Adventitous root formation on olive cuttings: a physiological response under oxidative stress?

Cofinanciado por:
Project title | Adventitous root formation on olive cuttings: a physiological response under oxidative stress?
Project Code | PTDC/AGR-AAM/103377/2008
Main objective |

Region of intervention |

Beneficiary entity |
  • Universidade de Évora(líder)
  • Instituto Nacional de Recursos Biológicos, I.P.(parceiro)

Approval date | 16-09-2009
Start date | 01-05-2010
Date of the conclusion | 30-04-2013

Total eligible cost |
European Union financial support |
National/regional public financial support |

Summary

Around the Mediterranean basin, there are several hard-to-root olive cultivars, some of them with high economical importance, as it is the case for the Portuguese cv. ´Galega vulgar´, used for high quality olive oil production in most Portuguese regions with geographical determination. The project coordinator developed since 1992, efforts to improve the rooting capacity of the cv. ‘Galega vulgar’, testing most of the factors known to affect adventitious rooting, but the results weren’t always encouraging. To improve rooting ability is critical for those recalcitrant olive cultivars, but, it implies fundamental research on biology and genetics of adventitious root formation. -Are there differentiated origins for the adventitious root primordial in difficult and in easy to root olive cultivars?-Are oxidative enzymes and AOX jointly involved on metabolism control of the adventitious rooting process? Light microscopy will be used on histological studies to confirm origin of the adventitious roots.Gas chromatography with mass spectrometry (GCMS) either by Electron Impact (EI+) or ion chemical ionization will be used for evaluation of the endogenous levels of auxin and auxin conjugates.Spectrophotometric techniques and high performance thin layer chromatography (HPTLC) will be used for evaluation of the enzymatic activity during the rooting process.Molecular biology techniques, including quantitative and semiquantitative RT-PCR for measurement of AOX expression.

Objectives, activities and expected/achieved results

Objectives

Our main goal in this project is to better understand the metabolism control of adventitious rooting formation and not to empirically improve the rooting ability of the olive cultivars. However, due to the new perspective of a possible involvement of AOX on the process, treatments anti-oxidants and stimulators of AOX activity will be tested in the difficult to root cv. ‘Galega vulgar’.

Activities

Indicadores de realização previstos para o projecto 

-Artigos em revistas internacionais - 6

-Artigos em revistas nacionais - 3

-Comunicações em encontros científicos internacionais - 6

-Comunicações em encontros científicos nacionais - 4

-Teses de Mestrado - 2