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Biochemistry and transcriptome analyses reveal key genes and pathways involved in high-aluminum stress response and tolerance in hydrangea sepals

文献类型： 外文期刊

作者： Chen, Shuangshuang 1 ; Qi, Xiangyu 1 ; Feng, Jing 1 ; Chen, Huijie 1 ; Qin, Ziyi 1 ; Wang, Huadi 1 ; Deng, Yanming 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Leisure Agr, Jiangsu Prov Key Lab Genet & Improvement Hort Crop, Nanjing 210014, Peoples R China

2.Nanjing Agr Univ, Coll Hort, Nanjing 210014, Peoples R China

3.Jiangsu Univ, Sch Life Sci, Zhenjiang 212013, Peoples R China

4.Jiangsu Acad Agr Sci, Inst Leisure Agr, 50 Zhongling St, Nanjing 210014, Jiangsu, Peoples R China

关键词： Hydrangea macrophylla; Aluminum stress; Transcriptome analysis; WGCNA

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：5.437； 五年影响因子：5.731 ）

ISSN： 0981-9428

年卷期： 2022 年 185 卷

页码：

收录情况： SCI

摘要： Hydrangea [Hydrangea macrophylla (Thunb.) Ser.] is a high aluminum-tolerant ornamental plant species, which has a specific characteristic of color change, ie. some cultivars' floral color will change from red to blue or blueviolet planted in acidic soil containing aluminum. This study aims to understand the complex molecular mechanisms of floral color change under Al stress, through comparative biochemistry and transcriptome analyses between an Al3+-sensitive cultivar 'Bailer' and insensitive cultivar 'Ruby' under Al-stress. The results of biochemistry analysis showed that 'Bailer' displayed higher contents of Al3+ and delphinium-3-O-glucoside than that of 'Ruby' after Al2(SO4)3 treating. Meanwhile, the transcriptome analysis of different tissues identified 12,321 differentially expressed genes (DEGs) in 'Bailer' and 6,703 in 'Ruby'. Transcriptome analysis showed that changes in genes' expression pattern in several genes and pathways [such as including metal transporters, reactive oxygen species (ROS) scavenging enzyme, plant hormone signal transduction and favonoid biosynthesis pathway] were the key contributors to the Al3+-sensitive cultivar 'Bailer'. Besides, gene co-expression network analysis (WGCNA) demonstrated that five hub genes, including ABC transporters (TRINITY_DN1053_c0_g1, TRINITY_DN3377_c0_g2), cationic amino acid transporter (TRINITY_DN9684_c0_g2), oligopeptide transporter (TRINITY_DN1147_c0_g2) and flavonol synthase (TRINITY_DN15902_c0_g1), played vital roles in the networks regulating Al tolerance in hydrangea. Furthermore, HmABCI17 ' s (TRINITY_DN1053_c0_g1) expression enhanced Al tolerance in yeast. The conclusions of this study are helpful to elucidate the differences and molecular mechanisms of different hydrangea cultivars on Al tolerance, and provide new insights into molecular assistedscreening for breeding blue flowers in hydrangea and other ornamental plants.

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