Browsing by Author "Ji, Yang"
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- Combinations of Small RNA, RNA, and Degradome Sequencing Uncovers the Expression Pattern of microRNA–mRNA Pairs Adapting to Drought Stress in Leaf and Root of Dactylis glomerata L.Ji, Yang; Chen, Peilin; Chen, Jing; Pennerman, Kayla K.; Liang, Xiaoyu; Yan, Haidong; Zhou, Sifan; Feng, Guangyan; Wang, Chengran; Yin, Guohua; Zhang, Xinquan; Hu, Yuanbin; Huang, Linkai (MDPI, 2018-10-11)Drought stress is a global problem, and the lack of water is a key factor that leads to agricultural shortages. MicroRNAs play a crucial role in the plant drought stress response; however, the microRNAs and their targets involved in drought response have not been well elucidated. In the present study, we used Illumina platform (https://www.illumina.com/) and combined data from miRNA, RNA, and degradome sequencing to explore the drought- and organ-specific miRNAs in orchardgrass (Dactylis glomerata L.) leaf and root. We aimed to find potential miRNA–mRNA regulation patterns responding to drought conditions. In total, 519 (486 conserved and 33 novel) miRNAs were identified, of which, 41 miRNAs had significant differential expression among the comparisons (p < 0.05). We also identified 55,366 unigenes by RNA-Seq, where 12,535 unigenes were differently expressed. Finally, our degradome analysis revealed that 5950 transcripts were targeted by 487 miRNAs. A correlation analysis identified that miRNA ata-miR164c-3p and its target heat shock protein family A (HSP70) member 5 gene comp59407_c0 (BIPE3) may be essential in organ-specific plant drought stress response and/or adaptation in orchardgrass. Additionally, Gene ontology (GO) and Kyoto encyclopedia of genes and genomes (KEGG) analyses found that “antigen processing and presentation” was the most enriched downregulated pathway in adaptation to drought conditions. Taken together, we explored the genes and miRNAs that may be involved in drought adaptation of orchardgrass and identified how they may be regulated. These results serve as a valuable genetic resource for future studies focusing on how plants adapted to drought conditions.
- Pangenomic analysis identifies structural variation associated with heat tolerance in pearl milletYan, Haidong; Sun, Min; Zhang, Zhongren; Jin, Yarong; Zhang, Ailing; Lin, Chuang; Wu, Bingchao; He, Min; Xu, Bin; Wang, Jing; Qin, Peng; Mendieta, John Pablo; Nie, Gang; Wang, Jianping; Jones, Chris S. S.; Feng, Guangyan; Srivastava, Rakesh K. K.; Zhang, Xinquan; Bombarely, Aureliano; Luo, Dan; Jin, Long; Peng, Yuanying; Wang, Xiaoshan; Ji, Yang; Tian, Shilin; Huang, Linkai (Nature Portfolio, 2023-03)Pearl millet is an important cereal crop worldwide and shows superior heat tolerance. Here, we developed a graph-based pan-genome by assembling ten chromosomal genomes with one existing assembly adapted to different climates worldwide and captured 424,085 genomic structural variations (SVs). Comparative genomics and transcriptomics analyses revealed the expansion of the RWP-RK transcription factor family and the involvement of endoplasmic reticulum (ER)-related genes in heat tolerance. The overexpression of one RWP-RK gene led to enhanced plant heat tolerance and transactivated ER-related genes quickly, supporting the important roles of RWP-RK transcription factors and ER system in heat tolerance. Furthermore, we found that some SVs affected the gene expression associated with heat tolerance and SVs surrounding ER-related genes shaped adaptation to heat tolerance during domestication in the population. Our study provides a comprehensive genomic resource revealing insights into heat tolerance and laying a foundation for generating more robust crops under the changing climate. A graph-based pan-genome constructed using de novo genome assemblies of ten pearl millet accessions adapted to different climates worldwide identifies structural variations and their contribution to heat tolerance in pearl millet.