PXD005238-2

PXD005238 is an original dataset announced via ProteomeXchange.

Title	Significant and unique changes in phosphorylation levels of nine phosphoproteins of leaves of two apple rootstock genotypes under drought stress
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.
HostingRepository	PRIDE
AnnounceDate	2024-10-22
AnnouncementXML	Submission_2024-10-22_04:33:48.230.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Jing Ren
SpeciesList	scientific name: Malus baccata; NCBI TaxID: 106549;
ModificationList	iTRAQ4plex-116 reporter+balance reagent acylated residue
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2016-10-28 07:09:33	ID requested
1	2016-11-08 01:48:11	announced
⏵ 2	2024-10-22 04:33:48	announced	2024-10-22: Updated project metadata.

Dataset with its publication pending

curator keyword: Biological

submitter keyword: stress responses, phosphoproteome,Apple rootstock, moderate drought stress, iTRAQ

College of Horticulture,
contact affiliation	Gansu Agricultural University
contact email	mailrenjing@163.com
lab head
Jing Ren
contact affiliation	Gansu Agricultural University
contact email	mailrenjing@163.com
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD005238
     1. Label: PRIDE project
     2. Name: Significant and unique changes in phosphorylation levels of nine phosphoproteins of leaves of two apple rootstock genotypes under drought stress