ABA and UV-C effects on quality, antioxidant capacity and anthocyanin contents of strawberry fruit (Fragaria ananassa Duch.)
ABA and UV-C effects on quality, antioxidant capacity and anthocyanin contents of strawberry fruit (Fragaria ananassa Duch.)
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ABA和UV-C对草莓果实（Fragaria ananassa Duch.）品质、抗氧化能力和花青素含量的影响
DOI：
10.1016/j.postharvbio.2013.12.006
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发表时间：
2014-04-01
影响因子：
7
通讯作者：
Mao, Linchun
中科院分区：
文献类型：
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作者：
Li, Dongdong;Luo, Zisheng;Mao, Linchun
研究了1 mM脱落酸（阿坝）和4.1 kJ/m2 UV-C辐射对20 ℃贮藏下大绿色草莓果实品质、抗氧化能力、花青苷含量和花青苷合成酶活性的影响。结果表明，阿坝促进了颜色形成、硬度下降、可溶性固形物含量和花青苷积累，而UV-C抑制了这些过程。苯丙氨酸氨裂解酶，酪氨酸氨裂解酶和p-香豆酸连接酶的活性立即上调约50%的UV-C辐射，但被抑制，包括二氢黄酮醇4-还原酶，特别是在第3或4天。UV-C辐射对肉桂酸4-羟化酶（C4 H）活性影响不大。阿坝增强了除C4 H以外的花青苷合成酶的活性。说明阿坝对草莓花青苷积累的促进作用与提高生物合成酶活性有关，而UV-C的促进作用较为短暂。此外，C4 H似乎不是草莓花青素合成途径中的限速酶。(C)2013爱思唯尔有限公司版权所有。
Effects of 1 mM abscisic acid (ABA) and 4.1 kJ/m(2) UV-C radiation on quality, antioxidant capacity, anthocyanin contents, and anthocyanin biosynthetic enzyme activities of large green strawberry fruit stored at 20 degrees C were evaluated. Results showed that ABA promoted color formation, firmness decrease, soluble solids content and anthocyanin accumulation while UV-C inhibited these processes. Activities of phenylalanine ammonia-lyase, tyrosine ammonia-lyase and p-coumarate ligase were immediately upregulated by approximately 50% with UV-C radiation but were inhibited, including dihydroflavonol 4-reductase especially on day 3 or 4. UV-C radiation had little effect on activity of cinnamate 4-hydroxylase (C4H). ABA enhanced activities of anthocyanin biosynthetic enzymes except C4H. These data indicated that the stimulatory effect of ABA on strawberry anthocyanin accumulation was related to enhancement of biosynthetic enzyme activities, while the effects of UV-C were more transient. In addition, it appeared that C4H was not a rate-limiting enzyme in the strawberry anthocyanin biosynthesis pathway. (C) 2013 Elsevier B.V. All rights reserved.