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.
OBJECTIVE: To set up the optimums of tissue culture for Cornus officinalis. METHOD: A section of stems of the fine varieties of Cornus officinalis were strictly sterilized, cultivated and geminated in medium with addition of different kinds of hormone. RESULT AND CONCLUSION: The WPM medium with 6-BA 2.0 mg.L-1 + ZT 0.1 mg.L-1 + NAA 0.1 mg.L-1 was the optimum medium for the multiplication of adventitious buds. The WPM medium with 6-BA 1.0 mg.L-1 + ZT 0.1 mg.L-1 + GA3 0.5 mg.L-1 + NAA 0.1 mg.L-1 was the optimum medium for cultivation in strength. The plantlet could root well in 1/2 MS medium with IBA 1.0 mg.L-1 + 6-BA 0.1 mg.L-1.
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.