Dataset Information

Ramie LC-MSMS - Isobaric Tags for Relative and Absolute Quantitation (iTRAQ)-Based Comparative Proteome Analysis of the Response of Ramie under Drought Stress

ABSTRACT: Ramie is an important natural fiber crop. Drought is an abiotic stress that strongly influences plant growth, development and productivity. There has been little research on the molecular mechanisms of ramie related to drought and then it is poorly understood. In this study, we conducted for the first time an iTRAQ-based (isobaric tags for relative and absolute quantitation) comparative proteomic analysis

INSTRUMENT(S): LTQ Orbitrap Elite

ORGANISM(S): Boehmeria Nivea (chinese Grass) (urtica Nivea)

TISSUE(S): Plant Cell, Leaf

DISEASE(S): Duodenal Ulcer

SUBMITTER: An Xia

LAB HEAD: Bo Wang

PROVIDER: PXD001940 | Pride | 2016-10-05

REPOSITORIES: Pride

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Isobaric Tags for Relative and Absolute Quantitation (iTRAQ)-Based Comparative Proteome Analysis of the Response of Ramie under Drought Stress.

An Xia X Zhang Jingyu J Dai Lunjin L Deng Gang G Liao Yiwen Y Liu Lijun L Wang Bo B Peng Dingxiang D

International journal of molecular sciences 20160927 10

In this study, we conducted the first isobaric tags for relative and absolute quantitation (isobaric tags for relative and absolute quantitation (iTRAQ))-based comparative proteomic analysis of ramie plantlets after 0 (minor drought stress), 24 (moderate drought stress), and 72 h (severe drought stress) of treatment with 15% (w/v) poly (ethylene glycol)6000 (PEG6000) to simulate drought stress. In our study, the association analysis of proteins and transcript expression reve ...[more]

PMID: 27689998

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Project description:Drought stress is a major problem around the world and although progress in understanding how vegetable crops and model plants adapt to drought have been made, there is still little information about how fruit crops deal with moderate drought stress. In this study, we investigated the response of two apple genotypes: a drought-sensitive genotype (M26) and a drought-tolerant genotype (MBB). Our results of the morphology, physiology and biochemistry under moderate drought stress, indicated that relative water content (RWC) and leaf area (LA) were not significant changes in two genotypes. However, it had larger leaf mass per area (LMA), and accumulated higher free proline (CFP), soluble sugars (CSS) and malonaldehyde (MDA) in the leaves. Thus, it appears that the MBB genotype could produce more osmosis-regulating substances. Phosphoproteomic was analyzed from leaves of both genotypes under moderate drought stress using the isobaric tags for relative and absolute quantification (iTRAQ) technology. A total of 595 unique phosphopeptides, 682 phosphorylated sites and 446 phosphoproteins were quantitatively analyzed in the two genotypes. Motif analyses of the phosphorylation sites showed that six motifs including [PxsP], [sP], [sD], [Rxxs], [sxP] and [sxs] were enriched. We identified 12 and 48 PLSC phosphoproteins in M26 and MBB, respectively. Among these, 9 PLSC phosphoproteins were common to both genotypes, perhaps indicating a partial overlaps of the mechanisms to moderate drought stress. Gene ontology analyses revealed that the PLSC phosphoproteins present a unique combination of metabolism, transcription, translation and protein processing, suggesting that the response in apple to moderate drought stress encompasses a new homeostasis of major cellular processes. The basic trend was an increase in protein abundance related to drought and organic substance upon moderate drought stress between two genotypes. These increases were higher in the drought-tolerant genotype (MBB) than in the drought-sensitive genotype (M26). The 23 differentially expressed mRNA encoding phosphoproteins were analysis by quantitative real-time PCR (qRT-PCR). Our study is the first to address the phosphoproteome of a major fruit crop, apple rootstocks, in response to moderate drought stress, and provide insights into the molecular regulation mechanisms of apple rootstock under moderate drought stress.

Project description:In the field, abiotic stresses are rarely applied individually. Crops are often subjected to a combination of stresses. To date, no study has been performed on the proteomic investigation of the response of common wheat to a combination of drought and cold stresses. In this study, wheat seedlings exposed to drought-cold stress for 24 h showed inhibited growth, increased lipid peroxidation, relative electrolyte leakage, and soluble sugar contents. To determine the wheat protein response to drought-cold stress, iTRAQ-based quantitative proteomic and liquid chromatography tandem mass spectrometry (LC-MS/MS) methods were employed to determine the proteomic profiles of the roots and leaves of wheat seedlings exposed to drought-cold stress conditions. We identified 250 and 258 proteins with significantly altered abundance in the roots and leaves, respectively. These proteins were classified into several main groups, as follows: protein metabolism, stress/defense, carbohydrate metabolism, lipid metabolism, transcription-related processes, energy production, cell-wall and cytoskeleton metabolism, membrane and transportation, signal transduction, other metabolic processes, and unknown biological processes. Nine proteins were simultaneously presented in both roots and leaves exposed to drought-cold stress, and the majority of proteins identified differed from one another and displayed differently altered abundance. These findings uncovered organ-specific differences in adaptation to drought-cold stress. Exogenous abscisic acid (ABA) application conferred the plant with protection against drought-cold stress and significantly increased catalase and peroxidase enzyme activities, as well as the transcription of glutathione S-transferase and other 11 sample genes in the roots or leaves, respectively. These results suggested that ABA is a potentially vital factor that contributes to the drought-cold signaling pathway and a promising target for growth recovery. Furthermore, VIGS (virus-induced gene silencing)-treated plants generated for three candidate protein genes TaGRP2, CDCP and WCOR410c were subjected to drought-cold limitation, they showed more serious droop and wilt, increased rate of relative electrolyte leakage, and reduced relative water content (RWC) compared to viral control plants. These results may indicate that TaGRP2, CDCP and WCOR410c play important roles in conferring drought-cold tolerance in wheat. These findings can provide useful insights into the molecular mechanisms of drought-cold responses in higher plants.

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Dataset Information

Ramie LC-MSMS - Isobaric Tags for Relative and Absolute Quantitation (iTRAQ)-Based Comparative Proteome Analysis of the Response of Ramie under Drought Stress

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Isobaric Tags for Relative and Absolute Quantitation (iTRAQ)-Based Comparative Proteome Analysis of the Response of Ramie under Drought Stress.

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