PubMed · 13352693
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K B NAZIROV. 1956. [Multiple cornu cutaneum].. https://pubmed.ncbi.nlm.nih.gov/13352693/
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Dehydrins are proteins associated with conditions affecting the water status of plant cells, such as drought, salinity, freezing and seed maturation. Although the function of dehydrins remains unknown, it is hypothesized that they stabilize membranes and macromolecules during cellular dehydration. Red-osier dogwood (Cornus sericea L.), an extremely freeze-tolerant woody plant, accumulates dehydrin-like proteins during cold acclimation and the presence of these proteins is correlated with increased freeze tolerance (Karlson 2001, Sarnighausen et al. 2002, Karlson et al. 2003). Our objective was to determine the location of dehydrins in cold-acclimated C. sericea stems in an effort to provide insight into their potential role in the freeze tolerance of this extremely cold hardy species. Abundant labeling was observed in the nucleus and cytoplasm of cold-acclimated C. sericea stem cells. In addition, labeling was observed in association with plasmodesmata of cold-acclimated vascular cambium cells. The unique association of dehydrin-like proteins with plasmodesmata has not been reported previously.
According to the survey of Cornus officinalis in the main planting areas of Henan, Zhejiang and Shanxi province, the fruit shape can be divided into seven types, cylindricform, ellipticform, long pear-shape, short pear-shape, long cylindricform, short cylindricform and spindlefrom. These fruit types, growth habit and dried pulp productivity can provide scientific basis for breeding cultivation of Cornus officinalis varietis.
OBJECTIVE: To study the tonic constituents in Fructus Corni, the pulp of Cornus of ficinalis. METHOD: Hot-water extraction, ethanol precipitation and column chromatography on DEAE-cellulose and Sephadex G-200 were used to isolate and purify the polysaccharides in Fructus Corni. HPGPC was used to determine the purity and measure the mean molecular weight of the polysaccharides. TLC, PC, GC, GC-MS, 13CNMR, partial acid hydrolysis and permethylation to elucidate the structures. RESULT: A water-soluble polysaccharide with mean molecular weight of 2.47 x 10(14), named Co-4, was obtained. It's main chain was (1-->4) linked beta-D-glucan, with branching points at position 6. CONCLUSION: A thorough study on the polysaccharides of Fructus Corni has been made for the first time and the structure of Co-4 has been elucidated.