What types of plant growth regulators are there? Understanding the classification in one article
In crop cultivation and production, appropriately spraying some plant growth regulators has effects on their growth and development in many aspects. And I believe friends with planting management experience are no strangers to plant growth regulators, and may even often use products such as gibberellin and auxin. So what types of plant growth regulators are there? Let's learn about them together.
1. Plant growth promoters
Compounds that can promote plant cell division, differentiation and elongation growth all belong to growth promoters. They can promote the growth of plant vegetative organs and the development of reproductive organs. This is the category of plant growth regulators with the most types and the widest application.
Representative products: gibberellin, naphthaleneacetic acid, 2,4-D, ethephon, sodium nitrophenolate, etc.
2. Plant growth inhibitors
Plant growth inhibitors mainly inhibit the synthesis of auxin, can inhibit the biosynthesis of nucleic acids and proteins in the cells of the stem apical meristem, slow down cell division, and make plants short.
Representative products: abscisic acid, cinnamic acid, coumarin, triiodobenzoic acid, etc.
3. Plant growth retardants
Plant growth retardants mainly inhibit the biosynthesis of gibberellin, inhibit the growth of plant subapical meristems, slow down cell elongation, shorten internodes without reducing the number of cells and internodes, and make plants shorter. But they do not affect the formation of leaves and flowers.
Representative products: chlormequat, paclobutrazol, uniconazole , daminozide, etc.
4. Preservatives
The role of plant preservatives is mainly to inhibit the respiration and metabolism of fruits and vegetables, reduce enzyme activity, control the expansion of latent diseases and the growth, reproduction and accumulation of toxic substances of spoilage bacteria, and keep fruits and vegetables fresh in quality. They mainly maintain the freshness of fruits, vegetables and flowers from physiological and pathological aspects, and extend storage time.
Representative products: thiabendazole, iprodione, imazalil, carbendazim, thiophanate-methyl, etc.
5. Drought resistance agents
Drought resistance agents are chemical substances produced by chemical means to inhibit soil moisture evaporation, promote crop root water absorption, or reduce transpiration intensity.
Representative products: At present, drought resistance chemical preparations used for research and production mainly include 3 types: chemical mulching agents, water-retaining agents and antitranspirants.
6. Male sterilants
Male sterilants are mainly used in agricultural hybrid breeding production, and are agents used to remove the stamens of the female parent. In production practice, male sterility is mostly used for hybrid breeding. However, there are not many varieties with male sterility, which limits the scope of hybrid breeding. In addition, the method of artificial emasculation is very troublesome, and its reliability is also poor. The birth of male sterilants has found an effective way for hybrid breeding, and has been valued by breeding workers.
Representative products: sulfamic acid types, halogenated fatty acids, tribenuron-related compounds, male sterilization triazines, male sterilization pyridines, sulfamic acid, etc.
With the development of agricultural technology, the types of plant growth regulators also advance with the times, and their performance has made obvious progress compared with the past. However, as there are more and more types, many farmer friends are always prone to being cheated when choosing, so they should pay attention to some selection techniques and choose suitable agents according to actual needs.
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