Plant development. Genetic control of distal stem cell fate within root and embryonic meristems.
| Autor: | Crawford BC; Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA., Sewell J; Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA 90095, USA., Golembeski G; Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA., Roshan C; Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA., Long JA; Department of Molecular, Cell and Developmental Biology, University of California Los Angeles, Los Angeles, CA 90095, USA. marty@ucsd.edu jeffalong@ucla.edu., Yanofsky MF; Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA. marty@ucsd.edu jeffalong@ucla.edu. |
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| Jazyk: | angličtina |
| Zdroj: | Science (New York, N.Y.) [Science] 2015 Feb 06; Vol. 347 (6222), pp. 655-9. Date of Electronic Publication: 2015 Jan 22. |
| DOI: | 10.1126/science.aaa0196 |
| Abstrakt: | The root meristem consists of populations of distal and proximal stem cells and an organizing center known as the quiescent center. During embryogenesis, initiation of the root meristem occurs when an asymmetric cell division of the hypophysis forms the distal stem cells and quiescent center. We have identified NO TRANSMITTING TRACT (NTT) and two closely related paralogs as being required for the initiation of the root meristem. All three genes are expressed in the hypophysis, and their expression is dependent on the auxin-signaling pathway. Expression of these genes is necessary for distal stem cell fate within the root meristem, whereas misexpression is sufficient to transform other stem cell populations to a distal stem cell fate in both the embryo and mature roots. (Copyright © 2015, American Association for the Advancement of Science.) |
| Databáze: | MEDLINE |
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