Project description:High ambient temperature regulated the plant systemic response to the beneficial endophytic fungus Serendipita indica. Most plants in nature establish symbiotic associations with endophytic fungi in soil. Beneficial endophytic fungi induce a systemic response in the aboveground parts of the host plant, thus promoting the growth and fitness of host plants. Meanwhile, temperature elevation from climate change widely affects global plant biodiversity as well as crop quality and yield. Over the past decades, great progresses have been made in the response of plants to high ambient temperature and to symbiosis with endophytic fungi. However, little is known about their synergistic effect on host plants. The endophytic fungus Serendipita indica colonizes the roots of a wide range of plants, including Arabidopsis. Based on the Arabidopsis-S. indica symbiosis experimental system, we analyzed the synergistic effect of high ambient temperature and endophytic fungal symbiosis on host plants. By transcriptome analysis, we found that DNA replication-related genes were significantly upregulated during the systemic response of Arabidopsis aboveground parts to S. indica colonization. Plant hormones, such as jasmonic acid (JA) and ethylene (ET), play important roles in plant growth and systemic responses. We found that high ambient temperature repressed the JA and ET signaling pathways of Arabidopsis aboveground parts during the systemic response to S. indica colonization in roots. Meanwhile, PIF4 is the central hub transcription factor controlling plant thermosensory growth under high ambient temperature in Arabidopsis. PIF4 is also involving JA and/or ET signaling pathway. We found that PIF4 target genes overlapped with many differentially expressed genes (DEGs) during the systemic response, and further showed that the growth promotion efficiency of S. indica on the pif4 mutant was higher than that on the wild type plants.
Project description:Purpose: The goal of this study are to reveal the internal mechanism of silicon increased Glycyrrhiza uralensis Fisch. seedlings drought-tolerance,salt-tolerance and salt-drought tolerance by RNA-Seq. Methods: mRNA profiles of Glycyrrhiza uralensis Fisch. Seedling in eight treatment: control treatment with or without silicon,salt treatment with or without silicon,drought treatment with or without silicon,salt-drought treatment with or without silicon. Each treatment group sequenced the aerial (stems, leaves, buds and all the above ground parts) and underground parts (roots and all the underground parts) respectively Results:A total of 48 samples were sequenced and 372.37GB of clean data was acquired. The clean data of every sample reached 5.96GB, and the percentage of Q30 base was 94.63% or above. Clean reads of each sample were sequentially aligned with the specified reference genome, and alignment efficiency ranged from 85.27% to 92.66%. Therefore, the transcriptome data of samples were obtained with a high correct rate and good genomic coverage.Results of sequencing analysis showed that compared with CK group, there were 1426 DEGs (771 up-regulated and 655 down-regulated), 1386 DEGs (571 up-regulated and 815 down-regulated) and 4192 DEGs (1668 up-regulated and 2524 down-regulated) in aerial part, and 1462 DEGs (730 up-regulated and 732 down-regulated), 2212 DEGs (939 up-regulated and 1273 down-regulated) and 3735 DEGs (1768 up-regulated and 1986 down-regulated) in underground part of D, S and SD group respectively. Conclusions: Our study help to better understand the underlying molecular mechanisms of silicon improve the drought-tolerance,salt-tolerance and salt-drought tolerance of G. uralensis.
Project description:When aboveground parts of intact plants are exposed to volatile organic compounds emitted from neighboring con-/heterospecific plants that are artificially damaged or damaged by herbivores, the resistant responses are induced in the plants. Differential responses of plants to enantiomers of the same volatile compound have also been reported in Arabidopsis: the root became shorter when Arabidopsis seedlings are exposed to aerial borneol, and the dose-dependent root length reduction was significantly different between (+)- and (-)-borneol. We identified (+)-borneol dependent inductive genes in Arabidpsis in this transcriptome analysis.
Project description:To further explore the molecular mechanisms of P regulation in banana plants, we used RNA sequencing-based transcriptomic analysis for banana plants subjected to Pi deficit stress for 60 days.We detected 1900 significantly differentially expressed genes (DEGs) in aboveground plant parts and 7398 DEGs in root parts under low P stress. Gene ontology (GO) classification analysis showed that 156,291 GO terms belonging to molecular functions, 53,114 GO terms belonging to cellular components, and 228,544 GO terms belonging to biological processes were enriched in the aboveground and root components. A number of DEGs involved in energy metabolism-related processes, signal transduction, control of rhizosphere P activation, and Pi mobilization were found, which were confirmed by quantitative reverse-transcription PCR (RT-PCR) analysis. At the transcriptomic level, we detected 13 DEGs from different organs and with different functions in the time-course response to phosphorus deficiency stress. These DEGs may include some key genes that regulate the phosphorus network, increasing our understanding of the molecular mechanism of Pi homeostasis in banana.
Project description:Placenta transcriptome from two species of Spalax. Associated with the article "Genome-wide adaptive complexes to underground stresses in blind mole rats Spalax." Transcriptome or Gene expression
Project description:Contrary to the relative wealth of information regarding pathogen defense responses in aboveground plant parts, little is known about the mechanistic basis and regulation of plant immunity in root tissues. Aiming to further our fundamental understanding of root immune responses, we have investigated the interaction between rice and one of its major root pathogens, the oomycete Pythium graminicola. The specificic objectives of this study were twofold: i) to disentangle the molecular and genetic basis of the rice-Pythium interaction by comparing the transcriptome of rice roots at different times after inoculation with a highly virulent Pythium strains, and ii) to offer fundamental insights into the genetic architecture and regulation of rice disease resistance pathways operative in root tissue and to identify the molecular players controlling the possible nodes of convergence between these resistance conduits
2011-10-04 | GSE32582 | GEO
Project description:The complete chloroplast genome of Gentiana rhodantha Franch. ex Hemsl. (Gentianaceae) and its phylogenetic analysis
Project description:Placenta transcriptome from two species of Spalax. Associated with the article "Genome-wide adaptive complexes to underground stresses in blind mole rats Spalax."
Project description:Contrary to the relative wealth of information regarding pathogen defense responses in aboveground plant parts, little is known about the mechanistic basis and regulation of plant immunity in root tissues. Aiming to further our fundamental understanding of root immune responses, we have investigated the interaction between rice and one of its major root pathogens, the oomycete Pythium graminicola. The specificic objectives of this study were twofold: i) to disentangle the molecular and genetic basis of the rice-Pythium interaction by comparing the transcriptome of rice roots at different times after inoculation with a highly virulent Pythium strains, and ii) to offer fundamental insights into the genetic architecture and regulation of rice disease resistance pathways operative in root tissue and to identify the molecular players controlling the possible nodes of convergence between these resistance conduits Comparison between P. graminicola- and mock-infected rice roots. Two treatments (infected and non-infected) x three timepoints (1, 2 and 4 days post inoculation) x three biological replicates