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Comparative proteomic analysis for revealing the advantage mechanisms of Salt-tolerant tomato (Solanum lycopersicum)

ABSTRACT: Salt stress causes the quality change and significant yield loss of tomato. However, the resources of salt-resistant tomato were still deficient and the mechanisms of tomato resistance to salt stress were still unclear. In this study, the proteomic profiles of two salt-tolerant and salt-sensitive tomato cultivars were investigated to deciphered the salt-resistance mechanism of tomato and provide novel resources for tomato breeding. We found that there is an over-abundant proteins relevant to Nitrate and amino acids metabolisms in the Salt-tolerant cultivars. The significant increase in expression of proteins involved in Brassinolides and GABA biosynthesis were verified in salt-tolerant cultivars, strengthening the salt resistance of tomato. Meanwhile, salt-tolerant cultivars with higher abundance and activity of antioxidant-related proteins have more advantages in dealing with reactive oxygen species caused by salt stress. And the salt-tolerant cultivars had higher photosynthetic activity based on overexpression of proteins functioned in chloroplast, guaranteeing the sufficient nutrient for plant growth under salt stress. Furthermore, three key proteins were identified as important salt-resistant resources for breeding salt-tolerant cultivars, including Sterol side chain reductase, gamma aminobutyrate transaminase and Starch synthase. Our results provided series valuable strategies for salt-tolerant cultivars which can be used in future

INSTRUMENT(S): Q Exactive HF

ORGANISM(S): Solanum Lycopersicum

TISSUE(S): Leaf

SUBMITTER: wang qiang

LAB HEAD: Qiang wang

PROVIDER: PXD029130 | Pride | 2022-02-08

REPOSITORIES: Pride

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Project description:Salt tolerance in grapevine is associated with the exclusion of chloride ions (ClM-bM-^@M-^S) from the shoot. The rate-limiting step for this process has been identified as the passage of ClM-bM-^@M-^S between the root symplast and the xylem apoplast through membrane integral proteins. To identify candidate genes for these proteins we used a custom microarray to compare the root transcriptomes of three grapevine varieties (Vitis spp.) that differ in their capacity to exclude ClM-bM-^@M-^S from shoots. When challenged with 50 mM ClM-bM-^@M-^S there were transcriptional responses that differed across the rootstocks 140 Ruggeri (a good ClM-bM-^@M-^S excluder) and K51-40 (a poor ClM-bM-^@M-^S excluder), and Cabernet Sauvignon (an intermediate ClM-bM-^@M-^S excluder and Vitis vinifera control). The magnitude of these salt-induced changes correlated with the amount of ClM-bM-^@M-^S accumulated in shoots. Abiotic-stress responsive transcripts (e.g. heat shock proteins) were induced in 140 Ruggeri. Respiratory transcripts were repressed in Cabernet Sauvignon. Expression of hypersensitive response and ROS scavenging transcripts were altered in the sensitive K51-40. Despite these differences, no obvious candidate ClM-bM-^@M-^S transporters were identified from the salt treatment. In contrast, under control conditions where differences in shoot ClM-bM-^@M-^S exclusion between rootstocks were still significant, we identified a number of genes encoding putative ion channels including VvSLAH3, VvALMT1, and possible regulators of these proteins such as VvSnRK2.6 and calcium dependent protein kinases (CDPK) as being differentially expressed between rootstocks. Members of the low affinity nitrate transporter (NRT1), and chloride channel (CLC) families were also identified. We propose these as useful candidates for further study within breeding programs aimed at improving plant salt tolerance in grapevine and other crops. Comparative: genotype versus genotype (control); and control (0 mM Cl) versus salt (50 mM Cl). Rooted leaves were grown as described by Gong et. al. (2010) (Journal of Experimental Botany). After 2 weeks of hydroponic growth, plants were exposed to 0 mM or 50 mM chloride stress for 4 days. Three biological replicates were used for 140 Ruggeri. Four biological replicates were used for Cabernet Sauvignon. Four biological replicates were used for K51-40. Each biological replicate consisted of total roots from four individual plants pooled together.

Project description:Gene-to-gene coexpression analysis is a powerful approach to infer function of uncharacterized genes. To perform non-targeted coexpression analysis of tomato genes, we collected a developmental gene expression dataset using various tissues of tomato plant. Expression data are collected from 24 different tissue types including root, hypocotyl, cotyledon, leaf at different stages, and fruit tissues at 4 different ripening stages from 4 different Solanum lycopersicum cultivars. Fruits were separated to the flesh and the peel. These two tissue types indeed showed remarkably different gene expression profiles. We also collected data from 4 different ripening stages (mature green, yellow, orange, and red) to detail the changes during ripening. By using this gene expression dataset, we calculated pair-wise Pearsonâs correlation coefficients, and performed network-based coexpression analysis. The analysis generated a number of coexpression modules, some of which showed an enrichment of genes associated with specific functional categories. This result will be useful in inferring functions of uncharacterized tomato genes, and in prioritizing genes for further experimental analysis. We used Affymetrix GeneChip Tomato genome Arrays to detail the global gene expression change using 24 different tomato tissue types (67 hybridizations). We collected gene expression data from 24 different tomato tissue types using 67 hybridizations. Root, hypocotyl, cotyledon, and leaf were sampled from 3-week-old or 5-weekâold plant of Solanum lycopersicum cultivar Micro-Tom. Fruit tissues were sampled from S. lycopersicum cultivars Micro-Tom, Anthocyanin fruit (Aft, LA1996), Line27859, and Momotaro 8 (Takii, Japan). From Micro-Tom fruit, the peel and the flesh were separately sampled from 4 different ripening stages: mature green (MG, approximately 30 day after anthesis), yellow (Y, approximately 35 days after anthesis), orange (O, approximately 38-40 days after anthesis), and red (R, approximately 45-48 days after anthesis). From fruits of Aft and Line27859, the peel and the flesh were sampled at mature green (MG, approximately 40 days after anthesis) and red (R, approximately 50-55 days after anthesis) stages. From Momotaro 8, the peel and the flesh were sampled at red (R, 50- approximately 50-55 days after anthesis) stages. For each tissue type, 2-4 biological replicates were made in RNA preparation.

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Comparative proteomic analysis for revealing the advantage mechanisms of Salt-tolerant tomato (Solanum lycopersicum)

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