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Calcium-triggered apoplastic ROS bursts balance gravity and mechanical signals to navigate soil
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Control of gravitropic orientation. II. Dual receptor model for gravitropism
Functional Plant Biology, 2004Gravitropism of vascular plants has been assumed to require a single gravity receptor mechanism. However, based on the evidence in Part I of this study, we propose that maize roots require two. The first mechanism is without a directional effect and, by itself, cannot give rise to tropism.
Clifford E, LaMotte, Barbara G, Pickard
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Analysis of Plant Root Gravitropism
2022Gravity is a powerful element in shaping plant development, with gravitropism, the oriented growth response of plant organs to the direction of gravity, leading to each plant's characteristic form both above and below ground. Despite being conceptually simple to follow, monitoring a plant's directional growth responses can become complex as variation ...
Richard, Barker +3 more
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BioEssays, 1995
AbstractWhen a plant root is reoriented within the gravity field, it responds by initiating a curvature which eventually results in vertical growth. Gravity sensing occurs primarily in the root tip. It may involve amyloplast sedimentation in the columella cells of the root cap, or the detection of forces exerted by the mass of the protoplast on ...
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AbstractWhen a plant root is reoriented within the gravity field, it responds by initiating a curvature which eventually results in vertical growth. Gravity sensing occurs primarily in the root tip. It may involve amyloplast sedimentation in the columella cells of the root cap, or the detection of forces exerted by the mass of the protoplast on ...
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Negative gravitropism in plant roots
Nature Plants, 2016Plants 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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Plastids and gravitropic sensing
Planta, 1997Data and theories about the identity of the mass that acts in gravitropic sensing are reviewed. Gravity sensing may have evolved several times in plants and algae in processes such as gravitropism of organs and tip-growing cells, gravimorphism, gravitaxis, and the regulation of cytoplasmic streaming in internodal cells of Chara.
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Assessing Gravitropic Responses in Arabidopsis
2016Arabidopsis thaliana was the first higher organism to have its genome sequenced and is now widely regarded as the model dicot. Like all plants, Arabidopsis develops distinct growth patterns in response to different environmental stimuli. This can be seen in the gravitropic response of roots.
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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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Science Signaling, 2003
Adenosine triphosphate (ATP) is both an energy source when intracellular and a signaling molecule when extracellular. In plants, ATP is normally much more concentrated inside the cells than in the extracellular space. Tang et al. determined that ATP inhibited gravitropism of the roots of Arabidopsis
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Adenosine triphosphate (ATP) is both an energy source when intracellular and a signaling molecule when extracellular. In plants, ATP is normally much more concentrated inside the cells than in the extracellular space. Tang et al. determined that ATP inhibited gravitropism of the roots of Arabidopsis
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