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Identification of Differentially Expressed MicroRNAs and Target Genes of Sunflower Leaves and Roots Under Drought Stress

ABSTRACT: Identification of Differentially Expressed MicroRNAs and Target Genes of Sunflower Leaves and Roots Under Drought Stress

PROVIDER: PRJNA623519 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11497518.fastq.gz	Fastqsanger.gz
	SRR11497519.fastq.gz	Fastqsanger.gz
	SRR11497520.fastq.gz	Fastqsanger.gz
	SRR11497521.fastq.gz	Fastqsanger.gz
	SRR11497522.fastq.gz	Fastqsanger.gz

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Identification of Differentially Expressed MicroRNAs and Target Genes of Sunflower Leaves and Roots Under Drought Stress

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Identification of differentially expressed genes in sunflower (Helianthus annuus) leaves and roots under drought stress by RNA sequencing.

Project description:BackgroundSunflower is recognized as one of the most important oil plants with strong tolerance to drought in the world. In order to study the response mechanisms of sunflower plants to drought stress, gene expression profiling using high throughput sequencing was performed for seedling leaves and roots (sunflower inbred line R5) after 24 h of drought stress (15% PEG 6000). The transcriptome assembled using sequences of 12 samples was used as a reference.Results805 and 198 genes were identified that were differentially expressed in leaves and roots, respectively. Another 71 genes were differentially expressed in both organs, in which more genes were up-regulated than down-regulated. In agreement with results obtained for other crops or from previous sunflower studies, we also observed that nine genes may be associated with the response of sunflower to drought.ConclusionsThe results of this study may provide new information regarding the sunflower drought response, as well as add to the number of known genes associated with drought tolerance.

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Evaluation of Differentially Expressed Genes in Leaves vs. Roots Subjected to Drought Stress in Flax (<i>Linum usitatissimum</i> L.).

Project description:Drought stress is a common environmental challenge that plants face, severely constraining plant growth and reducing crop yield and quality. Several studies have highlighted distinct responses between monocotyledonous and dicotyledonous plants. However, the mechanisms underlying flax tolerance to abiotic stress, such as drought, remain unclear. In this study, we investigated the morphological, physiological, and biochemical characteristics and the genome-wide gene expression of oil flax and fiber flax in response to drought stress. The results revealed that drought stress caused significant wilting of flax leaves. Within the first 24 h of stress, various physiological and biochemical characteristics exhibited rapid responses. These included fresh weight, relative water content (RWC), proline, soluble protein, soluble sugar, superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) in the leaves or roots of flax. Additionally, drought stress led to a significant rise in lignin content in fiber flax. In addition, the transcriptome analysis demonstrated genome-wide variations in gene expression induced by drought stress. Specifically, genes associated with photosynthesis, proline biosynthesis, and phytohormone metabolism exhibited significant differences in expression levels under stress conditions in flax. These findings highlight the rapid response of flax to drought stress within a short-term period. Our experiment also revealed that, although there were variations in the levels of small compound content or gene expression between Longya10 and Fany under drought stress, most stress-resistance responses were similar. Furthermore, the results provide additional evidence supporting the existence of mechanisms underlying the response to drought stress in plants.

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