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Effects of high temperatures on UV-B/visible irradiation induced postharvest anthocyanin accumulation in 'Yunhongli No. 1' (Pyrus pyrifolia Nakai) pears

文献类型： 外文期刊

作者： Zhang, Dong 1 ; Yu, Bo 1 ; Bai, Jinhe 2 ; Qian, Minjie 1 ; Shu, Qun 3 ; Su, Jun 3 ; Teng, Yuanwen 1 ;

作者机构： 1.Zhejiang Univ, Dept Hort, Stare Agr Minist, Key Lab Hort Plant Growth Dev & Qual Improvement, Hangzhou 310058, Zhejiang, Peoples R China

2.ARS, Citrus & Subtrop Prod Lab, USDA, Winter Haven, FL 33881 USA

3.Yunnan Acad Agr Sci, Inst Hort, Kunming 650205, Peoples R China

关键词： Pyrus pyrifolia;Anthocyanin;Fruit coloration;Gene expression;UV-B/visible irradiation;Temperature

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2012 年 134 卷

页码：

收录情况： SCI

摘要： Red Chinese sand pears (Pyrus pyrifolla Nakai) have seen increased cultivation in China in recent years. prized for their attractive market value and nutritional benefits. However, poor fruit coloration has been a noticeable problem. Postharvest ultraviolet-B (UV-B)/visible irradiation has been used to improve anthocyanin accumulation and thus the coloration of fruit skin in apple and other fruits. In this study, the efficacy of UV-B/visible irradiation was evaluated under high- (27 degrees C) and low-temperature (17 degrees C) conditions using red Chinese sand pear 'Yunhongli No. l' as a model. The results showed that UV-B/visible irradiation was more effective in inducing anthocyanin synthesis in peel tissues and improving fruit coloration at 27 degrees C than at 17 degrees C. PAL activity was markedly higher at 27 degrees C than at 17 degrees C. Expression of PyMYB10 and five anthocyanin structural genes, PpPAL, PpCHI, PpCHS, PpF3H, and PpANS, was also higher in fruit irradiated at 27 degrees C than in fruit irradiated at 17 degrees C. For PpUFGT, transcription reached a maximum at 48 and 240 h after the onset of irratiation at 27 degrees C and 17 degrees C, respectively, but the peak value was lower at 27 degrees C than at 17 degrees C. There was no difference in expression of PpDFR between 17 degrees C and 27 degrees C irradiation temperatures. These results indicated that high temperatures (27 degrees C) enhanced UV-B/visible irradiation induced postharvest anthocyanin accumulation in 'Yunhongli No. l' pears by up-regulating PyMYB10 and anthocyanin structural genes and increasing the activity of phenylalanine ammonia-lyase. ID (C) 2011 Elsevier B.V. All rights reserved.

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