Abscisic acid is not necessary for gravitropism in primary roots of Zea mays

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Abstract

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 languageEnglish (US)
Pages (from-to)281-283
Number of pages3
JournalAnnals of Botany
Volume66
Issue number3
DOIs
StatePublished - Sep 1990

Bibliographical note

Funding Information:
This research was supported by a grant from the National Aeronautics and Space Administration.

Keywords

  • Abscisic acid
  • Corn, fluridone
  • Viviparous
  • Zea mays L. cv. Tx5855

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