Journal
PLANTS-BASEL
Volume 11, Issue 22, Pages -Publisher
MDPI
DOI: 10.3390/plants11223067
Keywords
Ouercus ilex; multiomics; integrative approach; drought; proteomics; metabolomics; transcriptomics; DIABLO; PCA
Categories
Funding
- Spanish Ministry of Economy and Competitiveness [ENCINOMICS-2 PID2019-109038RB-I00]
- Youth Employment Operational Program [EJI-17-AGR-164]
- Regional Government of Andalusia
- European Social Fund (ESF)
- Spanish Ministry of Science, Innovation and Universities [IJC2018-035272-I, RYC-2017-23706, FJCI-2017-31613]
- Regional Government of Asturias, Spain [BP17-112]
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The integrated analysis of different omic layers can provide new knowledge and validate regulatory mechanisms of gene expression. This study validated the application of this approach to non-model species and identified the key roles of protein homeostasis and transcriptional control in the early response to drought.
The integrated analysis of different omic layers can provide new knowledge not provided by their individual analysis. This approach is also necessary to validate data and reveal post-transcriptional and post-translational mechanisms of gene expression regulation. In this work, we validated the possibility of applying this approach to non-model species such as Quercus ilex. Transcriptomics, proteomics, and metabolomics from Q. ilex seedlings subjected to drought-like conditions under the typical summer conditions in southern Spain were integrated using a non-targeted approach. Two integrative approaches, PCA and DIABLO, were used and compared. Both approaches seek to reduce dimensionality, preserving the maximum information. DIABLO also allows one to infer interconnections between the different omic layers. For easy visualization and analysis, these interconnections were analyzed using functional and statistical networks. We were able to validate results obtained by analyzing the omic layers separately. We identified the importance of protein homeostasis with numerous protease and chaperones in the networks. We also discovered new key processes, such as transcriptional control, and identified the key function of transcription factors, such as DREB2A, WRKY65, and CONSTANS, in the early response to drought.
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