Hydrogen peroxide and nitric oxide as signalling molecules in plants | Zendy

Steven J. Neill | Zendy

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Hydrogen peroxide and nitric oxide as signalling molecules in plants

Author(s) -

Steven J. Neill

Publication year - 2002

Publication title -

journal of experimental botany

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.616

H-Index - 242

eISSN - 1460-2431

pISSN - 0022-0957

DOI - 10.1093/jexbot/53.372.1237

Subject(s) - abiotic component , nitric oxide , hydrogen peroxide , signalling , abiotic stress , enzyme , chemistry , signalling pathways , function (biology) , microbiology and biotechnology , reactive nitrogen species , antioxidant , biochemistry , cell signaling , signal transduction , biophysics , biology , ecology , organic chemistry , gene

It is now clear that hydrogen peroxide (H(2)O(2)) and nitric oxide (NO) function as signalling molecules in plants. A wide range of abiotic and biotic stresses results in H(2)O(2) generation, from a variety of sources. H(2)O(2) is removed from cells via a number of antioxidant mechanisms, both enzymatic and non-enzymatic. Both biotic and abiotic stresses can induce NO synthesis, but the biosynthetic origins of NO in plants have not yet been resolved. Cellular responses to H(2)O(2) and NO are complex, with considerable cross-talk between responses to several stimuli. In this review the potential roles of H(2)O(2) and NO during various stresses and the signalling pathways they activate are discussed. Key signalling components that might provide targets for enhancing crop production are also identified.

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