Plant polyamine metabolism and arbuscular mycorrhizal colonization

ECHEVERRÍA, M; MARINA, M; MENÉNDEZ, AB; MONTES, M; RUIZ, OA; SANNAZARO, AI; SCAMBATO, A; SOSA, M

Granada, España

Conferencia; 5th Internacional Conference on Mycorrhiza (ICOM5); 2006

Estación Experimental del Zaidín

  Plant polyamine metabolism and arbuscular mycorrhizal colonization. Echeverría M1., Marina M1., Menéndez A12., Montes M2., Ruiz O1., Sannazzaro A. 1, Scambato A. 2, Sosa M. 12 1Instituto Tecnológico de Chascomús IIB-INTECH (CONICET). 2 Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. ARGENTINA Introduction. Higher polyamine levels are generally observed in mycorrhizal plants compared to non-AM ones. Polyamines (PAS) are small organic cations that are absolutely required for eukaryotic cell growth. These compounds are thought to play an important role in plant responses to a wide array of environmental and biotic stresses. As result of polyamine catabolism by  polyamine oxidases (PAO), Spd and Spm can be oxidised to H2O2, which has been proposed to have roles in plant defense as an antimicrobial compound We are currently analysing two hypothesis 1-modulation of polyamine pools can be one of the mechanisms used by AM fungi to improve L. glaber adaptation to saline soils. 2-polyamines regulate root infection by arbuscular mycorrhizal fungi we  study The influence of colonization by Glomus intraradices On growth and polyamine metabolism of Lotus spp. under salt stress. The effect of altered polyamine levels of transgenic  Nicotiana  tabacum  on root colonization by Glomus intraradices.