يعرض 1 - 20 نتائج من 112 نتيجة بحث عن '"exogenous application"', وقت الاستعلام: 0.68s تنقيح النتائج
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    المصدر: International Journal of Molecular Sciences; Volume 23; Issue 9; Pages: 5186

    جغرافية الموضوع: agris

    وصف الملف: application/pdf

    Relation: Molecular Plant Sciences; https://dx.doi.org/10.3390/ijms23095186

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    Conference

    المساهمون: SBI, Piacentini, D, Della Rovere, F, Fattorini, L, Ronzan, M, Falasca, G, Massini, L, Sofo, A, Altamura, Mm

    مصطلحات موضوعية: Oryza sativa L. is a worldwide food-crop frequently growing in cadmium (Cd) polluted soils. High Cd concentrations alter plant development and, in particular, the root-system, both by affecting auxin metabolism and by triggering reactive oxygen/nitrogen species (ROS/RNS), thereby affecting rice yield. In addition, Cd2+ easily enters in the rice root cells through passive transport, reaching the grains after xylem-tophloem transfer, thus becoming a threat to food security. Nitrogen monoxide (nitric oxide NO) is a ubiquitous gaseous molecule involved in numerous animal and plant physiological processes, and it is also a mediator of plant development and of abiotic/biotic stresses response. Various reports highlight that NO has an important role in alleviating heavy metal toxicity and reducing the oxidative damages in plant organs either by enhancing the activity of antioxidant enzymes or by directly scavenging ROS. On the other hand, heavy metal-induced accumulation of NO was reported to be responsible for heavy metal toxicity. Indeed, NO can act either as a stress-inducing agent or as a protective molecule depending on its concentration, the plant tissue or age, and the type/severity of stress. At optimal levels, NO interacts with auxins [both indole-3 butyric acid (IBA) and indole-3 acetic acid (IAA)] during root growth and development. An auxin-induced NO production during many plant root responses has been suggested trough the modulation of the activity of enzymes involved in NO biosynthesis, while studies carried out with exogenous application of NO-specific donor compounds (i.e. sodium-nitroprusside, SNP) have demonstrated the involvement of the signal molecule in auxin metabolism, transport and signalling. However, the complex mechanisms underlying the interaction between NO and auxin during the metal stress is still poorly understood and need to be better investigated, together with further elucidations about the multifaceted role of NO (i.e. as a mitigating or a stressor agent) during Cd toxicity. To this aim, the effects of Cd toxicity on rice root anatomy/morphology and on H2O2 and O2 recovery by NO, was evaluated after 100μM Cd exposure, combined or not with SNP at 50μM. Moreover, endogenous IAA/IBA contents, transcription-levels of OsYUCCA1 and OsASA2 IAA-biosynthetic-genes, and expression of the IAA-responsive DR5::GUS construct were analysed, and the NO epifluorescence levels measured. Our results show that exogenous treatments with the NO-donor SNP increase intracellular root NO levels in in vitro grown rice seedlings not exposed to Cd and restore the NO-levels reduced by the heavy metal. In addition, SNP treatments mitigate both the increase in the HPLC-measured root IAA levels and the alteration of its distribution monitored by the DR5::GUS system due to the toxic metal exposure. Notably, treatments with Cd alone or combined with SNP reduced YUCCA1 expression compared to the Control, while no effects were detected on ASA2, suggesting no involvement of the two IAA biosynthetic genes in the Cd-related increase of the IAA levels detected. Finally

    وصف الملف: ELETTRONICO

    Relation: ispartofbook:115° Congresso della Società Botanica Italiana (SBI); 115° Congresso della Società Botanica Italiana (SBI); firstpage:57; lastpage:57; numberofpages:1; alleditors:SBI; http://hdl.handle.net/11563/144077

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    المساهمون: Department of Agricultural Sciences, Crop Science Research Group, Department of Food and Nutrition, Food quality and safety: lipids, vitamins and other bioactive compounds, Helsinki Institute of Sustainability Science (HELSUS), Plant Production Sciences

    وصف الملف: application/pdf

    Relation: Jokinen , K , Salovaara , A-K J , Wasonga , D , Edelmann , M , Simpura , I & Mäkelä , P 2022 , ' Root-Applied Glycinebetaine Decreases Nitrate Accumulation and Improves Quality in Hydroponically Grown Lettuce ' , Food Chemistry , vol. 366 , 130558 . https://doi.org/10.1016/j.foodchem.2021.130558; ORCID: /0000-0002-8757-6015/work/100694017; ORCID: /0000-0002-0992-3552/work/100697020; http://hdl.handle.net/10138/334648; 5751c095-7745-44c2-9c10-24f215ac6dbe; 000696903000008

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    المساهمون: Department of Microbiology, Plant-Virus Interactions, Department of Agricultural Sciences, Institute for Molecular Medicine Finland, Biosciences, Viikki Plant Science Centre (ViPS), Plant Pathology and Virology, Plant Production Sciences

    وصف الملف: application/pdf

    Relation: This work was supported by the China Scholarship Council (State Scholarship Fund grant number 201406040060) and the Bill & Melinda Gates Foundation, Seattle, WA (NextGen Phytosanitation) . We thank Laura Turunen and Swapnil Potdar from the Institute for Molecular Medicine Finland (FIMM) for their technical help, Kristiina Himanen and Mirko Pavicicfrom the Plant Phenomics Research Group for support with the NaPPI platform, and Katrin Artola from the Plant Pathology Research Group for assistance and advice. The DDCB core facility (FIMM HTB unit) is supported by the University of Helsinki and Biocenter Finland. L.W. contributed to designing the study, performing the experiments, interpreting the data, and writing the draft of the paper. S.P. and J.S. contributed to performing the experiments and reviewing the paper. K.L. contributed to performing the experiments. A.P., T.L., and J.P.T.V. contributed to reviewing the paper. We declare that the results of this research are included in patent application FI 20205392, which could relate to financial interests.; Wang , L , Pogue , S , Laamanen , K , Saarela , J , Poso , A , Laitinen , T & Valkonen , J P T 2021 , ' In Vitro Identification and In Vivo Confirmation of Inhibitors for Sweet Potato Chlorotic Stunt Virus RNA Silencing Suppressor, a Viral RNase III ' , Journal of Virology , vol. 95 , no. 12 , ARTN e00107-21 . https://doi.org/10.1128/JVI.00107-21; ORCID: /0000-0001-7306-7175/work/95762630; ORCID: /0000-0002-3704-9911/work/95763480; ORCID: /0000-0002-0202-3703/work/95764300; http://hdl.handle.net/10138/331648; 58edce09-de77-4bc9-bdf7-0b5c123dcf22; 000656996900010

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    المصدر: Plants; Volume 10; Issue 2; Pages: 219

    جغرافية الموضوع: agris

    وصف الملف: application/pdf

    Relation: Plant Physiology and Metabolism; https://dx.doi.org/10.3390/plants10020219

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