issues, just like "poisoning."

The swelling agents, rooting agents, chlormequats, ketamines, flaking agents, ethephon, male-killing agents, growth retardants, etc., which we often see or hear, are all plant growth regulators.

1, swelling agent

At present, the most widely used plant growth regulator in agriculture can promote cell division and elongation, promote fruit hypertrophy, increase yield, etc. The active ingredients are mainly clopidogrel and gibberellic acid. However, it is necessary to pay attention to the period of use, the concentration and the method of use. If the concentration is too high, the nutrition can not keep up with the growth rate, which can cause hollow, deformed, cracked fruit, fallen leaves, fruit falling off, etc., which affects production.

2, rooting agent

Rooting agents can promote plant rooting. Generally, the regulators for rooting are naphthaleneacetic acid (sodium), indole acetic acid, indolebutyric acid (sodium or potassium), naphthyloxyacetic acid, phenolic compounds, and the like. Due to the difference in difficulty and connotation, rooting agents are divided into special rooting agents and broad-spectrum rooting agents.

[Special rooting agent]: It is a tree species that acts on cutting hard-to-root roots, such as Korean pine, larch, hawthorn, and ginkgo.

[Spectral rooting agent]: It is mainly used for seedling, seedling, seedling, and planting of economic crops such as fruit trees, fruits, vegetables, cotton, seedlings, flowers, and medicinal materials to promote rooting.

3, squat

It has the effect of inhibiting cell elongation, preventing lodging, lengthening, strong seedlings, thickening of stems and leaves, promoting root development, and thickening leaves. However, the improper use of the plant is seriously dwarfed, the fruit branches can not be stretched, the leaves are deformed, the chicken claw leaves appear, the axillary buds are clustered, the fruit branches are too short, and the branches and leaves are brittle and easily broken.

4, ketamine

Can significantly inhibit the growth of the secondary shoots and internode elongation, reducing the amount of growth. At the same time, it can increase the fruit setting rate and increase the weight of the ear, especially the sugar content. The test shows that the red purple grape variety can be increased by about 2 degrees. However, the use of ketamine can make the grape fruit smaller, the maturity period is delayed, and the coloring rate is decreased.

5, pull the flower

Pulling flowers, the information found by the main pipe is applied to the grapes, mainly for those varieties with good fruit set, but the ears grow tightly or shortly, and can be treated with a pull flower to grow the whole inflorescence of the ear.

6, ethephon

Ethephon is a ripening agent that enhances the ability of ribonucleic acid (RNA) synthesis in cells and promotes protein synthesis. Ethephon enhances the activity of the enzyme and activates phosphatase and other enzymes involved in fruit ripening when the fruit is ripe to promote fruit ripening. Excessive use of ethylene or improper use of time can cause phytotoxicity, causing yellowing or shedding of leaves or young fruits.

7, killing agent

The maleicide can make the male flower pollen sterile, but it does not affect the growth and development of the female flower. It is mainly used in scientific research and breeding work, and is very important for emasculation. For example, in rice cross breeding, since rice is monoecious, manual operation is very troublesome if the purity of the foreign pollen is to be ensured.

8. Growth retardant

A compound which inhibits the rate of division, elongation and growth of proximal apical meristem cells of a plant stem. Plant growth retardants are derived from chemical synthesis. Commonly used are paclobutrazol, chlormequat, and ketamine. They have been widely used in agricultural production for dwarf plants, lodging resistance, increasing crop yield, promoting tillering of cereal crops, and enhancing crop resistance. Sickness and so on.

Monobenzone

Monobenzone can decompose melanin in the skin, and prevent the formation of melanin in the skin, used for the treatment of hyperpigmentation, such as various spots, age spots, melanoma. In addition as intermediates in organic synthesis.

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Function:

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