Prohexadione calcium is a new type of plant growth regulator belonging to the cyclohexane carboxylic acid family. It is mainly used to control the growth of cereal crops. It can shorten the length of crop stems, enhance the plant's disease resistance, cold resistance, and stress resistance. It also has obvious lodging resistance to achieve the purpose of increasing yield and improving quality.
Mechanism of action
Prohexadione calcium interferes with the synthesis of gibberellic acid in plants, inhibits the activities of GA19 and GA20, and blocks the synthesis of GA1. At the same time, the activity of GA4 is increased, and the levels of abscisic acid, zeatin and isopentenyl adenosine type cytokinins are increased, thereby inhibiting the upper vegetative growth of plants and promoting plant reproductive growth. And it has good disease resistance.
Characteristics of Prohexadione Calcium
advantage
1. Prohexadione calcium only inhibits the growth of stems and leaves, and has no effect on the growth and development of crop fruits and grains. Plant growth regulators such as paclobutrazol inhibit the synthesis pathways of all gibberellins, including crop fruits and grains.
2. Prohexadione calcium has a short half-life, is easily degraded and metabolized, and has no impact on the next crop. Plant growth regulators such as chlormequat have long half-lives.
3. Prohexadione calcium has various functions. It can not only control plant growth, promote the expansion of roots and tubers, increase fruit setting rate, increase yield, optimize quality, but also enhance the stress and disease resistance of plants and prevent premature plant aging.
shortcoming
1. The price of prohexadienate calcium is relatively expensive. If the amount is too large, the cost will be too high. If the amount is small, the effect of controlling growth will be poor, and it will cause the leaves to turn yellow and affect the photosynthesis of crops.
2. Prohexadione calcium is a plant growth regulator with high activity. When used in crop fields with poor growth and poor soil, it will completely inhibit the growth of crops and lead to crop yield reduction.
market expectation
The discovery of prohexadienate calcium is different from plant growth retardants such as quaternary ammonium salts (chlormequat) and triazoles (paclobutrazol, uniconazole), and creates a new field of late inhibition of gibberellin biosynthesis.
At present, prohexadione calcium has received widespread attention from domestic enterprises. The main reason is that compared with triazole retardants, prohexadione calcium has no residual toxicity to rotation plants and no pollution to the environment, which has strong advantages. In the future, it may replace triazole growth retardants. The green attribute is the biggest feature of prohexadione calcium. Its half-life in the soil does not exceed 24 hours, and it has low toxicity and low residue. This is an unparalleled advantage of other conditioner products.
Calcium prohexadienate can directly regulate photosynthesis of plants and has broad application prospects in almost all crops. At the same time, prohexadione calcium can widely regulate plant hormones such as active gibberellin, ethylene, auxin, salicylic acid, abscisic acid, etc., and has significant disease resistance, insect resistance and stress resistance.
