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[Effect of oligosaccharides on adaptation of winter wheat seedlings to negative temperature]. 2003

O A Zabotina, and D A Aiupova, and T E Toroshchina, and A I Zabotin
Kazan Institute of Biochemistry and Biophysics, Russian Academy of Sciences, Kazan, 420503 Russia. zabotina@sci.kcn.ru

We studied the dynamics of endogenous content of bioactive oligosaccharides in the roots of winter wheat seedlings. Previously these oligosaccharides proved to mediate development of frost resistance during the first days of hardening (Zabotina et al., 1998). The changes in their endogenous content can be described by a single-humped curve peaking 6 h after the onset of frost hardening. The capacity of these polysaccharides to increase frost resistance (LT50 was evaluated by leakage of electrolytes) when added to growth medium did not depend on the pretreatment duration (from 1.5 to 18 h) but decreased if they were introduced in the course of the adaptive response. Inhibition of the adaptive response by inhibitors of RNA and protein synthesis was ceased in the presence of the oligosaccharides. We believe that the oligosaccharides that are products of metabolism of the cell wall polysaccharides are involved in adaptation to low temperature.

UI MeSH Term Description Entries
D009844 Oligosaccharides Carbohydrates consisting of between two (DISACCHARIDES) and ten MONOSACCHARIDES connected by either an alpha- or beta-glycosidic link. They are found throughout nature in both the free and bound form. Oligosaccharide
D011500 Protein Synthesis Inhibitors Compounds which inhibit the synthesis of proteins. They are usually ANTI-BACTERIAL AGENTS or toxins. Mechanism of the action of inhibition includes the interruption of peptide-chain elongation, the blocking the A site of ribosomes, the misreading of the genetic code or the prevention of the attachment of oligosaccharide side chains to glycoproteins. Protein Synthesis Antagonist,Protein Synthesis Antagonists,Protein Synthesis Inhibitor,Antagonist, Protein Synthesis,Antagonists, Protein Synthesis,Inhibitor, Protein Synthesis,Inhibitors, Protein Synthesis,Synthesis Antagonist, Protein,Synthesis Inhibitor, Protein
D003080 Cold Temperature An absence of warmth or heat or a temperature notably below an accustomed norm. Cold,Cold Temperatures,Temperature, Cold,Temperatures, Cold
D000222 Adaptation, Physiological The non-genetic biological changes of an organism in response to challenges in its ENVIRONMENT. Adaptation, Physiologic,Adaptations, Physiologic,Adaptations, Physiological,Adaptive Plasticity,Phenotypic Plasticity,Physiological Adaptation,Physiologic Adaptation,Physiologic Adaptations,Physiological Adaptations,Plasticity, Adaptive,Plasticity, Phenotypic
D012621 Seasons Divisions of the year according to some regularly recurrent phenomena usually astronomical or climatic. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Seasonal Variation,Season,Seasonal Variations,Variation, Seasonal,Variations, Seasonal
D014908 Triticum A plant genus of the family POACEAE that is the source of EDIBLE GRAIN. A hybrid with rye (SECALE CEREALE) is called TRITICALE. The seed is ground into FLOUR and used to make BREAD, and is the source of WHEAT GERM AGGLUTININS. Wheat,Durum Wheat,Triticum aestivum,Triticum durum,Triticum spelta,Triticum turgidum,Triticum turgidum subsp. durum,Triticum vulgare,Durum Wheats,Wheat, Durum
D018521 Plant Physiological Phenomena The physiological processes, properties, and states characteristic of plants. Plant Physiological Processes,Plant Physiology,Physiology, Plant,Plant Physiologic Phenomena,Plant Physiologic Phenomenon,Plant Physiological Phenomenon,Plant Physiological Process,Phenomena, Plant Physiologic,Phenomena, Plant Physiological,Phenomenon, Plant Physiologic,Phenomenon, Plant Physiological,Phenomenons, Plant Physiological,Physiologic Phenomena, Plant,Physiologic Phenomenon, Plant,Physiological Phenomena, Plant,Physiological Phenomenon, Plant,Physiological Phenomenons, Plant,Physiological Process, Plant,Physiological Processes, Plant,Plant Physiological Phenomenons,Process, Plant Physiological,Processes, Plant Physiological
D036226 Seedlings Young plants produced at the completion of GERMINATION of SEEDS. Seedling,Malted Grain,Sprouted Seeds,Sprouts, Plant,Grain, Malted,Grains, Malted,Malted Grains,Plant Sprout,Plant Sprouts,Seed, Sprouted,Seeds, Sprouted,Sprout, Plant,Sprouted Seed

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