| Using Red Globe, Christmas Rose, Autumn Black and kyoho as the test material, experiments were conducted from 2003 to 2004 to study the tissue structure, abscission layer growth and physiochemical changes during their storage. The potential results are as follows.1.By comparing the conformation structure of those four species ,we found that: the pulling resistance was in direct proportion with the size of fruit stalk and fruit peduncle, but in indirect ratio with the self-weight of berries. It was also decided by the bulk of brush and the amount of vascular, but was not clearly relativity with the amount of seeds. At the same time, the stress resistance was close related to the size and the arrangement of the pulp cells and the combinative degree between pulp and pericarp, but almost had nothing to do with the thickness of pericarp. The stress resistance and pulling resistance of the hard pulp species were apparently smaller than those of tender pulp species. There were positive correlations between the stress and pulling resistances and the size of berries among the same pulp species. However, there were no relativity between the pulling and stress resistances and the weight of berries among different species. Also, there was no apparent relation between the stress resistance and pulling resistance.2.The dissection structure indicated that, among the different species, the structure of waxiness and pericarp of fruits were significantly different, therefore, the resistance and SO2 susceptibility would be different. The waxiness layer of kyoho was thick and distributed evenly and compacted, so this species had greater resistance to mechanical damage. In addition, its cutin layer, the epidermis and sub-epidermis were thick, and the cells of epidermis and sub-epidermis were compacted, thus it would have strong resistance to SO2 damage. The waxiness layer of Red Globe was relatively thin, and there was much interspace among the waxiness layers, the thickness of the cutin, epidermis and... |
