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首页> 外文期刊>生物環境調節 >Regulatory Mechanism of Anthocyanin Biosynthesis in 'Kyoho' Grape Berries Grown under Different Temperature Conditions
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Regulatory Mechanism of Anthocyanin Biosynthesis in 'Kyoho' Grape Berries Grown under Different Temperature Conditions

机译：不同温度条件下'巨峰'葡萄浆果花色苷生物合成的调控机制

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To clarify the mechanism regulating anthocyanin biosynthesis in 'Kyoho' grape berrie grown under high temperature, we examined flavonoids accumulation and the activities of related enzymes as well as photoassimilates translocation on the berries.Anthocyanin content in the skin of berries of grape was lowered at 30 days after veraison when grown under high temperature condition (at consistently 30°C) as compared with berries at consistently 25°C or 30°C in the day and 15°C in the night concomitantly. Phenylalanine concentration in the skin and the photoassimilates partitioning to berry were also lower in those grown at 30°C than vines at 25°C or 30/15°C. While, phenylalanine ammonia lyase (PAL) activity in berries grown at 25°C was higher than that in berries grown at 30°C or 30/15°C. Berries grown at 30/15°C had the highest UDP-glucose: flavonoid 3-0-glucosyltransferase (UFGT) activity among three temperature conditions 30 days after veraison. These results suggest that grape berries grown at successive high temperature decrease anthocyanin accumulation in the skin by virtue of the decrease of the UFGT activities and the concentration of phenylalanine and photoassimilates partitioning to berry. On one hand, the grape berry grown under cool night temperature condition would result in high level of anthocyanin accumulation due possibly to great induction of UFGT activity and high phenylalanine accumulation.
机译：为了阐明调节高温生长的'Kyoho'葡萄品种中花青素生物合成的机制，我们研究了类黄酮的积累，相关酶的活性以及光同化物在浆果上的转运。葡萄皮中花色苷的含量在30时降低了在高温（恒定温度为30°C）下生长后的天数与白天恒定温度为25°C或30°C，夜间恒定温度为15°C的浆果相比。在25°C或30/15°C下生长于30°C的葡萄中，皮肤中的苯丙氨酸浓度和分配给浆果的光同化物的浓度也低于藤本植物。而在25°C下生长的浆果中苯丙氨酸氨裂合酶（PAL）的活性高于在30°C或30/15°C下生长的浆果中的苯丙氨酸氨裂合酶（PAL）活性。在30天后的30个温度条件下，在30/15°C下生长的浆果具有最高的UDP-葡萄糖：类黄酮3-0-葡萄糖基转移酶（UFGT）活性。这些结果表明，在连续高温下生长的葡萄浆果由于UFGT活性的降低以及苯丙氨酸和光同化物分配到浆果中的浓度而减少了皮肤中花色苷的积累。一方面，在凉爽的夜间温度条件下生长的葡萄浆果可能导致花青素的高水平积累，这可能是由于UFGT活性的强烈诱导和苯丙氨酸的高积累。

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