Understanding Vegetative Desiccation Tolerance Using Integrated Functional Genomics Approaches Within a Comparative Evolutionary Framework

摘要: Desiccation tolerance (DT) is defined as the equilibration of protoplasmic water potential with that surrounding air (generally dry) without loss viability upon rehydration. Vegetative DT widespread among mosses and lichens, but relatively rare in vascular plants (0.15%). Recent studies selected resurrection species indicate while might have evolved unique adaptive proteins, enzymes, antioxidants, molecular genetic basis lies orchestration transcriptional posttranscriptional regulatory programs operate during drying requires signaling pathways mechanisms, aspects which resemble developmental present orthodox seeds, result accumulation oligosaccharides, stress reactive oxygen scavenging well alterations composition structure membrane lipids. Functional genomics using transcriptome, proteome, metabolome analyses are just beginning to unravel system complexity required orchestrate metabolic symphony DT. The status current gene discovery efforts summarized along major transcriptome technologies available currently conduct desiccation sensitive versus tolerant comparisons. These strategies, integrated large-scale proteomic metabolomic investigations progress, promise revolutionize our understanding mechanistic plants.