Research Article

EIN2, a Bifunctional Transducer of Ethylene and Stress Responses in Arabidopsis

Science  25 Jun 1999:
Vol. 284, Issue 5423, pp. 2148-2152
DOI: 10.1126/science.284.5423.2148

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Abstract

Ethylene regulates plant growth, development, and responsiveness to a variety of stresses. Cloning of the Arabidopsis EIN2 gene identifies a central component of the ethylene signaling pathway. The amino-terminal integral membrane domain of EIN2 shows similarity to the disease-related Nramp family of metal-ion transporters. Expression of the EIN2 CEND is sufficient to constitutively activate ethylene responses and restores responsiveness to jasmonic acid and paraquat-induced oxygen radicals to mutant plants. EIN2 is thus recognized as a molecular link between previously distinct hormone response pathways. Plants may use a combinatorial mechanism for assessing various stresses by enlisting a common set of signaling molecules.

  • * These authors contributed equally to this work and are listed alphabetically.

  • To whom correspondence should be addressed. E-mail: jecker{at}atgenome.bio.upenn.edu

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