Issue
Simultaneous responses of photosystem II and soluble proteins of rapeseed to cold acclimation
Corresponding Author(s) : Ali Arminian
Cellular and Molecular Biology,
Vol. 65 No. 2: Issue 2
Abstract
This experiment was conducted to assess the quantitative and qualitative changes in soluble proteins as well as some chlorophyll fluorescence parameters in the leaves of a winter canola (Brassica napus L., cv. Licord) under continuous low temperature. Over the experiment, seedlings were initially grown at 15/10 °C (d/n). At fourth fully expanded leafy stage (day 30), a part of the plants were transferred to 4/2°C for 4 weeks. Plants were sampled for protein extraction from leaves in which chlorophyll fluorescence parameters (Fo, Fv, Fm, Fv/Fo, Fm/Fo, Fv/Fm, Fo´, FV´, Fm´ and some other calculated) were also measured. The results showed a clear increase in soluble proteins quantity caused by cold treatment. The enhancements appeared abruptly following the cold exposure to 4°C and lasted. The electrophoretic protein patterns showed changes in the intensity of some polypeptides, besides, induction a new probable protein weighing 47-kW in response to cold treatment. Cold-triggered reduction in maximum quantum yield of PSII (Fv/Fm) was connected especially with drastic decreasing Fv and Fm. Interestingly, high quantitative amounts of soluble proteins along with induction of the new probable polypeptide induced at cold temperature, were attributed to low deduction of maximum quantum yield of PSII. Additionally, more imperative chlorophyll fluorescence parameters changed e.g. qP, NPQ, qL, Y(II) or Ñ„PSII etc at light. Nowadays, radar charts or spider plots are the most sophisticated multivariate statistical tools representing physiological responses of plants to abiotic stress conditions or even morphophysiological studies of plants. In rapeseed many researches performed by applying the radar charts for low temperature stresses and interpreted their effects more advancely than common statistical tools. We observed a good representation of the chl fluorescence parameters fluctuations using radar plots. Overall, cold-induced soluble proteins accumulated after longer cold-acclimation, can contribute in photosynthetic apparatus protection against low-temperature damages.
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- References
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References
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Rapacz M, Janowiak F. Relationship between prehardening, photosynthetic activity at cold acclimation temperatures and frost tolerance in winter eape (Brassica napus var. oleifera). The consequences for the reliability of fost resistance Estimation under Controlled Conditions. J Agr Crop Sci 1999b; 182(1): 57-63.
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Rapacz M, Wolanin B, Hura K, Tyrka M. The effects of cold acclimation on photosynthetic apparatus and the expression of COR14b in four genotypes of barley (Hordeum vulgare) contrasting in their tolerance to freezing and high-light treatment in cold conditions. Ann Bot 2008; 101(5): 689-699.
Zhang C, Fei S, Warnke S, Li L, Hannapel D. Identification of genes associated with cold acclimation in perennial ryegrass. J Plant Physiol 2009; 166(13): 1436-1445.
Asghari A, Mohammadi SA, Moghaddam M, Toorchi M, Mohammadinasab AD. Analysis of quantitative trait loci associated with freezing tolerance in rapeseed (Brassica napus L.). Biotech Biotech Equipment 2008; 220: 548-552.
Hincha DK. Cryoprotectin: a plant lipid–transfer protein homologue that stabilizes membranes during freezing. Philosophical Transactions Royal Soc London Series B: Biol Sci 2002; 357(1423): 909-916.
Iba K. Acclimative response to temperature stress in higher plants: approaches of gene engineering for temperature tolerance. Ann Rev Plant Biol 2002; 53(1): 225-245.
McClinchey SL, Kott LS. Production of mutants with high cold tolerance in spring canola (Brassica napus). Euphytica 2008; 162(1): 51-67.
Asghari A, Mohammadi SA, Moghaddam M, Mohammaddoost HR. QTL analysis for cold resistance-related traits in Brassica napus using RAPD markers. J Food Agr Env 2007; 5(3): 188-192.
Guy CL. Cold accelimation and freezing stress tolerance: role of protein metabolism. Ann Rev Plant Physiol Plant Mol Biol 1990; 41(1): 187-223.
Huner NPA, í–quist G, Hurry VM, Krol M, Falk S, Griffith M. Photosynthesis, photoinhibition and low temperature acclimation in cold tolerant plants. Photos Res 1993; 37(1): 19-39.
Levitt J. Responses of plants to environmental stresses. v1. Chilling, freezing, and high temperature Stresses: Academic Press. New York; 1980.
Gray GR, Cauvin LP, Sarhan F, Huner NPA. Cold acclimation and freezing tolerance. A complex interaction of light and temperature. Plant Physiol 1997; 114: 467–474.
Chinnusamy V, Zhu J, Zhu JK. Cold stress regulation of gene expression in plants. Trends Plant Sci 2007; 12(10): 444-451.
Howarth CJ, Ougham HJ. Gene expression under temperature stress. New Phytologist 1993; 125(1): 1-26.
Hughes MA, Dunn MA. The molecular biology of plant acclimation to low temperature. J Exp Bot 1996; 47: 291-305.
Theocharis A, Clement C, Barka EA. Physiological and molecular changes in plants grown at low temperatures. Planta 2012; 235: 1091–1105.
Monroy AF, Sarhan F, Dhindsa RS. Cold-induced changes in freezing tolerance, protein phosphorylation, and gene expression (evidence for a role of calcium). Plant Physiol 1993; 102(4): 1227-1235.
Siegenthaler P-A, Murata N. Lipids in Photosynthesis: Structure, Function and Genetics: KLUWER ACADEMIC PUBLISHERS.; 1998.
Wanner LA, Junttila O. Cold-induced freezing tolerance in Arabidopsis. Plant Physiol 1999; 120(2): 391-399.
Thomashow MF. Genes induced during cold acclimation in higher plants. Advances in Low-temperature Biology 1993; 2: 183-210.
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