title: Effect of diacetyl piquerol on H(+)-ATPase activity of microsomes fromIpomoea purpurea.
abstract: The effect of an allelopathic compound, diacetyl-piquerol on the H(+) -ATPase activity of the microsomal fraction from the radicles of a common weedIpomoea purpurea was studied. The diacetyl-piquerol inhibited the germination and radicle growth fromI. purpurea; the radicle growth was increasingly inhibited (10% to 100%) as piquerol concentrations were raised (10 μM to 1000 μM). The H(+)-ATPase activity was inhibited (48%) by 500 μM diacetyl-piquerol, and this inhibition was higher in plasma membrane ATPase (67.2%) than in tonoplast membrane ATPase (31.4%). Additional studies of the precise physiological mechanisms of interference caused by allelopathic compounds are needed.
authors.affiliation: Instituto de Fisiología Celular, Universidad National Autónoma de Méxco, Apartado Postal 70-600, 04510, México, D.F., Mexico.
authors.forename: R
authors.initials: R
authors.lastname: Cruz Ortega
authors.forename: A L
authors.initials: AL
authors.lastname: Anaya
authors.forename: M
authors.initials: M
authors.lastname: Gavilanes-Ruiz
authors.forename: S
authors.initials: S
authors.lastname: Sanchez Nieto
authors.forename: M
authors.initials: M
authors.lastname: Jimenez Estrada