Natural cytokinins include:Kinetin (KT):Isolated from herring sperm cells in 1955, it was the first naturally discovered cytokinin.
Zeatin (ZT): Isolated from immature maize seeds, it stimulates cell division, promotes chlorophyll formation, accelerates metabolism, and protein synthesis.Dihydrozein (DHZ):Similar to zein, it is also a natural cytokinin.

Plant hormones and plant growth regulators precisely regulate crop growth, development, and stress resistance processes in modern agricultural production. Simultaneously, complex synergistic and antagonistic relationships exist between plant hormones and plant growth regulators, jointly regulating the entire plant life cycle.

For cucurbit crops like cucumbers and melons, applying Ethephon during the seedling stage can increase the number of female flowers, thereby promoting more fruit production and increasing yield.

The effects of temperature difference on plant growth are dual: A moderate diurnal temperature range (typically 8-10°C) promotes plant growth and improves quality; however, excessive temperature differences or extreme changes can inhibit growth or even cause damage.