Results 131 to 140 of about 3,094 (181)

Root gravitropism

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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Plastids and gravitropic sensing

Planta, 1997
Data 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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Gravitropic responses of the Avena coleoptile in space and on clinostats.I. Gravitropic response thresholds

Physiologia Plantarum, 1995
We conducted a series of gravitropic experiments on Avena coleoptiles in the weightlessness environment of Spacelab. The purpose was to test the threshold stimulus, reciprocity rule and autotropic reactions to a range of g‐force stimulations of different intensities and durations The tests avoided the potentially complicating effects of earth's gravity
A H, Brown, D K, Chapman, A, Johnsson, D, Heathcote   +3 more
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Analysis of Plant Root Gravitropism

2022
Gravity 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, Sarah, Johns, Ralph, Trane, Simon, Gilroy   +3 more
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Gravitropism and mechanical signaling in plants

American Journal of Botany, 2013
Mechanical stress is a critical signal affecting morphogenesis and growth and is caused by a large variety of environmental stimuli such as touch, wind, and gravity in addition to endogenous forces generated by growth. On the basis of studies dating from the early 19th century, the plant mechanical sensors and response components related to gravity can
Masatsugu, Toyota, Simon, Gilroy
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Assessing Gravitropic Responses in Arabidopsis

2016
Arabidopsis 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.
Richard, Barker, Benjamin, Cox, Logan, Silber, Arash, Sangari, Amir, Assadi, Patrick, Masson   +5 more
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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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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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