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- Title
Comparative Analysis of the Brassica napus Root and Leaf Transcript Profiling in Response to Drought Stress.
- Authors
Chunqing Liu; Xuekun Zhang; Ka Zhang; Hong An; Kaining Hu; Jing Wen; Jinxiong Shen; Chaozhi Ma; Bin Yi; Jinxing Tu; Tingdong Fu
- Abstract
Drought stress is one of the major abiotic factors affecting Brassica napus (B. napus) productivity. In order to identify genes of potential importance to drought stress and obtain a deeper understanding of the molecular mechanisms regarding the responses of B. napus to dehydration stress, we performed large-scale transcriptome sequencing of B. napus plants under dehydration stress using the Illumina sequencing technology. In this work, a relatively drought tolerant B. napus line, Q2, identified in our previous study, was used. Four cDNA libraries constructed from mRNAs of control and dehydration-treated root and leaf were sequenced by Illumina technology. A total of 6018 and 5377 differentially expressed genes (DEGs) were identified in root and leaf. In addition, 1745 genes exhibited a coordinated expression profile between the two tissues under drought stress, 1289 (approximately 74%) of which showed an inverse relationship, demonstrating different regulation patterns between the root and leaf. The gene ontology (GO) enrichment test indicated that up-regulated genes in root were mostly involved in "stimulus" "stress" biological process, and activated genes in leaf mainly functioned in "cell" "cell part" components. Furthermore, a comparative network related to plant hormone signal transduction and AREB/ABF, AP2/EREBP, NAC, WRKY and MYC/MYB transcription factors (TFs) provided a view of different stress tolerance mechanisms between root and leaf. Some of the DEGs identified may be candidates for future research aimed at detecting drought-responsive genes and will be useful for understanding the molecular mechanisms of drought tolerance in root and leaf of B. napus.
- Subjects
BRASSICA; COMPARATIVE studies; BRASSICACEAE; DROUGHTS; ABIOTIC stress; ABIOTIC environment
- Publication
International Journal of Molecular Sciences, 2015, Vol 16, Issue 8, p18752
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms160818752