文献类型： 外文期刊

作者： Liu, Tengfei ¹ ; Wu, Qiaoyu ² ; Zhou, Shuai ² ; Xia, Junhui ³ ; Yin, Wang ² ; Deng, Lujun ² ; Song, Botao ³ ; He, Tianjiu ² ;

作者机构： 1.Shandong Agr Univ, Coll Food Sci & Engn, Tai An 271018, Peoples R China

2.Minist Agr & Rural Affairs, Guizhou Acad Agr Sci, Key Lab Crop Genet Resources & Germplasm Innovat K, Guizhou Key Lab Agr Biotechnol,Inst Biotechnol, Guiyang 550025, Peoples R China

3.Huazhong Agr Univ, Potato Engn & Technol Res Ctr Hubei Prov, Natl Key Lab Germplasm Innovat & Utilizat Hort Cro, Coll Hort & Forestry Sci,Key Lab Potato Biol & Bio, Wuhan 430070, Peoples R China

关键词： Solanum tuberosum; potato sprouting; abiotic stress; transcriptome; transcription factor; apical bud meristems

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.6； 五年影响因子：6.2 ）

ISSN： 1661-6596

年卷期： 2024 年 25 卷 3 期

页码：

收录情况： SCI

摘要： Climate change-induced heat stress (HS) increasingly threatens potato (Solanum tuberosum L.) production by impacting tuberization and causing the premature sprouting of tubers grown during the hot season. However, the effects of post-harvest HS on tuber sprouting have yet to be explored. This study aims to investigate the effects of post-harvest HS on tuber sprouting and to explore the underlying transcriptomic changes in apical bud meristems. The results show that post-harvest HS facilitates potato tuber sprouting and negates apical dominance. A meticulous transcriptomic profiling of apical bud meristems unearthed a spectrum of differentially expressed genes (DEGs) activated in response to HS. During the heightened sprouting activity that occurred at 15-18 days of HS, the pathways associated with starch metabolism, photomorphogenesis, and circadian rhythm were predominantly suppressed, while those governing chromosome organization, steroid biosynthesis, and transcription factors were markedly enhanced. The critical DEGs encompassed the enzymes pivotal for starch metabolism, the genes central to gibberellin and brassinosteroid biosynthesis, and influential developmental transcription factors, such as SHORT VEGETATIVE PHASE, ASYMMETRIC LEAVES 1, SHOOT MERISTEMLESS, and MONOPTEROS. These findings suggest that HS orchestrates tuber sprouting through nuanced alterations in gene expression within the meristematic tissues, specifically influencing chromatin organization, hormonal biosynthesis pathways, and the transcription factors presiding over meristem fate determination. The present study provides novel insights into the intricate molecular mechanisms whereby post-harvest HS influences tuber sprouting. The findings have important implications for developing strategies to mitigate HS-induced tuber sprouting in the context of climate change.