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ABSTRACT: Field transcriptome revealed a novel relationship between nitrate transport and flowering in Japanese beech

PROVIDER: PRJNA523682 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8607410_1.fastq.gz	Fastqsanger.gz
	SRR8607410_2.fastq.gz	Fastqsanger.gz
	SRR8607411_1.fastq.gz	Fastqsanger.gz
	SRR8607411_2.fastq.gz	Fastqsanger.gz
	SRR8607412_1.fastq.gz	Fastqsanger.gz

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Field transcriptome revealed a novel relationship between nitrate transport and flowering in Japanese beech

Project description:Field transcriptome revealed a novel relationship between nitrate transport and flowering in Japanese beech

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Field transcriptome revealed a novel relationship between nitrate transport and flowering in Japanese beech

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Transcriptome analysis of the shoots of Arabidopsis wild-type and mutants deficient in either or both activities of nitrate reductase and alternative oxidase

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Project description:We report the nitrate-dependent regulation of gene-expression that resulted in the late flowering phenotype. This work studies the impact of NRT1.13 in the nitrate-dependent control of flowering.

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Project description:In this study we explain the physiological, biochemical and gene expression mechanisms adopted by nitrate-fed Arabidopsis thaliana plants growing under elevated [CO2], highlighting the importance of root-to-shoot interactions in these responses The transcriptomic approach (conducted at the root and shoot level) revealed that exposure to 800 ppm [CO2] conditioned the expression of genes involved in the transport of nitrate and mineral elements.

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The search of genetic resources for parthenocarpic pears and comparison of gene expression between high and low parthenocarpy cultivars

Project description:Parthenocarpy—the production of seedless fruits without fertilization—is very useful for fruit cultivation. Among pear cultivars (Japanese, Chinese, and European pears and their interspecific hybrids) subjected to flower emasculation and left unpollinated, only some of the European pears had a stable and high degree of fruit set and fruit enlargement. Almost all the enlarged fruits formed no seeds. Comparison of fruits produced by using emasculation without pollination or with self-pollination ruled out the possibility of stenospermocarpy in these parthenocarpic pears. The results suggested that the abovementioned characteristics were inherited maternally by the next generation and that it should be possible to introduce parthenocarpy into Japanese pears. Neither Chinese nor Japanese pears treated with emasculation and no pollination showed consistently stable fruit set or fruit enlargement. In Chinese pears, these characteristics varied greatly from year to year, and in Japanese pears they were stable but weak. Although in each cultivar highly parthenocarpic fruits weighed slightly less than cross-pollinated ones, the cortexes of the emasculated fruits were enlarged and the fruits were not greatly inferior to those of cross-pollinated ones. By using a customized pear cDNA microarray, we compared the gene expression profiles of highly and weakly parthenocarpic cultivars before flowering. Expression of several phenylpropanoid-related genes and photosystem-related genes differed significantly between the two groups. Some of these genes were contained in the chloroplast genome. These results showed the unique mechanism of genetic parthenocarpy in pome fruits as opposed to non-pome fruits. The gene expression profiles between high and low parthenocarpy group before flowering were compared.

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ZmNRT1.1B (ZmNPF6.6) determines nitrogen use efficiency via regulation of nitrate transport and assimilation in maize

Project description:Nitrate (NO3-) is crucial for optimal plant growth and development and often limits crop productivity at the low availability. In comparison with model plant Arabidopsis, the molecular mechanisms underlying NO3- acquisition and utilization remain largely unclear in maize. In particular, only a few genes have been exploited to improve nitrogen use efficiency (NUE). Here, we demonstrated that NO3--inducible ZmNRT1.1B (ZmNPF6.6) positively regulated NO3--dependent growth and NUE in maize. We showed that the tandem duplicated proteoform ZmNRT1.1C is irrelevant to maize seedling growth under nitrate supply, however, loss-of-function of ZmNRT1.1B significantly weakened plant growth under adequate NO3- supply in both hydroponic and field conditions. 15N-labeled NO3- absorption assay indicated that ZmNRT1.1B mediated high-affinity NO3--transport and root-to-shoot NO3- translocation. Furthermore, upon NO3- supply, ZmNRT1.1B promotes cytoplasmic-to-nuclear shuttling of ZmNLP3.1 (ZmNLP8), which co-regulates the expression of genes involved in NO3- response, cytokinin biosynthesis and carbon metabolism. Remarkably, overexpression of ZmNRT1.1B in modern maize hybrids improved grain yield under nitrogen (N) limiting fields. Taken together, our study revealed a crucial role of ZmNRT1.1B in high-affinity NO3- transport and signaling and offers valuable genetic resource for breeding nitrogen use efficient high-yield cultivars.

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