An integrative overview of the molecular and physiological responses of sugarcane under drought conditions

• Autor(a) principal: Vital, Camilo Elber
• Data de Publicação: 2017
• Outros Autores: Giordano, Andrea, Soares, Eduardo de Almeida, Williams, Thomas Christopher Rhys, Mesquita, Rosilene Oliveira, Vidigal, Pedro Marcus Pereira, Lopes, Amanda de Santana, Pacheco, Túlio Gomes, Rogalski, Marcelo, Ramos, Humberto Josué de Oliveira, Loureiro, Marcelo Ehlers
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://dx.doi.org/10.1007/s11103-017-0611-y; http://www.locus.ufv.br/handle/123456789/19919
• topic: Abiotic stress; Drought tolerance; Metabolomics; Proteomics; Sugarcane; Transcriptomics

Drought is the main abiotic stress constraining sugarcane production. However, our limited understanding of the molecular mechanisms involved in the drought stress responses of sugarcane impairs the development of new technologies to increase sugarcane drought tolerance. Here, an integrated approach was performed to reveal the molecular and physiological changes in two closely related sugarcane cultivars, including the most extensively planted cultivar in Brazil (cv. RB867515), in response to moderate (−0.5 MPa) and severe (−1 MPa) drought stress at the transcriptional, translational, and posttranslational levels. The results show common and cultivar exclusive changes in specific genes related to photosynthesis, carbohydrate, amino acid, and phytohormone metabolism. The novel phosphoproteomics and redox proteomic analysis revealed the importance of posttranslational regulation mechanisms during sugarcane drought stress. The shift to soluble sugar, secondary metabolite production, and activation of ROS eliminating processes in response to drought tolerance were mechanisms exclusive to cv. RB867515, helping to explain the better performance and higher production of this cultivar under these stress conditions.