Dataset Information

Phosphoproteomic analyses the tetraploid Citrus wilsonii enhanced drought tolerance

ABSTRACT: In this study, 17 plants of tetraploid “Zhique” were firstly identified by screening 570 natural seedlings of Citrus wilsonii Tanaka. These tetraploid plants showed different morphology and exhibited significantly increased drought tolerance than the diploids via determination of leaf water potential, relative water content and electrolyte leakage. Large number of genes involved in photosynthesis-responsive were differentially expressed in tetraploids under drought stress by global transcriptome analysis, which was consistent with the detection of photosynthesis indicator including photosynthetic rate, stomatal conductance, chlorophyll and so on. Compared with diploids, phosphorylation modification also plays an important role in the tetraploids after drought stress through the transcriptional and protein level analysis. Additionally, the genes involved in the phenylpropanoid biosynthesis and starch and sucrose metabolism pathways were enriched in both tetraploids and diploids in response to water deficient. Importantly, tetraploids significantly take priority over the diploid via regulating plant hormone signal transduction, especially improving the levels of 3-indoleacetic acid, abscisic acid and salicylic acid and reducing gibberellic A3 and jasmonic acid contents. Collectively, our data reveals that synergistic regulation photosynthesis, phosphorylation modification and plant hormones accumulation contribute to drought tolerance of autotetraploid in Citrus wilsonii.

INSTRUMENT(S): Orbitrap Exploris 480

ORGANISM(S): Citrus Wilsonii

TISSUE(S): Leaf

SUBMITTER: jinglong jiang

LAB HEAD: Jinglong Jiang

PROVIDER: PXD031236 | Pride | 2022-06-09

REPOSITORIES: Pride

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Publications

Tetraploidy in Citrus wilsonii Enhances Drought Tolerance via Synergistic Regulation of Photosynthesis, Phosphorylation, and Hormonal Changes.

Jiang Jinglong J Yang Ni N Li Li L Qin Gongwei G Ren Kexin K Wang Haotian H Deng Jiarui J Ding Dekuan D

Frontiers in plant science 20220428

Polyploidy varieties have been reported to exhibit higher stress tolerance relative to their diploid relatives, however, the underlying molecular and physiological mechanisms remain poorly understood. In this study, a batch of autotetraploid Citrus wilsonii were identified from a natural seedling population, and these tetraploid seedlings exhibited greater tolerance to drought stress than their diploids siblings. A global transcriptome analysis revealed that a large number of genes involv ...[more]

PMID: 35574073

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Project description:Drought is one of the most important environmental fluctuations affecting tree growth and survival. Therefore, understanding of physiological and transcriptomic responses of trees to this stress factor will make important contributions to forest health and productivity. Here, we report comparative physiological and microarray based transcriptome analysis between drought resistant (N.62.191) and drought-sensitive (N.03.368.A) black poplar genotypes under well-watered (WWP), moderate drought (MD), severe drought (SD) and post drought re-watering (PDR) conditions. In the study, sensitive genotype exhibited a drought escape strategy with lower leaf water potential, higher reactive oxygen production, complete leaf abscission and subsequent terminal shoot necrosis under drought stress. On the other hand, resistant genotype had a dehydration tolerance indicating highly delayed leaf abscission under drought and fast growing capacity during re-watering conditions. Gene ontology enrichment analysis attributed drought susceptibility of black poplar to significant up-regulation of genes functional in transcription regulation (AP2/ERF, NAC and WRKY), cell wall modification (Expansins), fatty acid metabolism (enoyl-ACP reductase, lipid transport protein particle), protein degradation (endopeptidases), ethylene synthesis (1-aminocyclopropane-1-carboxylate) and riboflavin synthesis (GTP cyclohydrolase II) under drought stress. Transcriptomic comparison indicated significant down-regulation of photosynthesis, electron transport and carbohydrate metabolism related genes under drought stress in sensitive genotype. Although, similar reduction in carbohydrate metabolism was also recorded for resistant genotype, genes related with photosynthesis and electron transport systems were not down regulated even under SD for this genotype. Resistant genotype specific up-regulation of small heat shock proteins (sHSP) and bark storage proteins revealed importance of protein protection and nitrogen remobilization under drought stress, respectively. This is the first study associating BSP production to delayed leaf abscission and drought tolerance in trees. For Microarray experiment total RNA was isolated from the leaves randomly selected from two balck poplar seedlings (two biological replicates) for resistant and sensitive genotypes at well watered period (WWP), moderate drought (MD), severe drought (SD) and post drought rewatering (PDR) periods. For each water availability regime total isolated RNA was loaded onto two Affymetrix poplar Gene Chips for each genotype. Totally 16 Affymetrix poplar GeneChips (2 genotypes × 4 water availability regimes × 2 biological replicates) were used for transcriptional analysis.

Dataset Information

Phosphoproteomic analyses the tetraploid Citrus wilsonii enhanced drought tolerance

Publications

Tetraploidy in <i>Citrus wilsonii</i> Enhances Drought Tolerance <i>via</i> Synergistic Regulation of Photosynthesis, Phosphorylation, and Hormonal Changes.

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