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Touch and gravitropic set-point angle interact to modulate gravitropic growth in roots
Advances in Space Research, 2003Plant roots must sense and respond to a variety of environmental stimuli as they grow through the soil. Touch and gravity represent two of the mechanical signals that roots must integrate to elicit the appropriate root growth patterns and root system architecture. Obstacles such as rocks will impede the general downwardly directed gravitropic growth of
G D, Massa, S, Gilroy
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Directional Gravity Sensing in Gravitropism
Annual Review of Plant Biology, 2010Plants 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 ...
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Gravitropic Bending and Plant Hormones
2005Gravitropism is a complex multistep process that redirects the growth of roots and various above-ground organs in response to changes in the direction of the gravity vector. The anatomy and morphology of these graviresponding organs indicates a certain spatial separation between the sensing region and the responding one, a situation that strongly ...
Sonia, Philosoph-Hadas +2 more
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Negative gravitropic response of roots directs auxin flow to control root gravitropism
Plant, Cell & Environment, 2019AbstractRoot tip is capable of sensing and adjusting its growth direction in response to gravity, a phenomenon known as root gravitropism. Previously, we have shown that negative gravitropic response of roots (NGR) is essential for the positive gravitropic response of roots.
Liangfa Ge, Rujin Chen
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The Cytoskeleton and Gravitropism in Higher Plants
Journal of Plant Growth Regulation, 2002The cellular and molecular mechanisms underlying the gravitropic response of plants have continued to elude plant biologists despite more than a century of research. Lately there has been increased attention on the role of the cytoskeleton in plant gravitropism, but several controversies and major gaps in our understanding of cytoskeletal involvement ...
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The endodermis and shoot gravitropism
Trends in Plant Science, 1999Shoots and roots of higher plants exhibit negative and positive gravitropism, respectively. A variety of gravitropic mutants have recently been isolated from Arabidopsis, the characterization of which demonstrates that the molecular mechanisms of the gravitropic responses in roots, hypocotyls and inflorescence stems are different.
M, Tasaka, T, Kato, H, Fukaki
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Gravitropism in tip-growing cells
Planta, 1997Unicellular tip-growing cells are excellent experimental systems in which to study gravitropism because cell extension, gravity sensing and the gravity response are all confined to the apical dome. Thus various approaches can be used to determine the distinct steps of the short gravitropic signal-transduction chain, which lacks a signal-transmission ...
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