ABSTRACT: Unravelling the mechanisms and impacts of fungal fairy rings on plant diversity, and microbial communities in a montane Mediterranean grassland
Project description:Rings or arcs of fungus-stimulated plant growth occur often on the floor of woodlands which are commonly called “fairy rings”. We purified a plant growth-stimulating compound, 2-azahypoxanthine (AHX), from the fairy ring-forming fungus Lepista sordida, and the detection of AHX in the fungus-infected soil near the growth-stimulated turfgrass roots. The growth-promoting activity of AHX towards rice was further analyzed by oligo DNA microarrays.
Project description:Fairy rings are zones of stimulated grass growth by the interaction between the fungi and the plant. In the previous research, we reported the identification of the “fairy”, ICAproduced by the fairy ring-forming fungus and the mechanism of its growth-inhibiting activity using DNA microarray. We invetigate expression profiling of rice seedlings treated with ICA for the mechanism of its growth-inhibiting activity.
Project description:Fairy rings are zones of stimulated grass growth by the interaction between the fungi and the plant. In the previous research, we reported the identification of the “fairy”, 2-azahypoxanthine (AHX), produced by the fairy ring-forming fungus and the mechanism of its growth-promoting activity using DNA microarray. We discovered AOH, a common metabolite of AHX in plants. We investigate expression profiling of rice seedlings treated with AHX or AOH for the mechanism of their growth-promoting activity.
Project description:Fairy rings are zones of stimulated grass growth by the interaction between the fungi and the plant. In the previous research, we reported the identification of the M-bM-^@M-^\fairyM-bM-^@M-^], 2-azahypoxanthine (AHX), produced by the fairy ring-forming fungus and the mechanism of its growth-promoting activity using DNA microarray. We discovered AOH, a common metabolite of AHX in plants. We investigate expression profiling of rice seedlings treated with AHX or AOH for the mechanism of their growth-promoting activity. Three-condition experiment, control vs. AHX-treated rice (50 and 200 mM) and AOH-treated rice (50 and 200 mM).
Project description:Rings or arcs of fungus-stimulated plant growth occur often on the floor of woodlands which are commonly called “fairy rings”. We purified a plant growth-stimulating compound, 2-azahypoxanthine (AHX), from the fairy ring-forming fungus Lepista sordida, and the detection of AHX in the fungus-infected soil near the growth-stimulated turfgrass roots. The growth-promoting activity of AHX towards rice was further analyzed by oligo DNA microarrays. Immediately after germination, rice seedlings were treated with AHX and incubated for 2 weeks. Total RNA was isolated from the seedlings using an RNeasy plant mini kit (Qiagen). cDNA was synthesized to provide 400 ng of total RNA (Agilent Technologies). This cDNA was used as a template to synthesize cRNA. The cRNA was labeled with Cyanine-3 (Cy3) CTP or Cyanine-5 (Cy5) CTP. Cy3-labeled cRNA was mixed with the same amount of Cy5-labeled cRNA and the mixture was used for hybridization. After hybridization for 17 h at 65°C, the slides were washed and scanned with an Agilent Microarray Scanner. Genes showing a signal value below 300 in the Cy3 channel of the control were excluded from the analysis. Feature extraction and image analysis software (version A.6.1.1; Agilent Technologies) were used to locate and delineate each spot in the array and to integrate each spot’s intensity, filtering, and normalization. We attempted dye swap experiments to estimate the error of technical and dye labelling. Three-condition experiment, control vs. compound-treated rice (0.05 and 0.2 mM). Biological replicates: control, 0.05 mM AHX-treated, 0.2 mM AHX-treated rice independently grown and harvested. One replicate per array.
Project description:To gain plant compactness, producers use plant growth regulators (PGRs), in particular growth retardants during culture. However, due to their negative environmental impacts, growth retardants are progressively withdrawn from the market. Alternative, eco-friendly methods such as mechanical stimulation (MS), which mimics the effect imposed on plants by the wind, result in reduced stem elongation, increased stem diameter and increased branching, all of which contribute to plant compactness. So far, few plant species were studied under MS and little is known on molecular response mechanisms to MS. This first transcriptomic data after MS in Hydrangea macrophylla cv. ‘Wudu’® will contribute unravelling how plants respond to mechanical stimuli.