Qiu-Xiang Fu's research while affiliated with Fujian Agriculture and Forestry University and other places

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Publications (3)

Fig. 2. Effects of Al treatment on the contents of starch (A-B), glucose (C-D), fructose (E-F), sucrose (G-H) in the roots and leaves of C. sinensis and C. grandis. Bars above the boxes represent means ± SE (n = 5). Different letters in the panel the bars indicate a significant difference at P < 0.05.
Fig. 3. Effects of Al treatment on the contents of GA (A), ABA (B) and CTK (C) in the leaves of C. sinensis and C. grandis. Bars above the boxes represent means ± SE (n = 3). Different letters in the panel indicate a significant difference at P < 0.05.
Fig. 4. Effects of Al treatment on the enzyme activity of HMGR (A), DXR (B), DXS (C), IPT (D), PSY (E), GA20ox (F), NCED (G), GA2ox (H) in the leaves of C. sinensis and C. grandis. Bars represent means ± SE (n = 3). Different letters in the panel indicate a significant difference at P < 0.05.
Fig. 5. CoA matrix (A), score and loading plot of first two PCs of PCA for parameters related to isoprenoid metabolism in C. sinensis and C. grandis leaves.
Effects of Al treatment on the volatilization rate of isoprene and monoterpene in the leaves of C. sinensis and C. grandis.
Effects of aluminum (Al) stress on the isoprenoid metabolism of two Citrus species differing in Al-tolerance
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June 2024

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Ecotoxicology and Environmental Safety

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Yan-Yu Wang

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Xiao-Ying Chen

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Isoprenoid metabolism and its derivatives took part in photosynthesis, growth regulation, signal transduction, and plant defense to biotic and abiotic stresses. However, how aluminum (Al) stress affects the isoprenoid metabolism and whether isoprenoid metabolism plays a vital role in the Citrus plants in coping with Al stress remain unclear. In this study, we reported that Al-treatment-induced alternation in the volatilization rate of monoterpenes (α-pinene, β-pinene, limonene, α-terpinene, γ-terpinene and 3-carene) and isoprene were different between Citrus sinensis (Al-tolerant) and C. grandis (Al-sensitive) leaves. The Al-induced decrease of CO 2 assimilation, maximum quantum yield of primary PSII photochemistry (F v /F m), the lower contents of glucose and starch, and the lowered activities of enzymes involved in the mevalonic acid (MVA) pathway and 2-C-methyl-D-erythritol 4-phosphate (MEP) pathway might account for the different volatilization rate of isoprenoids. Furthermore, the altered transcript levels of genes related to isoprenoid precursors and/or derivatives metabolism , such as geranyl diphosphate (GPP) synthase (GPPS) in GPP biosynthesis, geranylgeranyl diphosphate synthase (GGPPS), chlorophyll synthase (CHS) and GGPP reductase (GGPPR) in chlorophyll biosynthesis, limonene synthase (LS) and α-pinene synthase (APS) in limonene and α-pinene synthesis, respectively, might be responsible for the different contents of corresponding products in C. grandis and C. sinensis. Our data suggested that isoprenoid metabolism was involved in Al tolerance response in Citrus, and the alternation of some branches of isoprenoid metabolism could confer different Al-tolerance to Citrus species.

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