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Differentiation of the high night temperature response in leaf segments of rice cultivars with contrasting tolerance

ABSTRACT: Differentiation of the high night temperature response in leaf segments of rice cultivars with contrasting tolerance

PROVIDER: PRJNA744520 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15060400.fastq.gz	Fastqsanger.gz
	SRR15060401.fastq.gz	Fastqsanger.gz
	SRR15060402.fastq.gz	Fastqsanger.gz
	SRR15060403.fastq.gz	Fastqsanger.gz
	SRR15060404.fastq.gz	Fastqsanger.gz

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Differentiation of the high night temperature response in leaf segments of rice cultivars with contrasting tolerance

Project description:Transcript and metabolite profiling were performed in leaf segments (sheath, base, middle, tip) of six rice cultivars with different sensitivity to high night temperatures (HNT). On the phenotypic level, leaves of HNT-sensitive rice cultivars showed clear stress symptoms by chlorosis and necrosis while almost no leaf phenotype different from the control was observed for the tolerant varieties. The aim of this study was to identify molecular key-player for HNT-sensitivity causing leaf senescence.

2021-09-27 | GSE179662 | GEO

Differentiation of the High Night Temperature Response in Leaf Segments of Rice Cultivars with Contrasting Tolerance.

Project description:High night temperatures (HNT) affect rice yield in the field and induce chlorosis symptoms in leaves in controlled chamber experiments. However, little is known about molecular changes in leaf segments under these conditions. Transcript and metabolite profiling were performed for leaf segments of six rice cultivars with different HNT sensitivity. The metabolite profile of the sheath revealed a lower metabolite abundance compared to segments of the leaf blade. Furthermore, pre-adaptation to stress under control conditions was detected in the sheath, whereas this segment was only slightly affected by HNT. No unique significant transcriptomic changes were observed in the leaf base, including the basal growth zone at HNT conditions. Instead, selected metabolites showed correlations with HNT sensitivity in the base. The middle part and the tip were most highly affected by HNT in sensitive cultivars on the transcriptomic level with higher expression of jasmonic acid signaling related genes, genes encoding enzymes involved in flavonoid metabolism and a gene encoding galactinol synthase. In addition, gene expression of expansins known to improve stress tolerance increased in tolerant and sensitive cultivars. The investigation of the different leaf segments indicated highly segment specific responses to HNT. Molecular key players for HNT sensitivity were identified.

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Transcript profiling of six rice cultivars with different tolerance level under high night temperatures

Project description:Regulation of transcript expression in different tolerance classes of rice cultivars in response to high night temperatures (HNT) is investigated. The aim was to identify marker genes which are responsible for HNT tolerance. Addiditionally gene expression data are combined with GC-MS data analysis (primary metabolites) to identify global changes in response to HNT.

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Transcriptomic insights into differential cold tolerance of two tobacco cultivars

Project description:Purpose: we conducted a six time-point transcriptomic analysis using two tobacco cultivars with contrasting cold responses, Taiyan8 tobacco (TT, cold susceptibility) and Yanyan97 tobacco (YT, cold resistance). Methods: mRNA profiles of Tobacco seedlings from CK and cold-treated plants were generated by deep sequencing, in triplicate, usingIllumina Hiseq4500. The sequence reads that passed quality filters were analyzed at the transcript isoform level with methods: hisat2 (v2.0.5), SAMtools (v1.9). StringTie (v1.3.4d) and FeatureCounts (v1.6.4) Results: We found that both cultivars had common mechanisms to cope with cold stress, including common differentially expressed genes (DEGs), similar time-point-related differential expression profile of genes, and similar NtCBF gene co-expression modules, suggesting conservation of adaptation strategies for cold responses. Importantly, we found that YT experienced DEGs even under normal growth condition and had less DEGs in early stage of cold stress (0.5-2 h) when compared to TT, reflecting occurrence of genotype-dependent gene transcription. Moreover, a gene co-expression module (brown) with stress-related genes up-regulated in YT instead of TT at late stage (4-8 h), which might contribute to contrasting phenotypic changes during cold stress between TT and YT. Conclusions: our study provides valuable resources for transcriptomic studies of cold responses in plants. It also helps to identify key cold responsive genes for genetic manipulation for breeding of tobacco cultivars in the future.

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Chloroplast activity provides invitro regeneration capability in contrasting cultivars

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Chloroplast activity provides invitro regeneration capability in contrasting cultivars

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Various tomato cultivars display contrasting morphological and molecular responses to a chronic heat stress

Project description:Climate change is one of the biggest threats that human society currently needs to face. Heat waves associated with global warming negatively affect plant growth and development and will increase in intensity and frequency in the coming years. Tomato is one of the most produced and consumed fruit in the world but remarkable yield losses occur every year due to the sensitivity of many cultivars to heat stress. New insights into how tomato plants are responding to heat stress will contribute to the development of cultivars with high yields under harsh temperature conditions. In this study, the analysis of microsporogenesis and pollen germination rate of eleven tomato cultivars after exposure to a chronic heat stress revealed differences between genotypes. The transcriptome of floral buds at two developmental stages of five cultivars revealed common and specific molecular responses implemented by tomato cultivars to cope with chronic heat stress. These data provide valuable insights into the diversity of the genetic response of floral buds from different cultivars to heat stress and may contribute to the development of future climate resilient tomato varieties.

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