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Comparative Transcriptome Profiling Provides Insights Into Plant Salt Tolerance In Seashore Paspalum (Paspalum Vaginatum), Peipei Wu, Steven Cogill, Yijian Qiu, Zhigang Li, Man Zhou, Qian Hu, Zhihui Chang, Hong Luo, Rooksana E. Noorai, Xiaoxia Xia, Christopher Saski, Paul Raymer
Comparative Transcriptome Profiling Provides Insights Into Plant Salt Tolerance In Seashore Paspalum (Paspalum Vaginatum), Peipei Wu, Steven Cogill, Yijian Qiu, Zhigang Li, Man Zhou, Qian Hu, Zhihui Chang, Hong Luo, Rooksana E. Noorai, Xiaoxia Xia, Christopher Saski, Paul Raymer
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Background
Seashore paspalum (Paspalum vaginatum), a halophytic warm-seasoned perennial grass, is tolerant of many environmental stresses, especially salt stress. To investigate molecular mechanisms underlying salinity tolerance in seashore paspalum, physiological characteristics and global transcription profiles of highly (Supreme) and moderately (Parish) salinity-tolerant cultivars under normal and salt stressed conditions were analyzed.
Results
Physiological characterization comparing highly (Supreme) and moderately (Parish) salinity-tolerant cultivars revealed that Supreme’s higher salinity tolerance is associated with higher Na+ and Ca2+ accumulation under normal conditions and further increase of Na+ under salt-treated conditions (400 mM NaCl), possibly by vacuolar sequestration. Moreover, K+ retention under …