Dataset Information

Novel drought adaptation strategies identified by comparing organelle- and cytoplasmic-enriched protein profiles of two Sorghum bicolor genotypes (RTx430 and BTx642) with differing pre-flowering drought tolerance

ABSTRACT: Proteomics of organelle and cytoplasmic enriched samples from Sorghum bicolor RTx430 (pre-flowering drought tolerant) and RTx642 (pre-flowering drought sensitive) before and during drought. 3 biological replicates, except BTx642 drought samples, which had 2 biological replicates due to limited sample. Identified multiple protein-level responses in both genotypes, demonstrated that these responses are consistent with the literature, as well as identified multiple RTx430-specific changes that suggest novel drought-tolerance strategies unique to RTx430. Sorghum leaves (both genotypes, +/- drought) were separated into cytosolic and organelle fractions, then digested with trypsin, and analyzed by LC-MS/MS. Data was searched using MaxQuant's Andromeda and a UniProt database. Data was then evaluated for missingness, normalized, and missing values imputed using Bioconductor R package DEP (Zhang et al. 2018).

INSTRUMENT(S): Q Exactive Plus

ORGANISM(S): Sorghum Bicolor (ncbitaxon:4558)

SUBMITTER: Pubudu P. Handakumbara

PROVIDER: MSV000086332 | MassIVE | Mon Oct 19 14:10:00 BST 2020

SECONDARY ACCESSION(S): PXD022082

REPOSITORIES: MassIVE

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Publications

Distinct Preflowering Drought Tolerance Strategies of <i>Sorghum bicolor</i> Genotype RTx430 Revealed by Subcellular Protein Profiling.

Ogden Aaron J AJ Abdali Shadan S Engbrecht Kristin M KM Zhou Mowei M Handakumbura Pubudu P PP

International journal of molecular sciences 20201219 24

Drought is the largest stress affecting agricultural crops, resulting in substantial reductions in yield. Plant adaptation to water stress is a complex trait involving changes in hormone signaling, physiology, and morphology. Sorghum (<i>Sorghum bicolor</i> (L.) Moench) is a C4 cereal grass; it is an agricultural staple, and it is particularly drought-tolerant. To better understand drought adaptation strategies, we compared the cytosolic- and organelle-enriched protein profiles of leaves from tw ...[more]

PMID: 33352693

Similar Datasets

Project description:Background: Drought stress is the major environmental stress that affects plant growth and productivity. It triggers in plants a wide range of responses detectable at different scales: molecular, biochemical and physiological levels. At the molecular level the response to drought stress results in the differential expression of several metabolic pathways. For this reason, explore the subtle differences existing in gene expression of drought sensitive and drought tolerant genotypes allows to identify drought-related genes that could be used for selection of drought tolerance traits. Genome-wide RNA-Seq technology was used to compare the drought response of two sorghum genotypes characterized by contrasting water use efficiency. Results: the physiological measurements carried out confirmed the drought sensitivity of IS20351 and the drought tolerance of IS22330 previously studied. The expression of drought-related genes was more abundant in the sensitive genotype IS20351 compared to the tolerant IS22330. The Gene Ontology enrichment highlighted a massive increase in transcript abundance in “response to stress” and “abiotic stimulus”, “oxidation-reduction reaction” in the sensitive genotype IS20351 under drought stress. “Antioxidant” and “secondary metabolism”, “photosynthesis and carbon fixation process”, “lipids” and “carbon metabolism” were the pathways most affected by drought in the sensitive genotype IS20351. The sensitive genotype IS20351 showed under well-watered conditions a lower constitutive expression level of “secondary metabolic process” (GO:0019748) and “glutathione transferase activity” (GO:000004364). Conclusions: RNA-Seq analysis revealed to be a very useful tool to explore differences between sensitive and tolerant sorghum genotypes. The transcriptomic results supported all the physiological measurements and were crucial to clarify the tolerance of the two genotypes studied. The connection between the differential gene expression and the physiological response to drought states unequivocally the drought tolerance of the genotype IS22330 and the strategy adopted to cope with drought stress.