Transcriptome analysis reveals dual action of salicylic acid application in the induction of flowering in Malus domestica
文献类型： 外文期刊
作者： Shah, Kamran 1 ; Wang, Mengxue 1 ; Li, Xiaolong 2 ; Shang, Wei 1 ; Wang, Shujin 1 ; Han, Mingyu 1 ; Ren, Xiaolin 1 ; Tian, Jianwen 2 ; An, Na 1 ; Xing, Libo 1 ;
作者机构： 1.Northwest Agr & Forestry Univ, Coll Hort, Yangling 712100, Shaanxi, Peoples R China
2.Ningxia Acad Agr & Forestry Sci, Inst Hort, Yinchuan, Peoples R China
关键词： Apple; Agamous; Flowering; Malus domestica; Salicylic acid; Squamosa
期刊名称：PLANT SCIENCE （ 影响因子：5.363； 五年影响因子：5.454 ）
ISSN： 0168-9452
年卷期： 2022 年 324 卷
页码：
收录情况： SCI
摘要： In the apple tree, insufficient flower bud production is an intractable challenge, and very little information is available in this field due to the fact that research done in this sector is very rare owing to its extended life cycles and low rate of genetic transformation. Here we display novel changes and events in spur buds of Malus x domestica trees after they were exposed to salicylic acid (SA) treatment during the flower induction period. We found a significant increase in morphological indexes, followed by a wider and well-defined shoot apical meristem in SA-treated spur buds. Additionally, we observed increased oxidative stress markers and enzymatic antioxidants in control-treated buds during the flower induction period, while non-enzymatic antioxidants were recorded higher in SA-treated buds. Maximum flowering was observed in SA-treated trees in the next year. Furthermore, ultra-high-performance liquid chromatography (u-HPLC) analysis displays that SA treatment enhances SA and indole acetic acid (IAA), while having an antagonistic effect on gibberellin (GA). At different time points, transcriptome analysis was conducted to analyze the transcriptional response of CK and SA treated buds. Pathway enrichment was detected in differentially expressed genes (DEGs). Agamous (AGL) and SQUAMOSApromoter binding protein-like (SPL) family related flowering genes display a positive signal for the increased flowering in SA-treated trees, which confirms our findings. As far as we know, there is no report available on the response of spur buds to SA treatment during the flower induction period. This data provides a new theoretical reference for the management of apple tree flowering and also provides an essential basis for future analysis of the regulation and control of flowering in M. domestica.
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