Gravity sensing and signaling.
Gravitropism has attracted much attention from plant biologists. Recent studies have provided molecular evidence supporting two long-surviving hypotheses about the mechanism of gravitropism: the starch-statolith hypothesis and the Cholodney-Went hypothesis. Amyloplast movement along the gravity vector within gravity-sensing cells in the root and shoot is the most likely trigger of subsequent intracellular signaling. Several possible events leading from this signaling to differential auxin distribution within the sensing cells have been suggested recently.
Morita
Miyo Terao
MT
Graduate School of Biological Sciences, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101, Japan. mimorita@bs.naist.jp
Tasaka
Masao
M
D017360:Arabidopsis / Q000254:growth & development* / Q000378:metabolism / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D018522:Gravitropism; D018466:Gravity Sensing; D007210:Indoleacetic Acids / Q000378:metabolism; D018517:Plant Roots / Q000254:growth & development / Q000378:metabolism / Q000502:physiology; D018520:Plant Shoots / Q000254:growth & development / Q000378:metabolism / Q000502:physiology; D015398:Signal Transduction
D029681:Arabidopsis Proteins; D007210:Indoleacetic Acids