Ontology highlight
ABSTRACT:
PROVIDER: PRJNA576170 | ENA |
REPOSITORIES: ENA
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Project description:Strawberry cultivation is associated with high mineral fertilizer doses and excessive use of chemical plant protection products. Based on previous research, we expected that chitin application to the growing medium will increase the nutrient availability and activate the plant’s systemic defense response, resulting in higher strawberry yields and less disease symptoms. We set up two experiments in which the temporal variability and differences in initial nutrient concentrations of the growing media were taken into account. Chitin induced the plant’s shoot biomass, explained by elevated N concentration in the growing medium and/or the attraction of plant-growth promoting fungal genera towards the plant root, such as Mortierella and Umbelopsis. The over-excessive N concentration and P and K deficiencies in the chitin treatment led to nutrient disbalances. This may explain the decreased fruit yield and disease resistance of the fruits towards Botrytis cinerea. In contrast, chitin caused a clear defense priming effect of the strawberry leaves, with a strong induction of the jasmonic acid response, resulting in less disease symptoms. Chitin caused positive effects on shoot growth and disease resistance of the leaves, but caution needs to be taken for nutrient disbalances leading to negative influences on fruit production and disease susceptibly.
2021-01-01 | GSE144526 | GEO
Project description:Chitin and Biochar in strawberry cultivation
| PRJNA603963 | ENA
Project description:Strawberry is economically important and widely grown but susceptible to a large variety of phytopathogenic organisms. Among them, Xanthomonas fragariae is a quarantine bacterial pathogen threatening strawberry productions by causing angular leaf spots. Using whole transcriptome sequencing, gene expression of both plant and bacteria in planta was analyzed at two time points, 12- and 29-days post inoculation, in order to compare pathogen and host response between the stages of early visible and of well-developed symptoms. Among 28’588 known genes in strawberry and 4’046 known genes in X. fragariae expressed at both time points, a total of 361 plant and 144 bacterial genes were significantly differentially expressed, respectively. The identified higher expressed genes in the plants were pathogen-associated molecular pattern receptors and pathogenesis related thaumatin encoding genes, whereas the more expressed early genes were related to chloroplast metabolism as well as photosynthesis related coding genes. Most of X. fragariae genes involved in host interactions, recognitions and pathogenesis, were lower expressed at late-phase infection. This study gives a first insight on the interaction of X. fragariae with its host. The strawberry plant changed its metabolism consistently with the progression of infection.
2020-08-25 | GSE150636 | GEO
Project description:Histone modifications mediate between genes and environment in plant growth and developmental events. To characterize the histone modification signatures in strawberry, we performed ChIP-seq experiments for seven histone marks in the immature and mature fruits, and leaves of the woodland strawberry F. vesca ('Ruegen'). The seven histone marks include H3K9/K14ac, H3K27ac, H3K4me1, H3K4me3, H3K36me3, H3K27me3 and H3K9me2. In addition, to reveal the effect of the histone deacetylase FvHDA6, H3K9/K14a was profiled in FvHDA6-OE fruits.
2024-09-25 | GSE208638 | GEO
Project description:Bacterial community of the strawberry and lettuce rhizosphere
| PRJNA294259 | ENA
Project description:Transition of Bacterial Community structure in Chitin-treated Upland Soil
| PRJDB8756 | ENA
Project description:Chitin utilization by microbes plays a significant role in cycling of carbon and nitrogen in the biosphere, and the study of the microbial approaches used to degrade chitin will facilitate our understanding of bacterial strategies to degrade this recalcitrant polysaccharide. The early stages of chitin depolymerization by the bacterium Cellvibrio japonicus have been characterized and are dependent on one chitin-specific lytic polysaccharide monooxygenase and non-redundant glycoside hydrolases from the family GH18 to generate chito-oligosaccharides for entry into metabolism. Here, we describe the mechanisms for the latter stages of chitin utilization by C. japonicus with an emphasis on the fate of chito-oligosaccharides. Our systems biology approach combined transcriptomics, bacterial genetics, and complex environmental substrates to determine the essential mechanisms for chito-oligosaccharide transport and catabolism in Cellvibrio japonicus. Using RNAseq analysis we found not only the up-regulation of genes that encode CAZymes specific for chitin metabolism but also a coordinated expression of non-chitin specific CAZyme genes. Furthermore, we used mutational analysis to characterize the hex20B gene product, predicted to encode a hexosaminidase, and found that it is required for efficient utilization of chito-oligosaccharides. Surprisingly, two additional gene loci (CJA_0353 and CJA_1157), which encode putative TonB-dependent transporters, were essential for shuttling chito-oligosaccharides into the periplasmic space. Here we propose naming these loci cttA (chito-oligosaccharides transporter A) and cttB respectively. This study further develops our model of how C. japonicus can derive nutrients from recalcitrant chitin-containing substrates and may be potentially useful for other environmentally or industrially important bacteria.
2020-04-30 | GSE149593 | GEO