Crescimento e metabolismo foliar de mudas de Ormosia arborea (Vell.) (FABACEAE) sob alagamento

Abstract

For the restauration of areas liable to flooding, it is important to insert tolerant species, in order to avoid future prejudice in the settlement of the local seedlings. In view of the above, this article had as its goal evaluate aspects of growth, photochemistry of the photosynthesis and antioxidants activities of the Ormosia arborea leaves under flood. The vases with O.arborea seedlings were submitted to a 5 cm water level above the substrate for 0, 30 and 60 days, with an exception to the control treatment which maintaining 70% of the retention capacity of water of the substrate. The seedlings were evaluated according to the leaf area, chlorophyll index, initial fluorescence (F0) and potential quantum efficiency of the photosystem II (Fv/Fm) and enzymatic activity of peroxidase (POX) and superoxide dismutases (SOD). All of the leaves of O. arborea survived to the overflow cycle. Small physiological alterations did not damaged the seedlings growth showing their dynamism and ability to survive in temporary overflowed areas.