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Elicitors of defence responses repress a gibberellin signalling pathway in barley embryos

Authors:	Elena Loreti Daniela Bellincampi Christel Millet Amedeo Alpi Pierdomenico Perata

Institution:	^aIstituto di Biologia e Biotecnologia Agraria, sezione di Pisa, Via del Borghetto 80, 56100 Pisa, CNR, Italy ^bDipartimento di Biologia Vegetale Universitaapos; di Roma «La Sapienza», P.le A.Moro 5, 00185 Roma, Italy ^cDepartment of Crop Plant Biology, University of Pisa, Via Mariscoglio 34, 56124 Pisa, Italy ^dDepartment of Agricultural Sciences, University of Modena and Reggio Emilia, Via Kennedy 17, 42100 Reggio Emilia, Italy

Abstract:	Elicitors of defence response can modulate pathways other than those related to pathogen attacks. In this paper, we demonstrate that, as with sugars, chitosan and oligogalacturonides (OGs) can repress the gibberellin signalling pathway leading to the induction of -amylase in barley embryos. These results are suggestive of a complex cross-talk between the defence, hormonal and metabolic signalling pathways.

Keywords:	sciencedirect com/scidirimg/entities/204e -amylase" target="_blank">gif" alt="greek small letter alpha" title="greek small letter alpha" border="0">-amylase barley chitosan oligogalacturonides sugar repression
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