Journal
CURRENT OPINION IN PLANT BIOLOGY
Volume 12, Issue 5, Pages 548-555Publisher
CURRENT BIOLOGY LTD
DOI: 10.1016/j.pbi.2009.07.009
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Funding
- NSF [DBI 0820755, MCB 0519869]
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The structural simplicity of the gaseous hormone ethylene stands in contrast with the complexity of the physiological processes ethylene regulates. Initial studies suggested a simple linear arrangement of signaling molecules leading from the ethylene receptors to the EIN3 family of transcription factors. Recent discoveries have substantially changed this view. Current models suggest existence of a complex signaling pathway composed of several phosphorylation cascades, feed back-regulated transcriptional networks, and protein and mRNA turnover regulatory modules. Interactions between ethylene and other signals determine which of the ethylene-mediated responses get activated in a particular cell at a particular time. Tissue-specific regulation of auxin biosynthesis, transport, and response by ethylene is emerging as a key element in this signal integration process.
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