Results 171 to 180 of about 4,077 (215)

Calcium in gravitropism. A re-examination

Planta, 1997
For more than a decade it has been assumed that there is a strong relationship between Ca2+ and gravitropism. There is evidence to suggest that the movement of Ca2+ in the wall might regulate extension growth and that free intracellular Ca2+ might mediate signalling in statocytes.
W, Sinclair, A J, Trewavas
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Negative gravitropism in plant roots

Nature Plants, 2016
Plants are capable of orienting their root growth towards gravity in a process termed gravitropism, which is necessary for roots to grow into soil, for water and nutrient acquisition and to anchor plants. Here we show that root gravitropism depends on the novel protein, NEGATIVE GRAVITROPIC RESPONSE OF ROOTS (NGR).
Liangfa Ge, Rujin Chen
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Microinjection - a tool to study gravitropism

Advances in Space Research, 2003
Despite extensive studies on plant gravitropism this phenomenon is still poorly understood. The separation of gravity sensing, signal transduction and response is a common concept but especially the mechanism of gravisensing remains unclear. This paper focuses on microinjection as powerful tool to investigate gravisensing in plants.
P, Scherp, K H, Hasenstein
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Touch and gravitropic set-point angle interact to modulate gravitropic growth in roots

Advances in Space Research, 2003
Plant 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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Evaluation of Gravitropism in Non-seed Plants

2021
Tropisms are among the most important growth responses for plant adaptation to the surrounding environment. One of the most common tropisms is root gravitropism. Root gravitropism enables the plant to anchor securely to the soil enabling the absorption of water and nutrients.
Zhang, Yuzhou, Li, Lanxin, Friml, Jiří
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Directional Gravity Sensing in Gravitropism

Annual Review of Plant Biology, 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 ...
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Gravitropic Bending and Plant Hormones

2005
Gravitropism 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, Haya, Friedman, Shimon, Meir   +2 more
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The Cytoskeleton and Gravitropism in Higher Plants

Journal of Plant Growth Regulation, 2002
The 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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Negative gravitropic response of roots directs auxin flow to control root gravitropism

Plant, Cell & Environment, 2019
AbstractRoot 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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Gravitropism in tip-growing cells

Planta, 1997
Unicellular 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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