Chemotropic vs Hydrotropic Stimuli for Root Growth Orientation in Microgravity
نویسندگان
چکیده
منابع مشابه
Determinants of orientation in microgravity.
During two parabolic flight campaigns, one with the NASA-KC-135, the second with the ESA Caravelle, human spatial orientation in an altered gravitational environment was studied by measuring the subjective visual vertical (SVV) by means of a luminous line, and by asking the subjects to give a report, with eyes closed, about their orientation to apparent vertical. The inflight data are compared ...
متن کامل[Spatial orientation under microgravity].
On Earth, humans are constantly exposed to the gravity. During head and body tilts, the otolith organs sense changes in head orientation with respect to the gravitational vertical. These graviceptors also transduce transient linear acceleration generated by translational head motion and centripetal acceleration during rotation about a distant axis. When individuals are rotated at a constant vel...
متن کاملCapillary-driven Root Module Design for Microgravity
A capillary-driven root module design for growing plants in microgravity is presented. Matrix-based root modules have been developed for conditions of microgravity which require active pumping or an elaborate control system to operate. The capillary-driven system is passive and relies on root uptake to develop the necessary gradient within the media to operate the liquid control valve. A collap...
متن کاملThe orientation of Listing’s Plane in microgravity
The orientation of Listing's Plane (LP) was examined under one-g and zero-g conditions during parabolic flight. Ten healthy subjects participated in the experiment. In zero-g the orientation of LP was consistently altered. LP elevation was tilted backwards by approx. 10 degrees (p=0.003). The azimuth angles of the left and right eyes also diverged in zero-g, with a statistically significant cha...
متن کاملGrowth cone responses to growth and chemotropic factors.
During nervous system development axons reach their target areas under the influence of numerous guidance cues that affect rate and direction of growth. This report addresses the unsettled question of whether and to what extent growth velocity and turning responses (attraction, repulsion) are interdependent. We exposed individual growth cones of fetal rat dorsal root ganglion neurons in culture...
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ژورنال
عنوان ژورنال: Frontiers in Plant Science
سال: 2019
ISSN: 1664-462X
DOI: 10.3389/fpls.2019.01547