Abstract: Hypocotyls from Cucumber and Phaseolus inoculated on Murashige and Skoog(MS)culture medium for 4 days,formed adventitious roots on morphologically lower side.The rooting capacity of each segment derived from three regions of each hypocotyl was different.The rooting speed on the morphologically lower side of segments which were inserted upside down is faster for one day to two days than which were inserted upright in the culture medium.

Key words: Adventitious root formation