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- Title
An integrative overview of the molecular and physiological responses of sugarcane under drought conditions.
- Authors
Vital, Camilo; Giordano, Andrea; de Almeida Soares, Eduardo; Rhys Williams, Thomas; Mesquita, Rosilene; Vidigal, Pedro; de Santana Lopes, Amanda; Pacheco, Túlio; Rogalski, Marcelo; de Oliveira Ramos, Humberto; Loureiro, Marcelo
- Abstract
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.
- Subjects
BRAZIL; SUGARCANE industry; ABIOTIC stress; CROPS; DROUGHT tolerance; SUGARCANE varieties; PHOTOSYNTHESIS
- Publication
Plant Molecular Biology, 2017, Vol 94, Issue 6, p577
- ISSN
0167-4412
- Publication type
Article
- DOI
10.1007/s11103-017-0611-y