Webb1 feb. 2001 · Since the starch‐statolith theory attributes gravitropic sensitivity to the mass of amyloplasts, mutants that are altered in starch content have been used in several studies to test this model. Compared to wild‐type plants, starch‐deficient mutants are not as oriented to the gravity vector, and they respond more slowly to changes in the gravity … WebbAbstract. Root gravitropism is one of the most important processes allowing plant adaptation to the land environment. Auxin plays a central role in mediating root …

[Re-examination of starch-statolith hypothesis, a model for gravity ...

WebbIn most cases, the statoliths are sedimentable starch grains that are abundant in certain cells of the root cap. It has been suggested that the sedimentation of the statoliths at the bottom of the statocytes by the gravity vector force leads to … Webb4 maj 2010 · Plants can reorient their growth direction by sensing organ tilt relative to the direction of gravity. With respect to gravity sensing in gravitropism, the classic starch statolith hypothesis, i.e., that starch-accumulating amyloplast movement along the gravity vector within gravity-sensing cells (statocytes) is the probable trigger of subsequent … san diego high school 65 yearbook photos

Molecular basis underlying rice tiller angle: Current progress and ...

Webbthe hypothesis that plastid starch has a statolith function in gravity perception. In the present study, initial light microscopy using the same mutant showed apparently starch … WebbSedimentation of starch-depleted amyloplasts in the mutant was not detected after 40 min of inversion while in the WT the amyloplasts sedimented at a speed of 6 micrometers h … Webb1 dec. 1978 · In the statocytes of control roots the starch statoliths followed the curvature of the root tip sliding along the cell walls and attaining the rest position as in normally … san diego high school ca