Differences in leaf proteome response to cold acclimation between Lolium perenne plants with distinct levels of frost tolerance |
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Authors: | Bocian Aleksandra Kosmala Arkadiusz Rapacz Marcin Jurczyk Barbara Marczak Łukasz Zwierzykowski Zbigniew |
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Institution: | a Institute of Plant Genetics, Polish Academy of Sciences, Strzeszyńska 34, 60-479 Poznań, Poland b University of Agriculture in Kraków, Department of Plant Physiology, Pod?u?na 3, 30-239 Cracow, Poland c Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland |
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Abstract: | Perennial ryegrass (Lolium perenne) is a high quality forage and turf grass mainly due to its excellent nutritive values and rapid establishment rate. However, this species has limited ability to perform in harsh winter climates. Though winter hardiness is a complex trait, it is commonly agreed that frost tolerance (FT) is its main component. Species growing in temperate regions can acquire FT through exposure to low, non-lethal temperatures, a phenomenon known as cold acclimation (CA). The research on molecular basis of FT has been performed on the model plants, but they are not well adapted to extreme winter climates. Thus, the mechanisms of cell response to low temperature in winter crops and agronomically important perennial grasses have yet to be revealed. Here, two L. perenne plants with contrasting levels of FT, high frost tolerant (HFT) and low frost tolerant (LFT) plants, were selected for comparative proteomic research. The work focused on analyses of leaf protein accumulation before and after 2, 8, 26 h, and 3, 5, 7, 14 and 21 days of CA, using a high-throughput two-dimensional electrophoresis, and on the identification of proteins which were accumulated differentially between the selected plants by the application of mass spectrometry (MS). Analyses of 580 protein profiles revealed a total of 42 (7.2%) spots that showed at a minimum of 1.5-fold differences in protein abundance, at a minimum of at one time point of CA between HFT and LFT genotypes. It was shown that significant differences in profiles of protein accumulation between the analyzed plants appeared most often on the 5th (18 proteins) and the 7th (19 proteins) day of CA. The proteins derived from 35 (83.3%) spots were successfully identified by the use of MS and chloroplast proteins were shown to be the major group selected as differentially accumulated during CA. The functions of the identified proteins and their probable influence on the level of FT in L. perenne are discussed. |
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Keywords: | APX ascorbate peroxidases ATP adenosine triphosphate CA cold acclimation CS cysteine synthase 2-DE two-dimensional electrophoresis ESI electrospray ionization Fp Festuca pratensis FT frost tolerance GS glutamine synthetase HFT high frost tolerant Hsp heat shock protein IEF isoelectrofocusing LFT low frost tolerant Lp Lolium perenne LSR a large subunit of ribulose-1 5-bisphosphate carboxylase/oxygenase MALDI-ToF Matrix Assisted Laser Desorption/Ionization Time of Flight MS mass spectrometry MSDB Model System Database MW molecular weight PPFD photosynthetic photon flux density RuBisCO ribulose-1 5-bisphosphate carboxylase/oxygenase RA RuBisCO activase RBP RuBisCO binding protein ROS reactive oxygen species ToF - Q Time-of-Flight - Quadrupole % Vol the normalized volumes WH winter-hardiness |
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