The change of glutamine synthetase (GS) isoform was determined by Native PAGE and the activity staining as well as Western blotting. The activity changes of GS, NADH dependent glutamate synthase (NADH GOGAT), and NADH...The change of glutamine synthetase (GS) isoform was determined by Native PAGE and the activity staining as well as Western blotting. The activity changes of GS, NADH dependent glutamate synthase (NADH GOGAT), and NADH dependent glutamate dehydrogenase (NADH GDH) were also analyzed by enzyme assay. The results indicateded that only one form of GS isozyme was detected during the germination of cushaw seed and the different development stages of the cotyledon grown in light or in darkness. GS activity was increaseed with the germination of the seed untill the cotyledon to begin green and then was reduced gradually. The tendency of the activity change of NADH GOGAT was similar to GS. The activity change of NADH GDH was contrary to that of GS and NADH GOGAT. The results suggested that the expression of GS isoform was not effected by the treatments of light and darkness in the experiment conditions. GS/GOGAT cycle may play a main role for assimilating ammonium during the germination of the seeds and the initial stage of the cotyledon development, and the cycle was weaken and GDH pathway was strengthened after the green of the cotyledon by comparing these enzyme activities.展开更多
The uptodate advances of genomic in situ hybridization (GISH) for last ten years are reviewed in the article. These methods initially deriving from animal research have been developed in plant study, such as Multicolo...The uptodate advances of genomic in situ hybridization (GISH) for last ten years are reviewed in the article. These methods initially deriving from animal research have been developed in plant study, such as Multicolor Fluorescence in situ Hybridization (McFISH), Third strand in situ Hybridization (TISH), Comparative Genomic Hybridization (CGH) and Simultaneous in situ Hybridization. GISH applied widely in plant can reveal the species origin and evolution and determine the truth of distant hybrid containing foreign chromatin. Also it can research the chromosome behaviour including B chromosome and explore the genomic mapping and genic function. Finally the applicability and resolving power of GISH about taxonomic distance, genomic size and the length of chromosome fragment are discussed, as well as the future and the status of GISH in plant.展开更多
文摘The change of glutamine synthetase (GS) isoform was determined by Native PAGE and the activity staining as well as Western blotting. The activity changes of GS, NADH dependent glutamate synthase (NADH GOGAT), and NADH dependent glutamate dehydrogenase (NADH GDH) were also analyzed by enzyme assay. The results indicateded that only one form of GS isozyme was detected during the germination of cushaw seed and the different development stages of the cotyledon grown in light or in darkness. GS activity was increaseed with the germination of the seed untill the cotyledon to begin green and then was reduced gradually. The tendency of the activity change of NADH GOGAT was similar to GS. The activity change of NADH GDH was contrary to that of GS and NADH GOGAT. The results suggested that the expression of GS isoform was not effected by the treatments of light and darkness in the experiment conditions. GS/GOGAT cycle may play a main role for assimilating ammonium during the germination of the seeds and the initial stage of the cotyledon development, and the cycle was weaken and GDH pathway was strengthened after the green of the cotyledon by comparing these enzyme activities.
文摘The uptodate advances of genomic in situ hybridization (GISH) for last ten years are reviewed in the article. These methods initially deriving from animal research have been developed in plant study, such as Multicolor Fluorescence in situ Hybridization (McFISH), Third strand in situ Hybridization (TISH), Comparative Genomic Hybridization (CGH) and Simultaneous in situ Hybridization. GISH applied widely in plant can reveal the species origin and evolution and determine the truth of distant hybrid containing foreign chromatin. Also it can research the chromosome behaviour including B chromosome and explore the genomic mapping and genic function. Finally the applicability and resolving power of GISH about taxonomic distance, genomic size and the length of chromosome fragment are discussed, as well as the future and the status of GISH in plant.
