Activities, transcript levels, and subcellular localizations of sucrose phosphate synthase, sucrose synthase, and neutral invertase and change in sucrose content during fruit development in pineapple (Ananas comosus)
文献类型： 外文期刊
作者： Zhang, X. M. 1 ; Liu, S. H. 1 ; Du, L. Q. 1 ; Yao, Y. L. 1 ; Wu, J. Y. 2 ;
作者机构： 1.Chinese Acad Trop Agr Sci, South Subtrop Crop Res Inst, Minist Agr, Key Lab Trop Fruit Biol, Zhanjiang 524091, Peoples R China
2.Zhanjiang Presch Educ Coll, Dept Sci Educ, Zhanjiang, Peoples R China
3.Lingnan Normal Univ, Basic Educ Coll, Dept Sci Educ, Zhanjiang, Peoples R China
关键词： Pineapple (Ananas comosus); sucrose metabolism; enzyme activity; transcript levels; subcellular location
期刊名称：JOURNAL OF HORTICULTURAL SCIENCE & BIOTECHNOLOGY （ 影响因子：1.641； 五年影响因子：1.616 ）
ISSN： 1462-0316
年卷期： 2019 年 94 卷 5 期
页码：
收录情况： SCI
摘要： Sucrose phosphate synthase (SPS), sucrose synthase (SuSy), and neutral invertase (NI) are the three enzymes involved in sucrose synthesis and cleavage in higher plants. However, the key enzyme(s) responsible for sucrose accumulation is/are inconsistent in different species or different varieties of the same species. The regulation of sucrose accumulation in Tainung 11 pineapple (Ananas comosus) has not been reported to date. In this study, the sucrose content and the activities and patterns of transcript levels of the three enzymes were analysed in the flesh of Tainung 11 pineapple during fruit development. From 20 to 100 days after anthesis (DAA), the activities and transcript levels of SPS and SuSy gradually increased. Meanwhile, the NI activity and transcript level dramatically decreased from 40 to 100 DAA. The sucrose accumulation increased from 20 to 100 DAA. These findings suggested that AcSPS, SPS, AcSuSy, and SuSy were responsible for sucrose synthesis, but AcNI and NI were responsible for sucrose cleavage in Tainung 11 pineapple. The subcellular localisations of AcSPS, AcSuSy, and AcNI were first identified. Both AcSPS and AcSuSy were found in the cytosol, while AcNI was localised in the vacuole.
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