. . "Acids." . . "Growth." . . "Elongation." . . "PH factor." . . "Gravitational effects." . . "Corn." . . "Comparative effects of auxin and abscisic acid on growth, hydrogen ion efflux and gravitropism in primary roots of maize"@en . . . . . . . . . . . . . . . . . . "Comparative effects of auxin and abscisic acid on growth, hdrogen ion efflux, and gravitropism in primary roots of maize" . . . . . . . . . . . "Indoles." . . "Hormones." . . "Hydrogen ions." . . "Plant roots." . . "Gravitropism." . . "Cells (Biology)" . .