Desempenho fotossintético, peroxidação lipídica e aspectos morfológicos de papuã exposto a diferentes condições hídricas do solo

This paper aimed to elucidate the behavior of Urochloa plantaginea biotype with differential physiological characteristics, which allows a better growth and development in flooded environment. A completely randomized experimental design was used 2x3, being factors: populations (lowlands highlands) soil water conditions (50% 100% retention capacity (CRA); depth 5 cm). Responses related photosynthetic parameters lipid peroxidation were verified 24h 192h after onset conditions. Morphology-relatedvariables measured at end plant cycle. The lowland compared highland showed superior morphophysiological characteristics under flooding. It can be emphasized, higher use efficiency (about 30%), height, lower aerial part dry matter increment. In addition, shown not vary A, Gs, Ci, E, USA / Ci when exposed cm, 100%CRA condition. Both survived ended their cycle producing seeds. Thus, apossible adaptive process population environment is evidenced.