What are the secrets of plant growth regulators?

Let's take these five plant hormones as an example. Their characteristics are as follows: first, these plant hormones are endogenous hormones synthesized by plants at different growth and development stages; Secondly, these plant hormones can have a great influence on the growth and development of plants only at a very low concentration; Third, plant hormones are transported from the production site to cells in specific sites to play a role. However, the specific physiological functions of these five hormones have their own characteristics.

Physiological functions of auxin: ① promoting cell elongation and growth; ② Promoting cuttings to take root; (3) making plants grow towards light; ④ Promoting organ formation; ⑤ Maintain the top advantage; ⑥ inducing seedless fruit.

Physiological effects of gibberellin: ① promoting cell elongation and division; ② Promote the robust growth of plant stems and leaves; ③ Breaking dormancy and promoting seed germination; ④ inducing flowering and fruiting; (5) promoting fruit setting and fruit production; ⑥ Control sex and induce female flowers.

Cytokinin: ① promoting cell division and tissue differentiation; ② inhibiting stem cutting and root parenchyma cell elongation; ③ Accelerating the synthesis of protein and delaying aging; ④ Promote the transportation of assimilated substances.

Abscisic acid: ① obviously promote leaf abscission; (2) inducing bud and seed dormancy; ③ inhibiting flower bud formation and flowering; (4) Adjust the air hole to close.

Ethylene: ① petiole-upper reaction; (2) the fruit is ripe; ③ promote shedding and senility; (4) breaking dormancy and promoting germination and rooting; ⑤ control gender; 6. Stimulate blood secretion. However, although five different plant hormones show different physiological functions, they also show similar effects. Each plant hormone has many functions, and it will play a role in the life or a certain growth and development stage of plants. Interestingly, although various hormones coexist in plant tissues, they coordinate and restrict each other to adjust and balance the speed of plant growth and development. For example, when auxin and cytokinin work together, it can promote cell division and elongation; When the concentration of cytokinin is greater than auxin, the formation of buds can be induced; When the concentration of the two is equal, the callus only grows and does not differentiate; On the contrary, when the concentration of auxin is greater than cytokinin, it begins to take root.

Therefore, in application, it needs to be applied according to the different characteristics and concentrations of different kinds of plant hormones, so as to effectively regulate the growth and development of plants.