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Detecting Early Signs of Heat and Drought Stress in Phoenix dactylifera (Date Palm)

ABSTRACT: Detecting Early Signs of Heat and Drought Stress in Phoenix dactylifera (Date Palm)

PROVIDER: PRJEB22923 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR2163550_1.fastq.gz	Fastqsanger.gz
	ERR2163550_2.fastq.gz	Fastqsanger.gz
	ERR2163560_1.fastq.gz	Fastqsanger.gz
	ERR2163560_2.fastq.gz	Fastqsanger.gz
	ERR2163570_1.fastq.gz	Fastqsanger.gz

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Detecting Early Signs of Heat and Drought Stress in Phoenix dactylifera (Date Palm)

Project description:Phoenix dactylifera seedlings were exposed to heat, drought and combined heat & drought conditions in growth chambers. Leaf samples were collected for total RNA isolation (RNAseq, Illumina HiSeq 1000), and water soluble metabolites. The RNAseq of four biological replicates (two individuals per replicate) were compared against the control condition. Transcriptomics data suggests the combine heat and drought resembled heat response, whereas drought resembled more to control. The hallmarks of heat stress were visible in the transcriptomics data, such as protein misfolding, response to hydrogen peroxide and cell wall modification, as well as ABA signaling in the case of drought. Since the plants were exposed to the stress for several days before harvesting, the early signs of heat stress such as calcium and NO signaling were not detected anymore. In addition, data suggest a significant enrichment of circadian rhythm motifs in the differentially expressed genes in heat and combined heat and drought stresses, suggesting new stress avoidance strategies.

2018-01-01 | E-MTAB-5756 | biostudies-arrayexpress

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Project description:Two tissues (root and shoot) of a salt tolerant (Khalas) and a salt sensitive (Nabut Saif) variety of date palm (Phoenix dactylifera) were salt treated and compared to control conditions by RNAseq.

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Detecting early signs of heat and drought stress in Phoenix dactylifera (date palm).

Project description:Plants adapt to the environment by either long-term genome evolution or by acclimatization processes where the cellular processes and metabolism of the plant are adjusted within the existing potential in the genome. Here we studied the adaptation strategies in date palm, Phoenix dactylifera, under mild heat, drought and combined heat and drought by transcriptomic and metabolomic profiling. In transcriptomics data, combined heat and drought resembled heat response, whereas in metabolomics data it was more similar to drought. In both conditions, soluble carbohydrates, such as fucose, and glucose derivatives, were increased, suggesting a switch to carbohydrate metabolism and cell wall biogenesis. This result is consistent with the evidence from transcriptomics and cis-motif analysis. In addition, transcriptomics data showed transcriptional activation of genes related to reactive oxygen species in all three conditions (drought, heat, and combined heat and drought), suggesting increased activity of enzymatic antioxidant systems in cytosol, chloroplast and peroxisome. Finally, the genes that were differentially expressed in heat and combined heat and drought stresses were significantly enriched for circadian and diurnal rhythm motifs, suggesting new stress avoidance strategies.

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