Collection of gravitropic effectors from mucilage of electrotropically-stimulated roots of Zea mays L.

W. Mark Fondren, Randy Moore

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We placed agar blocks adjacent to tips of electrotropically stimulated primary roots of Zea mays. Blocks placed adjacent to the anode-side of the roots for 3 h induced significant curvature when subsequently placed asymmetrically on tips of vertically-oriented roots. Curvature was always toward the side of the root onto which the agar block was placed. Agar blocks not contacting roots and blocks placed adjacent to the cathode-side of electrotropically stimulated roots did not induce significant curvature when placed asymmetrically on tips of vertically-oriented roots. Atomic absorption spectrophotometry indicated that blocks adjacent to the anode-side of electrotropically-stimulated roots contained significantly more calcium than (1) blocks not contacting roots, and (2) blocks contacting the cathode-side of roots. These results demonstrate the presence of a gradient of endogenous Ca in mucilage of electrotropically-stimulated roots (i.e. roots undergoing gravitropic-like curvature).

Original languageEnglish (US)
Pages (from-to)657-659
Number of pages3
JournalAnnals of Botany
Volume59
Issue number6
StatePublished - Jun 1 1987

Keywords

  • Corn
  • Electrotropism
  • Mucilage
  • Root gravitropism
  • Zea mays

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