Unknown,Transcriptomics,Genomics,Proteomics

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Study of mRNA blueprint of Kharchia Local under salt stress

ABSTRACT: Kharchia local is an Indian tall landrace wheat cultivar. It is native to sodic-saline soils of Kharchia tehsil of the Pali district of Rajasthan, and is a line developed from selections from farmer's fields. It is the most salt tolerant wheat genotype found in India. No systematic study has been carried out in this direction so far. The gaps in understanding of the mechanism underlying salt tolerance limit our ability to improve the salt tolerance in other crop plants. Transcriptome analysis of Kharchia Local under salt stress will provide the insight into the genes involved in salinity tolerance.

INSTRUMENT(S): 454 GS FLX Titanium

ORGANISM(S): Triticum aestivum

SUBMITTER: Kanika Kumar

PROVIDER: E-MTAB-4433 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:Purpose: To characterize the functional implication of autophagy in the wheat response to stress, the key genes contributing in mediated salt tolerance of wheat seedlings through 3-MA were identified in normal or salt stress conditions in the presence or absence of added 3-MA by the transcriptome profiles. Methods: Four days after NaCl and 3-MA treatment, the roots and the third leaves were collected respectively with every 10 of them being mixed as one biological replicate for each treatment. Every treatment had four biological replicates. The wheat root and leaves mRNA profiles were generated by deep sequencing, in triplicate, using Illumina GAIIx. The sequence reads that passed quality filters were analyzed at the transcript isoform level with two methods: Burrows–Wheeler Aligner (BWA) followed by ANOVA (ANOVA) and TopHat followed by Cufflinks. qRT–PCR validation was performed using TaqMan and SYBR Green assays. Results: The RNA-Seq data had high quality and reliable results were obtained from the transcriptome assembly. A high correlation between biological replicates was observed for all treatments, which indicated that the four biological replicates were reliable in this study. Based on the principal component analysis (PCA), a clear separation between the NaCl-treated group and controls could be observed. The Q30 percentage (sequences with sequencing error rate lower than 0.1%) was over 94%, and the average GC content of the RNA-seq reads was 55.46%. After removing the adaptor and low-quality sequence, each library received 68310810-83844286 clean reads. These clean reads were mapped to the reference genome with match ratios in the range of 93.6%-95.9%, and 120744 genes predicted from the genome were found to be expressed (with FPKM > 0), including 25180 annotated genes in wheat genome. 3-MA treatment shifted the transcriptome a salt-stressed wheat seedling. The up-regulated DEGs and DEMs were increased, and the down-regulated DEGs and DEMs were decreased in 3-MA-added plants under NaCl stress condition. The study may help us understand the mechanism for 3-MA mediated salt tolerance and provide a theoretical basis for autophagy regulated salt response in wheat seedlings. Conclusions: 3-MA treatment shifted the transcriptome a salt-stressed wheat seedling. The up-regulated DEGs and DEMs were increased, and the down-regulated DEGs and DEMs were decreased in 3-MA-added plants under NaCl stress condition. The study may help us understand the mechanism for 3-MA mediated salt tolerance and provide a theoretical basis for autophagy regulated salt response in wheat seedlings.

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Study of mRNA blueprint of Kharchia Local under salt stress

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