雅思TASK1小作文模拟题:科学技术 Technology

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Fruit preservation time and fructescence were important index of fruit economic value. ACC Oxidase (ACO) was an important enzyme and played a crucial role in regulating fruit growth. To study the mechanism that ACO catalyzed ACC to ethylene might be contributed to mark and improve fruits preservation time. Fruit ACO genes data were derived from Actinidia chinensis, Actinidia deliciosa, Vitis vinifera, Malus domestica, Pyrus communis, Pyrus pyrifolia, Prunus persica, Prunus mume, Prunus armeniaca, and Musa ABB. Several aspects of bioinformatics analysis, such as amino acids sequences analysis and chemical properties analysis and phylogenic prediction of them, were conducted. Those fruit trees were grouped together by cluster analysis based on the bioinformatics analysis results. The results of this study were as follows: ⑴ The ACO genes could mark the fruit preservation capability among the plants in a common family. Malus domestica, Prunus persica, Prunus mume, and Prunus armeniaca had the equal fruit preservation capability. Pyrus communis and Pyrus pyrifolia had the equal fruit preservation capability. Actinidia chinensis and Actinidia deliciosa had the equal fruit preservation capability. ⑵ The plants among different genus could be grouped together by the ACO genes. This might be related to both variation on the 18th locus in ACO protein sequence and highly conserved regions in the 2OG-FeII Oxy surperfamily. ⑶ The fruits preservation capability of different plants differed with each other. This might be related to that ACO mechanism was affected by genotype and the outside stimulation sensitivity. The ACO gene was an important function gene: the ACO genes could group the fruit trees among common genus together, and mark the fruits preservation capability.