Ethylene modulates stem cell division in the Arabidopsis thaliana root.
The construction of multicellular organisms depends on stem cells-cells that can both regenerate and produce daughter cells that undergo differentiation. Here, we show that the gaseous messenger ethylene modulates cell division in the cells of the quiescent center, which act as a source of stem cells in the seedling root. The cells formed through these ethylene-induced divisions express quiescent center-specific genes and can repress differentiation of surrounding initial cells, showing that quiescence is not required for these cells to signal to adjacent stem cells. We propose that ethylene is part of a signaling pathway that modulates cell division in the quiescent center in the stem cell niche during the postembryonic development of the root system.
Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, UK.
Olga
O
Ortega-Martínez
Monica
M
Pernas
Rachel J
RJ
Carol
Liam
L
Dolan
D000598:Amino Acids, Cyclic / Q000378:metabolism / Q000494:pharmacology; D017360:Arabidopsis / Q000166:cytology* / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D002454:Cell Differentiation; D002455:Cell Division; D005030:Ethylenes / Q000096:biosynthesis / Q000378:metabolism*; D015870:Gene Expression; D017343:Genes, Plant; D005998:Glycine / Q000031:analogs & derivatives / Q000494:pharmacology; D007210:Indoleacetic Acids / Q000378:metabolism; D009154:Mutation; D009280:Naphthaleneacetic Acids / Q000494:pharmacology; D018517:Plant Roots / Q000166:cytology* / Q000254:growth & development / Q000378:metabolism; D011494:Protein Kinases / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction; D013234:Stem Cells / Q000166:cytology*
D000598:Amino Acids, Cyclic; D029681:Arabidopsis Proteins; C485242:ETO1 protein, Arabidopsis; D005030:Ethylenes; D007210:Indoleacetic Acids; D009280:Naphthaleneacetic Acids; C100978:SCR protein, Arabidopsis; C023863:1-aminocyclopropane-1-carboxylic acid; C036216:ethylene; D011494:Protein Kinases; C477753:CTR1 protein, Arabidopsis; C088137:aminoethoxyvinylglycine; D005998:Glycine