Erblichkeitsstudien am SeidenspinnerBombyx mori L.

Ohne ZusammenfassungMit 2 Textfiguren     

Erblichkeitsstudien am SeidenspinnerBombyx mori L

Ohne ZusammenfassungMit 2 Textfiguren     

Erblichkeitsstudien am SeidenspinnerBombyx mori L

Ohne Zusammenfassung     

Erblichkeitsstudien an Schmetterlingen III

Ohne ZusammenfassungHierzu Tafel 6–8 und 2 Textfiguren.     

Erblichkeitsstudien an Schmetterlingen I

Ohne ZusammenfassungMit Tafel I u. II und 23 Fig. im Text.     

Transgenic breeding of anti-Bombyx mori L. nuclear polyhedrosis virus silkworm Bombyx mori

Silkworm strains resistant to Bombyx mori L. nuclear polyhedrosis virus were obtained through transgenic experiments. piggyBac transposon with an A3 promoter were randomly inserted into the silkworm, driving the enhanced green fluorescent protein (EGFP) reporter gene into the silkworm genome. Polymerase chain reaction results verified the insertion of the extraneous EGFP gene, and fluorescence microscopy showed that the EGFP was expressed in the midgut tissue. The morbidity ratio of the nuclear polyhedrosis decreased from 90% in the original silkworm strain to 66.7% in the transgenic silkworm strain. Compared with the resistance to the Bombyx mori L. nuclear polyhedrosis virus in the Qiufeng strain, which is commonly used in the production, there was an increase of 33 centesimal points in the transgenic silkworms. The antivirotic character in the Chunhua x Qiuyue strain, which was bred from a different transgenic family, was about 10 centesimal points higher than that in the Qiufeng x Baiyu, another crossbreed used in production. Our results indicated a good application value of the transposon-inserted mutation in the breeding of anti-BmNPV silkworm strain.     

Untersuchungen am Phloemexsudat von Cucurbita pepo L.

Summary Tests for enzymes of gluconeogenesis and of the synthesis and degradation of sucrose and polysaccharides have been carried out in the phloem exudate of Cucurbita pepo. All the enzymes which are necessary for the synthesis of sucrose and polysaccharides from metabolites of the citric acid cycle were found to be present in the exudate, except phosphoenolpyruvate carboxykinase. The polysaccharide synthetase was found to exhibit higher activity with glycogen (which is an unnatural polysaccharide in higher plants) than with starch. In addition, polysaccharide synthetase activity could be increased remarkably with 2 mM glucose-6-phosphate and glycogen as primer. Among the enzymes which catabolize sucrose and polysaccharides (phosphorylase, invertase, sucrose phosphorylase), only sucrose phosphorylase showed activity.     

Morphologisch-anatomische Untersuchungen am Kelch des LeinsLinum usitatissimum L.

Ohne ZusammenfassungMit 3 Textabbildungen     

家蚕化性及其变化的调控

化性是家蚕的一种重要性状,不仅受遗传基因控制,还受温度、光线等外界环境条件的影响而发生变化。介绍了家蚕化性变化的因素及其机理,并根据家蚕化性的特性,论述了养蚕生产上调控家蚕化性以提高丝量丝质、防止生种与再生卵发生的技术措施。     

Elektronenmikroskopische Untersuchungen am Bauchmark und Oberschlundganglion vonLumbricus terrestris L.

Ohne Zusammenfassung     

Partial purification of prostaglandin synthetase from silkmoth Bombyx mori L.

Prostaglandin synthetase has been isolated and purified from the post mitochondrial supernatant of the testis of male silkmoth Bombyx mori L. A 3-fold purification was achieved compared to that of post mitochondrial supernatant. The partially purified enzyme converted arachidonic acid to PGE₂in vitro in the presence of haemin and hydroquinone.