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Graviresponse and the localization of its initiating cells in roots of Phleum pratense L. by Hanna E. Zieschang; Andreas Sievers is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Graviresponse and the localization of its initiating cells in roots of Phleum pratense L. about?

Roots of Phleum pratense L. were photographed during both vertical growth and gravitropic bending, and positions of anticlinal rhizodermal cell walls were digitized on the physically upper and lower flanks of the root in the curvature plane. By using B-splines, arc lengths of these positions, i.e. distances along the root surface, values of curvature, and relative elemental rates of elongation were estimated. The whole graviresponse can be divided into phases according to growth-rate values: (i) an increase of rates on the upper side of the root and a decrease on the lower side during the first 1-1 1/2 h after the root has been moved from the vertical to a horizontal position, (ii) a transient equality of the rates on both sides, (iii) 2-3 h after the beginning of graviresponse, the growth gradient is inverted, and (iv) finally, after about 4 h, the growth rates of both flanks are approximately equal again. Curvature begins 15-20 min after horizontal placement of the root. During the first 2 h of graviresponse, plots of curvature versus arc length show one maximum value. After 2-2 1/2 h, two maximum values can be observed, the apical one near the root tip always keeping the same di

Who reads Graviresponse and the localization of its initiating cells in roots of Phleum pratense L.?

Author

Hanna E. Zieschang; Andreas Sievers

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0032-0935)

Published

1991

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)