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There are a total of 11 record(s) matching your query.
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The August Krogh principle applies to plants
Author(s): Wayne, R.; Staves, M. P.
Abstract: The Krogh principle refers to the use of a large number of animals to study the large number of physiological problems, rather than limiting study to a particular organism for all problems. There may be organisms that are ...
NASA Center: NASA (non Center Specific) Publication Year: 1996
Added to NTRS: 2006-08-02
Document ID: 20040089781
Detection of gravity-induced polarity of cytoplasmic streaming in Chara
Author(s): Staves, M. P.; Wayne, R.; Leopold, A. C.
Abstract: Gravity induces a polarity of cytoplasmic streaming in vertically-oriented internodal cells of characean algae. The motive force that powers cytoplasmic streaming is generated at the ectoplasmic/endoplasmic interface. The ...
NASA Center: NASA (non Center Specific) Publication Year: 1995
Added to NTRS: 2006-08-02
Document ID: 20040089786
A down-to-earth model of gravisensing
Author(s): Wayne, R.; Staves, M. P.
Abstract: The statolith hypothesis for gravity sensing is the most accepted model of gravity sensing in plants. However, the lukewarm acceptance of the statolith hypothesis among plant physiologists is most likely due to inertia and ...
NASA Center: NASA (non Center Specific) Publication Year: 1997
Added to NTRS: 2006-08-02
Document ID: 20040089482
A down to earth model of gravisensing or Newton's Law of Gravitation from the apple's perspective
Author(s): Wayne, R.; Staves, M. P.
Abstract: The physiology of gravity perception in plants is examined and a model of gravitational pressure is explained and compared to the statolith model. The gravitational pressure model is based on studies of tension and ...
NASA Center: NASA (non Center Specific) Publication Year: 1996
Added to NTRS: 2006-08-02
Document ID: 20040089745
Cytochalasin D does not inhibit gravitropism in roots
Author(s): Staves, M. P.; Wayne, R.; Leopold, A. C.
Abstract: It is generally thought that sedimenting plastids are responsible for gravity sensing in higher plants. We directly tested the model generated by the current statolith hypothesis that the gravity sensing that leads to ...
NASA Center: NASA (non Center Specific) Publication Year: 1997
Added to NTRS: 2006-08-02
Document ID: 20040089313
Gravity-dependent polarity of cytoplasmic streaming in Nitellopsis
Author(s): Wayne, R.; Staves, M. P.; Leopold, A. C.
Abstract: The internodal cells of the characean alga Nitellopsis obtusa were chosen to investigate the effect of gravity on cytoplasmic streaming. Horizontal cells exhibit streaming with equal velocities in both directions, whereas ...
NASA Center: NASA (non Center Specific) Publication Year: 1990
Added to NTRS: 2006-08-02
Document ID: 20040089512
The effect of the external medium on the gravitropic curvature of rice (Oryza sativa, Poaceae) roots
Author(s): Staves, M. P.; Wayne, R.; Leopold, A. C.
Abstract: The roots of rice seedlings, growing in artificial pond water, exhibit robust gravitropic curvature when placed perpendicular to the vector of gravity. To determine whether the statolith theory (in which intracellular ...
NASA Center: NASA (non Center Specific) Publication Year: 1997
Added to NTRS: 2006-08-02
Document ID: 20040089314
The density of the cell sap and endoplasm of Nitellopsis and Chara
Author(s): Wayne, R.; Staves, M. P.
Abstract: We measured the densities of the cell sap, endoplasm and cell wall of Nitellopsis obtusa and Chara corallina using interference microscopy, refractometry, immersion refractometry, equilibrium sedimentation and chemical ...
NASA Center: NASA (non Center Specific) Publication Year: 1991
Added to NTRS: 2006-08-02
Document ID: 20040112130
The contribution of the extracellular matrix to gravisensing in characean cells
Author(s): Wayne, R.; Staves, M. P.; Leopold, A. C.
Abstract: The cell-extracellular matrix junction, which includes the cell wall and the outer surface of the plasma membrane, may be an essential region for the perception of gravity by the internodal cells of Chara corallina. ...
NASA Center: NASA (non Center Specific) Publication Year: 1992
Added to NTRS: 2006-08-02
Document ID: 20050000760
Hydrostatic pressure mimics gravitational pressure in characean cells
Author(s): Staves, M. P.; Wayne, R.; Leopold, A. C.
Abstract: Hydrostatic pressure applied to one end of a horizontal Chara cell induces a polarity of cytoplasmic streaming, thus mimicking the effect of gravity. A positive hydrostatic pressure induces a more rapid streaming away from ...
NASA Center: NASA (non Center Specific) Publication Year: 1992
Added to NTRS: 2006-08-02
Document ID: 20040089505
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