Thermotropismus

Plant thermotropism: an underexplored thermal engagement and avoidance strategy

“…The results appeared to be species dependent, and both positive and negative responses were noted, whereas others failed to detect thermotropic responses altogether, possibly due to issues with the experimental set-ups (Hooker, 1914). For a historical overview of the early years of thermotropic research, we refer the reader to Aletsee (1962). Wortmann (1885) and Burwash (1907), and later others (Onderdonk and Ketcheson, 1973), observed that temperature affects the direction of root growth of maize, but it took until the early 1990s before the first solid evidence from wellcontrolled experiments indicated that maize roots indeed respond to thermogradients perpendicular to the root axis Poff, 1990, 1991), which we were able to confirm (Fig.…”

Imaging of Cerebrospinal Fluid Leaks*

“…In blunt trauma of the face and skull, potential sites for a CSF leak are the posterior wall of the frontal sinus, the ethmoid roof including the olfactory fossa and cribriform plate, the planum sphenoidale and the posterior wall of the sphenoid sinus, and the sella turcica. The ethmoid roof and frontal sinus walls are affected most frequently (either of them comprising 70-80% of anterior skull base fractures), with the cribriform plate and sphenoid sinus ranking third and fourth (30-40%) [24]. Fracture lines must not be confused with sutures or foramina (e.g., anterior and posterior ethmoid foramina, cribriform plate, sphenoocipital synchondrosis, sphenoethmoidal suture).…”

Characterization of thermotropism in primary roots of maize: Dependence on temperature and temperature gradient, and interaction with gravitropism

“…The bulk of this earlier work on thermotropism was reviewed by Aletsee (1962) who concluded that more work was needed for a thorough interpretation of the phenomenon. Since then, research on the influence of temperature on root physiology has focused mainly on the general functions of roots (elongation, branching, nutrient uptake, biomass accumulation) under isothermal conditions, and the physiological processes related to temporal changes in temperature (Cooper 1973;Stone and Taylor 1983 ;Mackay and Barber 1984;Pahlavanian and Silk 1988;Minorsky 1989).…”