Trocas gasosas de Ipomoea cavalcantei em diferentes áreas da Floresta Nacional de Carajás

Abstract

Flor de Carajás is an ornamental plant native from Carajás region that helps form the Canga vegetation, being used to restore recovery areas that were degraded by local mining. The performance of Ipomoea cavalcantei plants in different environments of the Carajás National Forest was evaluated, considering their ability to adapt or not in different places in which they were submitted. For this, analyzes of gas exchange via IRGA were carried out in five environments in which the plants were submitted, in order to evaluate in which of them the Flor de Carajás has the best parameters of gas exchange and if it has the potential to be used as a plant for revegetation of degraded areas. The experiment was carried out from April 17 to 21 at VALE S.A. and data were obtained on five evaluation parameters: net photosynthesis rate, stomatal conductance, transpiration, leaf temperature and water use efficiency. There were no differences between the parameters of net photosynthesis, but for stomatal conductance and transpiration plants from the natural environment N1 had higher mean values ​​when compared to the others. As for leaf temperature, the plants rescued had the highest values. Finally, in terms of water use efficiency, it can be seen that plants from seed in the RAD environment were those that had better results, therefore making better use of water. The plants of Ipomoea cavalcantei showed adaptation behavior in gas exchange in the different environments evaluated within the Carajás National Forest.