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Galactolipid and Phospholipid Profile and Proteome Alterations in Soybean Leaves at the Onset of Salt Stress

ABSTRACT: To explore the adaptive mechanisms of soybean in lipid signalling and remodelling of metabolism following salt stress, lipid profiling was performed on leaves of seedlings from cultivar C08 which is a salt-sensitive variety. In our previous study, C08 seedlings showed leaf drooping at 0.5 h under high salt stress followed by recovery. To study if this phenomenon could be closely linked to the dynamic changes in membrane lipid composition, integrated proteomic and lipidomic analyses were conducted. To address protein function in response to salt, label-free quantitative (LFQ) proteomic analysis on salt-treated soybean seedling leaves was conducted. Our study identified putative enzymes or protein components involved in lipid regulation and provides a comprehensive understanding of lipid remodelling following salt treatment in soybean.

INSTRUMENT(S): Orbitrap Fusion Lumos

ORGANISM(S): Glycine Max

TISSUE(S): Plant Cell, Leaf

DISEASE(S): Disease Free

SUBMITTER: Ailin Liu

LAB HEAD: Hon-Ming Lam

PROVIDER: PXD023092 | Pride | 2021-02-25

REPOSITORIES: Pride

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Project description:Background The homeodomain leucine zipper (HD-Zip) transcription factor family is one of the largest plant specific superfamilies, and includes genes with roles in modulation of plant growth and response to environmental stresses. Many HD-Zip genes are characterized in Arabidopsis (Arabidopsis thaliana), and members of the family are being investigated for abiotic stress responses in rice (Oryza sativa), maize (Zea mays), poplar (Populus trichocarpa) and cucumber (Cucmis sativus). Findings in these species suggest HD-Zip genes as high priority candidates for crop improvement. Results In this study we have identified members of the HD-Zip gene family in soybean cv. 'Williams 82', and characterized their expression under dehydration and salt stress. Homology searches with BLASTP and Hidden Markov Model guided sequence alignments identified 101 HD-Zip genes in the soybean genome. Phylogeny reconstruction coupled with domain and gene structure analyses using soybean, Arabidopsis, rice, grape (Vitis vinifera), and Medicago truncatula homologues enabled placement of these sequences into four previously described subfamilies. Of the 101 HD-Zip genes identified in soybean, 88 exist as whole-genome duplication-derived gene pairs, indicating high retention of these genes following polyploidy in Glycine ~10 Mya. The HD-Zip genes exhibit ubiquitous expression patterns across 24 conditions that include 17 tissues of soybean. An RNA-Seq experiment performed to study differential gene expression at 0, 1, 6 and 12 hr soybean roots under dehydration and salt stress identified 20 differentially expressed (DE) genes. Several of these DE genes are orthologs of genes previously reported to play a role under abiotic stress, implying conservation of HD-Zip gene functions across species. Screening of HD-Zip promoters identified transcription factor binding sites that are overrepresented in the DE genes under both dehydration and salt stress, providing further support for the role of HD-Zip genes in abiotic stress responses. Conclusions We provide a thorough description of soybean HD-Zip genes, and identify potential candidates with probable roles in dehydration and salt stress. Expression profiles generated for all soybean genes, under dehydration and salt stress, at four time points, will serve as an important resource for the soybean research community, and will aid in understanding plant responses to abiotic stress. We sequenced mRNA from soybean cv. "Williams 82" root samples that includes three control samples (0 hr), and three biological replicates for each of the three time points 1, 6 and 12 hr under dehydration and salt stress

			Action	DRS
	C08leaf_0.5h-r1.raw	Raw
	C08leaf_0.5h-r2.raw	Raw
	C08leaf_0.5h-r3.raw	Raw
	C08leaf_0h-r1.raw	Raw
	C08leaf_0h-r2.raw	Raw

Dataset Information

Galactolipid and Phospholipid Profile and Proteome Alterations in Soybean Leaves at the Onset of Salt Stress

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