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首页> 外文期刊>Journal of Experimental Botany >Up- and down-regulation of Fragaria x ananassa O-methyltransferase: impacts on furanone and phenylpropanoid metabolism.
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Up- and down-regulation of Fragaria x ananassa O-methyltransferase: impacts on furanone and phenylpropanoid metabolism.

机译:Fragaria X ananassa O-甲基转移酶的上调和下调:对呋喃酮和苯丙醇丙二醇代谢的影响。

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摘要

A complex mixture of hundreds of substances determines strawberry (Fragaria x ananassa) aroma, but only ~15 volatiles are considered as key flavour compounds. Of these, 4-hydroxy-2,5-dimethyl-3(2H)-furanone (HDMF) is regarded as the most important, but it is methylated further by FaOMT (Fragaria x ananassa O-methyltransferase) to 2,5-dimethyl-4-methoxy-3(2H)-furanone (DMMF) during the ripening process. It is shown here that transformation of strawberry with the FaOMT sequence in sense and antisense orientation, under the control of the cauliflower mosaic virus 35S promoter, resulted in a near total loss of DMMF, whereas the levels of the other volatiles remained unchanged. FaOMT repression also affected the ratio of feruloyl 1-O- beta -D-glucose and caffeoyl 1-O- beta -D-glucose, indicating a dual function of the enzyme in planta. Thus, FaOMT is involved in at least two different biochemical pathways in ripe strawberry fruit..
机译:数百种物质的复杂混合物决定了草莓(Fragaria X ananassa)香气,但仅〜15次挥发物被认为是关键的风味化合物。 其中,4-羟基-2,5-二甲基-3(2H) - 糠(HDMF)被认为是最重要的,但是通过Faomt(Fragaria X ananassa O-甲基转移酶)进一步甲基化至2,5-二甲基 -4-甲氧基-3(2H) - 辉氨酸(DMMF)在成熟过程中。 这里示出了在花椰菜马赛克病毒35s启动子的控制下,在感觉和反义方向上与Faomt序列的转变为Faomt序列,导致DMMF的近极损失,而其他挥发物的水平保持不变。 Faomt抑制还影响了Feruloyl 1-O-Beta -d-葡萄糖和咖啡酰基1-O-β-d-葡萄糖的比例,表明植物中酶的双重功能。 因此,Faomt参与了成熟草莓果实中的至少两种不同的生化途径。

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