Dataset Information

Shotgun proteomic analysis of embryonic axis of soybean seeds during germination under salt stress

ABSTRACT: Salinity is one of the main environmental stresses worldwide limiting soybean growth and yield. Seed imbibition and radical emergence are generally less affected by salinity in soybean. Towards unraveling the mechanisms underlying salt tolerance in soybean at germination stage, a comprehensive quantitative proteomic analysis of proteins from soybean embryonic axis during germination sensu stricto (GSS) under saline conditions was performed. Application of 100 and 200 mmol L-1 NaCl at GSS was significantly accompanied by the change in abundance (>2-fold) of 97 and 75 proteins, respectively. Most of these proteins were involved in three major functions, namely stress response and defense, protein turnover and protection and primary metabolism. Our results pave the way towards the identification of suitable biomarkers useful for improving salt tolerance in soybean.

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Glycine Max

TISSUE(S): Embryonic Axis

SUBMITTER: Riccardo Zenezini Chiozzi

LAB HEAD: Aldo Laganà

PROVIDER: PXD001943 | Pride | 2015-04-07

REPOSITORIES: Pride

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Shotgun proteomic analysis of soybean embryonic axes during germination under salt stress.

Fercha Azzedine A Capriotti Anna Laura AL Caruso Giuseppe G Cavaliere Chiara C Stampachiacchiere Serena S Zenezini Chiozzi Riccardo R Laganà Aldo A

Proteomics 20160413 10

Seed imbibition and radicle emergence are generally less affected by salinity in soybean than in other crop plants. In order to unveil the mechanisms underlying this remarkable salt tolerance of soybean at seed germination, a comparative label-free shotgun proteomic analysis of embryonic axes exposed to salinity during germination sensu stricto (GSS) was conducted. The results revealed that the application of 100 and 200 mmol/L NaCl stress was accompanied by significant changes (>2-fold, P<0.05) ...[more]

PMID: 26969838

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Project description:Arabidopsis ecotypes of Sha and Ler showed differences in tolerance to salinity stress. A previous study indicated that a premature stop codon resulting in a truncated Response to ABA and Salt 1 (RAS1) protein in Sha contributes to the increased salt tolerance relative to Ler ecotype. Sha exhibited higher germination rates and longer roots on MS plate, presumably due to the decreased ABA sensitivity in Sha. More Sha plants also survived in soil after salt treatment with relatively lower electrolyte leakage when compared to Ler. Transcriptome analysis revealed that expression levels of many genes were changed between Sha and Ler ecotypes and by salt treatments. About 500 transcripts were commonly changed by at least one salinity effect and one ecotype effect, and 171 of them were co-regulated by all four comparisons. Transcripts involved in redox, secondary metabolism, auxin metabolism, photosynthesis, cell wall, and protein synthesis were mainly down-regulated by salinity effects, while transposable element genes, microRNA and antisense sequences, histone superfamily genes, and biotic stress related genes were significantly changed by Sha ecotype effects and only slightly by salinity. Several metabolic pathways such as stress, TCA, hormone/lipid/secondary metabolism, redox, development, and GO terms involved in stress, oxidation, and defense response were enriched by both salinity and ecotype effects. Ninety-five highly inducible genes were identified as candidates of RAS1 target genes and the functions involved hormone metabolism, biotic stress, RNA, DNA synthesis, protein metabolism, cell, and microRNA metabolism. All these results indicated that the Sha ecotype was possibly preconditioned to abiotic stress relative to Ler through regulation of signaling pathways and stress responsive gene expression. These comparative transcriptomic and analytical results also confirm the complexity of ABA responses and salt stress tolerance mechanisms, and they suggest additional targets for improving tolerance.

			Action	DRS
	GLYCINE.fasta	Fasta
	Soybean_100mM_1_01.raw	Raw
	Soybean_100mM_1_02.raw	Raw
	Soybean_100mM_1_03.raw	Raw
	Soybean_100mM_2_01.raw	Raw