Gravity perception and gravitropic response of inflorescence stems in Arabidopsis thaliana.
Shoots of higher plants exhibit negative gravitropism. However, little is known about the site of gravity perception in shoots and the molecular mechanisms of shoot gravitropic responses. Our recent analysis using shoot gravitropism 1(sgr1)/scarecrow(scr) and sgr7/short-root (shr) mutants in Arabidopsis thaliana indicated that the endodermis is essential for shoot gravitropism and strongly suggested that the endodermis functions as the gravity-sensing cell layer in dicotyledonous plant shoots. In this paper, we present our recent analysis and model of gravity perception and gravitropic response of inflorescence stems in Arabidopsis thaliana.
Fukaki
H
H
Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Japan.
Tasaka
M
M
D017360:Arabidopsis / Q000166:cytology / Q000235:genetics / Q000254:growth & development*; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D018522:Gravitropism / Q000235:genetics / Q000502:physiology*; D018466:Gravity Sensing / Q000502:physiology*; D009154:Mutation; D019441:Plant Epidermis / Q000166:cytology / Q000235:genetics / Q000254:growth & development; D018520:Plant Shoots / Q000166:cytology* / Q000235:genetics / Q000254:growth & development*