Direct roles of SPEECHLESS in the specification of stomatal self-renewing cells.
Direct roles of SPEECHLESS in the specification of stomatal self-renewing cells.
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DOI:
10.1126/science.1256888
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发表时间:
2014-09-26
期刊:
影响因子:
--
通讯作者:
Bergmann DC
中科院分区:
文献类型:
--
作者:
Lau OS;Davies KA;Chang J;Adrian J;Rowe MH;Ballenger CE;Bergmann DC
Lineage-specific stem cells are critical for the production and maintenance of specific cell types and tissues in multicellular organisms. In Arabidopsis, the initiation and proliferation of stomatal lineage cells is controlled by the basic helix-loop-helix transcription factor SPEECHLESS (SPCH). SPCH-driven asymmetric and self-renewing divisions allow flexibility in stomatal production and overall organ growth. How SPCH directs stomatal lineage cell behaviors, however, is unclear. Here, we improved the chromatin immunoprecipitation (ChIP) assay and profiled the genome-wide targets of Arabidopsis SPCH in vivo. We found that SPCH controls key regulators of cell fate and asymmetric cell divisions and modulates responsiveness to peptide and phytohormone-mediated intercellular communication. Our results delineate the molecular pathways that regulate an essential adult stem cell lineage in plants.
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