IBONE   05434
INSTITUTO DE BOTANICA DEL NORDESTE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
SURVIVAL OF ADVENTITIOUS ROOTS IS NECESSARY FOR TOMATO PLANT RECOVERY FROM FLOODING STRESS
Autor/es:
MIGNOLLI, FRANCESCO; MORINIGO,SANTIAGO; VIDOZ, MARIA L.
Lugar:
Córdoba
Reunión:
Congreso; 32° REUNIÓN ARGENTINA E FISIOLOGÍA VEGETAL; 2019
Resumen:
Climate change has brought about extreme weatherevents such as heavy rains, which frequently result inflooding and agricultural losses. Tomato plants displaymorphological and physiological adjustments whichallow them to acclimatize to the hypoxic environmentresulting from flooding events. However, tomato plantbehaviour during the recovery phase has so far receivedlittle attention. In order to assess tomato plant abilityto fully tolerate flooding stress, we have studied plantfitness to regain biomass accumulation and stomatalconductance. Flooding treatments lasted 10 days andplants were allowed to recover for 15 days. Althoughbiomass accumulation was lower in stressed plantscompared to control ones, the daily growth rate duringthe recovery period was higher in plants coming fromflooding than in control plants. In addition, leaf areawas similar in control and recovering plants. Keepingadventitious roots alive by hilling resulted in plantsthat regained stomatal conductance after only one dayof recovery and showed lower formation of hydrogen peroxide respect to plants in which adventitious rootswere left in the air. Moreover, considering biomass allocation to leaves and roots, hilled plants strategy to recover seems to be based on increasing radiationinterception to sustain active adventitious root growth.