Abstract

Phytohormones are necessary for proper manifestation of organs in plant throughout the life cyle. Natural auxin and cytokinin are known to be endo-synthesized in apical meristem and leaf respectively and translocated in the plant portions also to the point site of action. But, the amount available is dependent on the environmental factors including light and temperature. However, synthetic auxin and cytokinin like compounds are now available and marketed appreciably to mitigate the need by external use to maintain the actual requirement and interaction. Beneficial effect of supplementing synthetic plant growth regulators had been gathered from researches are numerous.

Auxins and Cytokinin like natural and synthetic compounds are synthesized from mainly from Tryptophan type aromatic acids and Terpeneoids respectively. From Gene Regulatory Networks and others it reveals that auxins acts through AUX/IAA family and ABC1 family genes. Cytokinin/Kinetins manifested through IPT-SARK genes.