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Ein Versuch zur bestimmung des Geschlechts bei Ginko biloba L. mit Isoenzymen
Šiftar, Aleksander ; Štampar, Franci
Ginko is one of the most interesting plants for use in the urban environment because extraordinry wide ecological amplitude. It is a decidous plant, the masculine plants are more useful than the ...feminine ones. The fruits, rooting on the ground, develop an unpleasant smell. It is not possible with certainty to distinguish from feminine plants until they start flowering. According to some physiological and morphological criteria the plants differ from each other. However, these differences have not enought constancy to be reliable. They become more distinguishing only with maturity and during the flowering period, which is too late for nursery use. The statement that the number of ridges on the nut can be used to distinguish sexes was verified. Ginko leaves were analysed during the flowering period in order to identify the presence of the folowing eight isoenzymes: Aspartate aminotransferase (AAT), Glucose-6-phosphat isomerase (GPI), Malate dehidrogenase (MDH), Malic enzyme (ME), Peroxidase (PX), Phosphoglucomutase (PGM), Phosphogluconate dehidrogenase (PGD), Triosephosphate isomerase (TPI). No differences between sexes and number of nut ridges were found. In the starch gel we noticed only little bands, which is a sing of a small genetic variability of Ginko
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