Resurrection plants have ability to tolerate long periods of dehydration without suffering permanent protoplasmic damages, entering in a state of anabiose and recovering their metabolic competence when rehydrated. The aim of this study is to evaluate the metabolism of inactivation and physiological recovery after desiccation in Pitcairnia lanuginosa, a bromelid occurring in cerrado rupestre from Mato Grosso do Sul. Plants will be grown in a greenhouse, submitted to water deficit through irrigation suspension during different periods and, later, rehydrated. Physiological and biochemical parameters will be evaluated including relative water content (TRA), water potential (¨w), osmotic potential (¨s), leaf gas exchanges, leaf content of photosynthetic pigments, carbohydrates, metabolic profile and analysis of antioxidant activity of leaves. Through the analysis of its adaptive mechanisms to desiccation tolerance we expect to contribute to the understanding of plant responses to water deficit.
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