- P-ISSN 1225-0163
- E-ISSN 2288-8985
The concentration of free PAs in the cells was decreased gradually from <TEX>$500{\mu}mole$</TEX> to <TEX>$290{\mu}mole$</TEX> for PUT, from <TEX>$153{\mu}mole$</TEX> to <TEX>$79{\mu}mole$</TEX> for SPD, from <TEX>$69{\mu}mole$</TEX> to <TEX>$20{\mu}mole$</TEX> for SPM during the ABA treatment within 1 hour, and was slightly changed with the increasing or decreasing between <TEX>$290{\mu}mole{\sim}220{\mu}mole$</TEX> in the constant content level of PUT during the continuously ABA treatment of 2 days in the young cotyledons. The concentration of free PUT was gradually decreased from <TEX>$160{\mu}mole$</TEX> to <TEX>$9{\mu}mole$</TEX> during the ABA treatment within 1 hour like as cotyledons, and decreased from <TEX>$9{\mu}mole$</TEX> to <TEX>$5{\mu}mole$</TEX> during the continuously ABA treatment 2 days in the young hypocotyls. PUT and other PA were existed <TEX>$5{\mu}mole$</TEX> during the continuously ABA treatment of 2 days in the hypocotyls. It showed that during the ABA treatment was decreased all PA concentration in the cells and PAs were not concerned directly to stress, but might regulated physiological change against stress.