Hydrotropism in roots: sensing of a gradient in water potential by the root cap

Mamoru Takano, Hideyuki Takahashi, Tadashi Hirasawa, Hiroshi Suge

研究成果: Article査読

50 被引用数 (Scopus)

抄録

Roots of the agravitropic pea (Pisum sativum L.) mutant, ageotropum, responded to a gradient in water potential as small as 0.5 MPa by growing toward the higher water potential. This positive response occurred when a sorbitol-containing agar block was unilaterally applied to the root cap but not when applied to the elongation region. Unilateral application of higher concentrations of sorbitol to the elongation region caused root curvature toward the sorbitol source, presumably because of growth reduction on the water-stressed side. The control blocks of plain agar applied to either the root cap or the elongation region did not cause significant curvature of the roots. These results demonstrate that hydrotropism in roots occurs following perception of a gradient in water potential by the root cap.

本文言語English
ページ(範囲)410-413
ページ数4
ジャーナルPlanta
197
2
DOI
出版ステータスPublished - 1995 9 1

ASJC Scopus subject areas

  • 遺伝学
  • 植物科学

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