ASPECTS OF METABOLISM AND MORPHOLOGY OF C EDRELLA-FISSILIS VELL AND ANADENANTHERA-COLUBRINA (VELL) BREN TO DIFFERENTS WATERS REGIMES

Plants of Cedrela fissilis and Anadenanthera colubrina were placed in non-flooded soil control, flooded soil with stagnant water, and floode d soil with running water during 60 days. After appearance of adventit ious roots and/or hipertrophic lenticels some plants had adventitious roots excised and hipertrophic lenticels covered. The relative growth rate and respiration rate of roots were studied. From the results pres ented it seems that in C. fissilis and A. colubrina the survival strat egies are distincts. C. fissilis developed morphological adaptations t hat supports the aerobic respiration but don't allow the growth. On th e other hand A. colubrina produced few hipertrophic lenticels and the respiration rate was low. This indicates that an anaerobic metabolism supplied the energy requirements and allowed the growth.