PpSGRs Responsed to Blue Light and Affect Carotenoids Accumulation in Postharvest Yellow-flesh Peach Fruit

doi:10.16420/j.issn.0513-353x.2017-0562

ACTA HORTICULTURAE SINICA ›› 2018, Vol. 45 ›› Issue (2): 229-238.doi: 10.16420/j.issn.0513-353x.2017-0562

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PpSGRs Responsed to Blue Light and Affect Carotenoids Accumulation in Postharvest Yellow-flesh Peach Fruit

SHEN Ziming^1,2，XU Liwei²，SHI Liyu²，CHEN Wei²，and YANG Zhenfeng^2,*

¹College of Food Science and Technology，Shanghai Ocean University，Shanghai 201306，China；²College of Biological and Environmental Sciences，Zhejiang Wanli University，Ningbo，Zhejiang315100，China

Online:2018-02-25 Published:2018-02-25

Abstract

Abstract:

In order to explore the mechanism of blue light promoting carotenoids accumulation in postharvest peaches（‘Jinli’，yellow-flesh），PpSGR1 and PpSGRL were identified based on peach genome and analyzed by bioinformatics. Furthermore，the expression profile of PpSGR1 and PpSGRL in different tissues and developmental fruits and the effects of blue light treatment（40 μmol · m^-2 · s^-1） on PpSGR1 and PpSGRL expression were investigated in‘Jinli’peach fruit during storage. Results showed that PpSGR1 possessed cysteine-rich motif and belonged to STAY GREEN subfamily，while PpSGRL belonged to STAY GREEN-like subfamily due to the mutation of cysteine-rich motif in C-terminal. PpSGR1 and PpSGRL both contained a chloroplast transit peptide in their N-terminal，and shared high similarity homology with Prunus mume. Expression pattern of PpSGR1 and PpSGRL differed significantly in peach

tissues and developmental fruit，especially the expression of PpSGR1 was closely related to carotenoids accumulation in peach fruit. Blue light treatment suppressed PpPIF3 and resulted in a rapid depression of PpSGR1 expression，but up-regulated the transcription level of PpPSY，and promoted carotenoids accumulation in postharvest peaches during first 6 days storage. Meanwhile，blue light promoted ethylene production in postharvest peaches which up-regulated expression of PpSGR1，and resulted in the PpPSY repression and carotenoids accumulation.

Key words: peach, fruit, yellow-flesh, blue light, carotenoid, STAY GREEN, phytochrome- interacting factor

CLC Number:

S 662.1

SHEN Ziming1,2，XU Liwei2，SHI Liyu2，CHEN Wei2，and YANG Zhenfeng2,*. PpSGRs Responsed to Blue Light and Affect Carotenoids Accumulation in Postharvest Yellow-flesh Peach Fruit[J]. ACTA HORTICULTURAE SINICA, 2018, 45(2): 229-238.

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PpSGRs Responsed to Blue Light and Affect Carotenoids Accumulation in Postharvest Yellow-flesh Peach Fruit

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