Effect of triazinone on root growth and gravireaction

The effects of a synthetic growth promoter, 4-ethoxy-l-(p-tolyl)-S-triazine-2,6 (1H, 3H)-dione [TA], on growth and gravireaction of Zea mays L. (cv. LG 11) roots were investigated. In horizontal, intact roots, pretreatment with TA at 4 × 10−4M inhibited the gravireaction. If the pretreated roots were rinsed with a buffer solution before incubation, the TA effect was reduced, indicating that a continuous presence of TA was necessary for its maximal activity. On the other hand, the TA pretreatment (1×10−5, 1×10−4 and 4 × 10−4M) promoted the elongation of these roots. The TA effect was stronger for illuminated roots than for those kept in darkness. TA also decreased the lateral curvature of half-decapitated roots maintained vertically in light. This indicates that the action of TA could be associated with some growth inhibiting substances produced or released in cap cells.

[1]  P. Pilet,et al.  Abscisic acid distribution in horizontal maize root segments , 1981, Planta.

[2]  N. Takahashi,et al.  Synergistic Effect of Isourea and Triazinone Derivatives on Activity of Various Gibberellins , 1981 .

[3]  P. Pilet,et al.  Effect of abscisic acid on maize root gravireaction , 1981 .

[4]  P. Pilet.  Some aspects of the control of root growth and georeaction: the involvement of indoleacetic Acid and abscisic Acid. , 1981, Plant physiology.

[5]  P. Barlow,et al.  Root geotropism and the role of growth regulators from the cap: a re‐examination , 1981 .

[6]  P. Pilet,et al.  Importance of the caryopsis in root growth and georeaction , 1980 .

[7]  H. Kitamura,et al.  Promotion of mesocotyl growth in etiolated rice seedlings by 4-ethoxy-1-(p-tolyl)-s-triazine-2,6(1H,3H)-dione , 1980, Planta.

[8]  T. Matsui,et al.  Isourea and triazinone derivatives as related to their ability to stimulate rice seedling growth , 1977 .

[9]  M. Ogawa,et al.  Effects of illumination on absorption peak shifts in spectra of intact etiolated cotyledons of Pharbitis nil I. Existence of two kinds of shift patterns , 1977 .

[10]  P. Pilet,et al.  Root cell georeaction and growth inhibition , 1974 .

[11]  P. Pilet.  Growth inhibitor from the root cap of Zea mays , 1973, Planta.

[12]  M. Wilkins,et al.  The source and lateral transport of growth inhibitors in geotropically stimulated roots of Zea mays and Pisum sativum , 1973, Planta.

[13]  M. Wilkins,et al.  Growth Inhibitor Production by Root Caps in relation to Geotropic Responses , 1970, Nature.

[14]  H. Konings.  ON THE INDOLEACETIC ACID CONVERTING ENZYME OF PEA ROOTS AND ITS RELATION TO GEOTROPISM, STRAIGHT GROWTH AND CELL WALL PROPERTIES , 1964 .

[15]  R. L. Wain,et al.  Abscisic acid and the response of the roots of Zea mays L. seedlings to gravity , 2004, Planta.

[16]  P. Pilet.  Kinetics of the light-induced georeactivity of maize roots , 2004, Planta.

[17]  P. Pilet,et al.  Abscisic acid as a root growth inhibitor: Physiological analyses , 2004, Planta.

[18]  P. Pilet.  Effects of gravity on the growth inhibitors of geo-stimulated roots of Zea mays L. , 2004, Planta.

[19]  R. Beffa,et al.  Elongation and gravireaction of intact and segmented roots: light effects , 1982 .

[20]  T. Matsui,et al.  Synergistic interaction of gibberellic acid and triazinone derivatives in the promotion of rice shoot growth , 1978 .

[21]  P. Pilet.  Growth Inhibitors in Growing and Geostimulated Maize Roots , 1977 .