Mechanisms of physiological inactivation and recovery involved in tolerance to desiccation of Pitcairnia lanuginosa Ruiz Pav., a Bromeliaceae from the cerrado

• Grant number: 12/14339-7
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: October 01, 2012
• End date: September 30, 2015
• Field of knowledge: Biological Sciences - Botany - Pant Physiology
• Principal Investigator: Marcia Regina Braga
• Grantee: Evandro Alves Vieira
• Host Institution: Instituto de Botânica. Secretaria de Meio Ambiente, Infraestrutura e Logística (São Paulo - Estado). São Paulo , SP, Brazil

Abstract

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.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VIEIRA, EVANDRO ALVES; CENTENO, DANILO DA CRUZ; FRESCHI, LUCIANO; DA SILVA, EMERSON ALVES; BRAGA, MARCIA REGINA. The dual strategy of the bromeliad Pitcairnia burchellii Mez to cope with desiccation. ENVIRONMENTAL AND EXPERIMENTAL BOTANY, v. 143, p. 135-148, NOV 2017. (12/14339-7, 12/16332-0)

VIEIRA, EVANDRO ALVES; SILVA, KLEBER RESENDE; ORIANI, ALINE; MORO, CAMILA FERNANDES; BRAGA, MARCIA REGINA. Mechanisms of desiccation tolerance in the bromeliad Pitcairnia burchellii Mez: biochemical adjustments and structural changes. Plant Physiology and Biochemistry, v. 121, p. 21-30, DEC 2017. (12/14339-7, 12/16332-0)