Primary roots of Zea mays L. cv. Tx 5855 treated with fluridone are strongly graviresponsive, but have undetectable levels of abscisic acid (ABA). Primary roots of the carotenoid-deficient w-3, up-5, and up-7 mutants of Z. mays are also graviresponsive despite having undetectable amounts of ABA. Graviresponsive roots of untreated and wild-type seedlings contain 286 to 317 ng ABA g-1f. wt, respectively. These results indicate that ABA is not necessary for root gravicurvature.
|Original language||English (US)|
|Number of pages||3|
|Journal||Annals of Botany|
|State||Published - Sep 1990|
Bibliographical noteFunding Information:
This research was supported by a grant from the National Aeronautics and Space Administration.
- Abscisic acid
- Corn, fluridone
- Zea mays L. cv. Tx5855