Growth and graviresponsiveness of primary roots of Zea mays seedlings deficient in abscisic acid and gibberellic acid

Randy Moore, Kevin Dickey

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Moore, R. and Dickey, K. 1985. Growth and graviresponsiveness of primary roots of Zea mays seedlings deficient in abscisic acid and gibberellic acid.-J. exp. Bot. 36: 1793-1798.The objective of this research was to determine if gibberellic acid (GA) and/or abscisic acid (ABA) are necessary for graviresponsiveness by primary roots of Zea mays. To accomplish this objective we measured the growth and graviresponsiveness of primary roots of seedlings in which the synthesis of ABA and GA was inhibited collectively and individually by genetic and chemical means. Roots of seedlings treated with Fluridone (an inhibitor of ABA biosynthesis) and Ancymidol (an inhibitor of GA biosynthesis) were characterized by slower growth rates but not significantly different gravicurvatures as compared to untreated controls. Gravicurvatures of primary roots of d-5 mutants (having undetectable levels of GA) and vp-9 mutants (having undetectable levels of ABA) were not significantly different from those of wild-type seedlings. Roots of seedlings in which the biosynthesis of ABA and GA was collectively inhibited were characterized by gravicurvatures not significantly different from those of controls. These results (1) indicate that drastic reductions in the amount of ABA and GA in Z. mays seedlings do not significantly alter root graviresponsiveness, (2) suggest that neither ABA nor GA is necessary for root gravicurvature, and (3) indicate that root gravicurvature is not necessarily proportional to root elongation.

Original languageEnglish (US)
Pages (from-to)1793-1798
Number of pages6
JournalJournal of experimental botany
Volume36
Issue number11
DOIs
StatePublished - Nov 1 1985

Fingerprint

Zea Mays
Gibberellic Acid
Abscisic Acid
abscisic acid
Seedlings
gibberellic acid
Zea mays
seedling
Roots
Acids
seedlings
acid
Growth
Biosynthesis
biosynthesis
Mutant
Inhibitor
inhibitor
fluridone
mutants

Keywords

  • Abscisic acid
  • Ancymidol
  • Fluridone
  • Gibberellic acid
  • Root gravitropism
  • Zea mays

Cite this

Growth and graviresponsiveness of primary roots of Zea mays seedlings deficient in abscisic acid and gibberellic acid. / Moore, Randy; Dickey, Kevin.

In: Journal of experimental botany, Vol. 36, No. 11, 01.11.1985, p. 1793-1798.

Research output: Contribution to journalArticle

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