Physiologic responses and gene diversity indicate olive alternative oxidase as a potential source for markers involved in efficient adventitious root induction

Physiologia Plantarum
Elisete Santos MacedoBirgit Arnholdt-Schmitt

Abstract

Olive (Olea europaea L.) trees are mainly propagated by adventitious rooting of semi-hardwood cuttings. However, efficient commercial propagation of valuable olive tree cultivars or landraces by semi-hardwood cuttings can often be restricted by a low rooting capacity. We hypothesize that root induction is a plant cell reaction linked to oxidative stress and that activity of stress-induced alternative oxidase (AOX) is importantly involved in adventitious rooting. To identify AOX as a source for potential functional marker sequences that may assist tree breeding, genetic variability has to be demonstrated that can affect gene regulation. The paper presents an applied, multidisciplinary research approach demonstrating first indications of an important relationship between AOX activity and differential adventitious rooting in semi-hardwood cuttings. Root induction in the easy-to-root Portuguese cultivar 'Cobrançosa' could be significantly reduced by treatment with salicyl-hydroxamic acid, an inhibitor of AOX activity. On the contrary, treatment with H2O2 or pyruvate, both known to induce AOX activity, increased the degree of rooting. Recently, identification of several O. europaea (Oe) AOX gene sequences has been reported from our ...Continue Reading

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Citations

Nov 28, 2009·Physiologia Plantarum·Hélia Guerra CardosoBirgit Arnholdt-Schmitt
Oct 30, 2009·Physiologia Plantarum·António Miguel FredericoBirgit Arnholdt-Schmitt
Mar 10, 2015·Plant Cell Reports·Vahideh HedayatiLuciana Baldoni
Mar 19, 2016·Journal of the Science of Food and Agriculture·Antonella PasqualoneFrancesco Caponio
Feb 14, 2012·Journal of Plant Physiology·Debabrata SircarBirgit Arnholdt-Schmitt
Oct 22, 2016·PloS One·Tânia NobreBirgit Arnholdt-Schmitt
Sep 29, 2009·Physiologia Plantarum·Alexios N PolidorosBirgit Arnholdt-Schmitt
Oct 30, 2009·Physiologia Plantarum·António Miguel FredericoBirgit Arnholdt-Schmitt
Oct 15, 2009·Physiologia Plantarum·Maria Doroteia CamposBirgit Arnholdt-Schmitt
Feb 16, 2021·Frontiers in Plant Science·Shi-Weng Li
Dec 25, 2015·Plant Physiology·Bianka Steffens, Amanda Rasmussen
Jul 3, 2021·Frontiers in Immunology·Birgit Arnholdt-SchmittJosé Hélio Costa

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