ECOPHYSIOLOGICAL ASPECTS AND GROWTH IN CORN SUBJECT TO FLOODING

Abstract

All aspects of growth and development of plants can be affected by water stress and water saturation in the tissues caused by excessive evaporative demand and / or limited water supply. The consequences of flooding at the plant will be chlorosis, wilting premature decline in photosynthetic capacity, water potential and the concentration of nutrients in leaves and decreased growth. The aim of this study was to evaluate the effects of flooding on relative water content, transpiration, stomatal conductance, the root / shoot and total dry matter in maize plants subjected to flooding. The experiment was conducted in a greenhouse at the Federal Rural University of Amazonia (UFRA – Capitão Poço), using corn plant variety BR 5102, the experimental design was completely randomized design (CRD) with 2 x 4 factorial, with two conditions water: control, drought and four cycles of stress with 15 repetitions. Achieved significant results in all parameters evaluated, concluding that the flooding negatively in the ecophysiology of plant and total dry mass.   KEYWORDS: anoxia, relative water content, transpiration.