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Author (up) Ambrosone, A.; Costa, A.; Leone, A.; Grillo, S. file  url
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  Title Beyond transcription: RNA-binding proteins as emerging regulators of plant response to environmental constraints Type Journal Article
  Year 2012 Publication Plant Science : an International Journal of Experimental Plant Biology Abbreviated Journal Plant Sci  
  Volume 182 Issue Pages 12-18  
  Keywords Abscisic Acid/metabolism; Acclimatization/*physiology; Gene Expression Regulation, Plant; Osmotic Pressure/physiology; *Plant Physiological Processes; Plants/genetics; RNA-Binding Proteins/genetics/metabolism/*physiology; Transcription, Genetic  
  Abstract RNA-binding proteins (RBPs) govern many aspects of RNA metabolism, including pre-mRNA processing, transport, stability/decay and translation. Although relatively few plant RNA-binding proteins have been characterized genetically and biochemically, more than 200 RBP genes have been predicted in Arabidopsis and rice genomes, suggesting that they might serve specific plant functions. Besides their role in normal cellular functions, RBPs are emerging also as an interesting class of proteins involved in a wide range of post-transcriptional regulatory events that are important in providing plants with the ability to respond rapidly to changes in environmental conditions. Here, we review the most recent results and evidence on the functional role of RBPs in plant adaptation to various unfavourable environmental conditions and their contribution to enhance plant tolerance to abiotic stresses, with special emphasis on osmotic and temperature stress.  
  Call Number Serial 1226  
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Author (up) Powell, M.L.; Watts, S.A. file  url
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  Title Effect of temperature acclimation on metabolism and hemocyanin binding affinities in two crayfish, Procambarus clarkii and Procambarus zonangulus Type Journal Article
  Year 2006 Publication Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology Abbreviated Journal Comp Biochem Physiol A Mol Integr Physiol  
  Volume 144 Issue 2 Pages 211-217  
  Keywords Acclimatization/*physiology; Animals; Astacoidea/*metabolism; Basal Metabolism; *Body Temperature Regulation; Carrier Proteins/metabolism; Climate; Ecosystem; Female; Geography; Hemocyanin/*metabolism; Isoelectric Focusing; Male; Oxygen Consumption; Temperature  
  Abstract Procambarus clarkii and Procambarus zonangulus are two of the most widespread crayfish species in North America. In regions where their ranges overlap species composition can vary greatly. The physiological basis for this variable species composition is unknown. Temperature and oxygen level are two parameters that vary in shallow water habitats. We examined the metabolic rate and hemocyanin binding affinities in relation to thermal history. Temperature acclimation did not have the predicted effect on metabolic rate. Acclimation to high temperature (30 degrees C) decreased metabolic rate at 35 degrees C for both species. Low temperature acclimation (10 degrees C) resulted in 20% mortality in P. clarkii and 100% mortality in P. zonangulus when exposed to 35 degrees C. The range of P. clarkii is known to extend farther south than that of P. zonangulus, and this response may be a consequence of adaptations to higher temperatures in this range. Hemocyanin binding affinity was directly affected by assay and acclimation temperature. The highest P(50) values were recorded for crayfish of both species acclimated to 10 degrees C and assayed at 30 degrees C. There was also a shift in the isoelectric points of hemolymph proteins (possibly due to structural changes) that correlated with and an increase in the hemocyanin binding affinity following acclimation to high temperatures (30 degrees C) in both species.  
  Call Number Serial 1339  
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