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Physiological adjustment of pomegranate pericarp responding to sunburn and its underlying molecular mechanisms

文献类型： 外文期刊

作者： Liu, Chunyan 1 ; Su, Ying 1 ; Li, Jiyu 1 ; Jia, Botao 1 ; Cao, Zhen 1 ; Qin, Gaihua 1 ;

作者机构： 1.Anhui Acad Agr Sci, Inst Hort, Key Lab Genet Improvement & Ecophysiol Hort Crops, Hefei 230031, Peoples R China

2.Anhui Acad Agr Sci, Key Lab Fruit Qual & Dev Biol, Hefei 230031, Peoples R China

关键词： Sunburn; Metabolite; Genes; Physiological; Pomegranate

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background Sunburn is common in pomegranate, and sunburned fruits have poor appearance and low marketability. However, the physiological and metabolic responses to sunburn and their underlying molecular mechanisms in pomegranate fruit are little understood. Fruit of sunburn-sensitive cultivar 'Hongyushizi' was used to carry out physiological parameter detection and widely-targeted metabolomics and transcriptome study. Results Malondialdehyde and relative conductivity increased with the severity of sunburn, which indicated increased membrane injury. Meanwhile, the content of antioxidants (total phenols and flavonoids), which reduce and repair membrane damage, increased and were accompanied by increases in total antioxidant capacity. In sunburned fruits compared with controls, 129 metabolites changed (including naringenin, pelargonidin and kaempferol) and 447 differentially expressed genes including CHI (Pgr25966.1), F3 ' 5 ' H (Pgr26644.1), and CHS (Pgr005566.1) may have contributed to these changes. Transcription factors, such as NAC 5 (Pgr008725.1), MYB 93 (Pgr001791.1), and MYB 111 (Pgr027973.1) may be involved in phenylpropanoid and flavonoid biosynthesis by regulating the CHI, F3 ' 5 ' H, and CHS etc. Conclusions These findings provide insight into the sunburn mechanisms of pomegranate, and also into the genetic improvement of fruit sunburn.

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