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- 저자 : Deng Qunxian (검색결과 1 건)
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Wang Yang,Song Guoying,Liang Dong,Xia Hui,Zhang Huifen,Luo Xian,Deng Qunxian 한국원예학회 2022 Horticulture, Environment, and Biotechnology Vol.63 No.5
Jujube fruits contain high levels of ascorbic acid (AsA). However, the AsA contents of fruits differ significantly in various jujube germplasm resources, and the factors responsible for these differences remain unknown. To explore the metabolic mechanism of AsA accumulation, we investigated the AsA content in fruits at different developmental stages of two jujube species, Ziziphus acidojujuba cv. Yuanxingxiaosuanzao (SZ) and Ziziphus jujuba Mill. cv. Luojiangtiaoyuanzao (LZ). The AsA accumulation pattern in the fruits of the two jujube species was similar during fruit development, and AsA content was negatively correlated with titratable acid. We also analysed the expression patterns of AsA metabolism genes. The results showed that AsA biosynthesis in jujube fruits was mainly related to the L-galactose pathway, as well as the inositol pathway. Furthermore, higher expression levels of genes involved in AsA biosynthesis (GME1, GMP1, GPP, GGP, and MIOX1) and regeneration (MDHAR1 and MDHAR2) were associated with higher AsA concentrations in SZ fruit compared with LZ fruit. In summary, we concluded that more efficient AsA biosynthesis and regeneration was responsible for the higher AsA accumulation in SZ fruit.
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