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Comparative Transcriptome Analysis Reveals the Effect of Lignin on Storage Roots Formation in Two Sweetpotato (Ipomoea batatas (L.) Lam.) Cultivars

文献类型： 外文期刊

作者： Du, Taifeng 1 ; Qin, Zhen 1 ; Zhou, Yuanyuan 1 ; Zhang, Lei 2 ; Wang, Qingmei 1 ; Li, Zongyun 2 ; Hou, Fuyun 1 ;

作者机构： 1.Shandong Acad Agr Sci, Crop Res Inst, Sci Observing & Expt Stn Tuber & Root Crops Huang, Minist Agr & Rural Affairs, Jinan 250100, Peoples R China

2.Jiangsu Normal Univ, Sch Life Sci, Key Lab Phylogeny & Comparat Genom Jiangsu Prov, Xuzhou 221116, Peoples R China

关键词： sweetpotato; storage root; transcriptome; lignin synthesis; transcription factors

期刊名称：GENES （ 影响因子：3.5； 五年影响因子：3.9 ）

ISSN：

年卷期： 2023 年 14 卷 6 期

页码：

收录情况： SCI

摘要： Sweet potato (Ipomoea batatas (L.) Lam.) is one of the most important crops with high storage roots yield. The formation and expansion rate of storage root (SR) plays a crucial role in the production of sweet potato. Lignin affects the SR formation; however, the molecular mechanisms of lignin in SR development have been lacking. To reveal the problem, we performed transcriptome sequencing of SR harvested at 32, 46, and 67 days after planting (DAP) to analyze two sweet potato lines, Jishu25 and Jishu29, in which SR expansion of Jishu29 was early and had a higher yield. A total of 52,137 transcripts and 21,148 unigenes were obtained after corrected with Hiseq2500 sequencing. Through the comparative analysis, 9577 unigenes were found to be differently expressed in the different stages in two cultivars. In addition, phenotypic analysis of two cultivars, combined with analysis of GO, KEGG, and WGCNA showed the regulation of lignin synthesis and related transcription factors play a crucial role in the early expansion of SR. The four key genes swbp1, swpa7, IbERF061, and IbERF109 were proved as potential candidates for regulating lignin synthesis and SR expansion in sweet potato. The data from this study provides new insights into the molecular mechanisms underlying the impact of lignin synthesis on the formation and expansion of SR in sweet potatoes and proposes several candidate genes that may affect sweet potato yield.

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