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Kinetin was the first cytokinin hormone recognized for its growth promoting effects on plants.
.Just recently kinentin was found in plants. Cytokinins are essential for cell division and growth. They are important for sink strength --- the capacity of an organ, e.g., flowers, fruit, leaves to import the materials (building blocks) necessary for growth.
increased in plant tissues and organs in response to stress (lack of water, high temperature, low temperature, salinity), cytokinins can help to mitigate the effects of stress on plants to improve productivity under stressful conditions and to improve recovery from stress.
and cytokinins increased the number of flowers per plant, number of fruit per plant and the size of individual fruit. Thus, total yield was increased. There were no negative effects on fruit quality.
Kinetin is a synthetic cytokinin class plant growth regulating phytohormone, altough it has been shown to exist naturally in the DNA of cells