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      Nano-Biotechnology in Agriculture: Use of Nanomaterials to Promote Plant Growth and Stress Tolerance

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          Most cited references127

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          Plant responses to drought, salinity and extreme temperatures: towards genetic engineering for stress tolerance.

          Abiotic stresses, such as drought, salinity, extreme temperatures, chemical toxicity and oxidative stress are serious threats to agriculture and the natural status of the environment. Increased salinization of arable land is expected to have devastating global effects, resulting in 30% land loss within the next 25 years, and up to 50% by the year 2050. Therefore, breeding for drought and salinity stress tolerance in crop plants (for food supply) and in forest trees (a central component of the global ecosystem) should be given high research priority in plant biotechnology programs. Molecular control mechanisms for abiotic stress tolerance are based on the activation and regulation of specific stress-related genes. These genes are involved in the whole sequence of stress responses, such as signaling, transcriptional control, protection of membranes and proteins, and free-radical and toxic-compound scavenging. Recently, research into the molecular mechanisms of stress responses has started to bear fruit and, in parallel, genetic modification of stress tolerance has also shown promising results that may ultimately apply to agriculturally and ecologically important plants. The present review summarizes the recent advances in elucidating stress-response mechanisms and their biotechnological applications. Emphasis is placed on transgenic plants that have been engineered based on different stress-response mechanisms. The review examines the following aspects: regulatory controls, metabolite engineering, ion transport, antioxidants and detoxification, late embryogenesis abundant (LEA) and heat-shock proteins.
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            Intrinsic peroxidase-like activity of ferromagnetic nanoparticles.

            Nanoparticles containing magnetic materials, such as magnetite (Fe3O4), are particularly useful for imaging and separation techniques. As these nanoparticles are generally considered to be biologically and chemically inert, they are typically coated with metal catalysts, antibodies or enzymes to increase their functionality as separation agents. Here, we report that magnetite nanoparticles in fact possess an intrinsic enzyme mimetic activity similar to that found in natural peroxidases, which are widely used to oxidize organic substrates in the treatment of wastewater or as detection tools. Based on this finding, we have developed a novel immunoassay in which antibody-modified magnetite nanoparticles provide three functions: capture, separation and detection. The stability, ease of production and versatility of these nanoparticles makes them a powerful tool for a wide range of potential applications in medicine, biotechnology and environmental chemistry.
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              Role of silicon in enhancing the resistance of plants to biotic and abiotic stresses

              Jian Ma (2004)
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                Author and article information

                Contributors
                Journal
                Journal of Agricultural and Food Chemistry
                J. Agric. Food Chem.
                American Chemical Society (ACS)
                0021-8561
                1520-5118
                February 19 2020
                January 31 2020
                February 19 2020
                : 68
                : 7
                : 1935-1947
                Affiliations
                [1 ]State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
                [2 ]College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
                [3 ]College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
                [4 ]Stockbridge School of Agriculture, University of Massachusetts, Amherst 01003, Massachusetts, United States
                [5 ]Institute of Environmental Processes and Pollution Control, and School of Environmental and Civil Engineering, Jiangnan University, Wuxi 214122, China
                Article
                10.1021/acs.jafc.9b06615
                70a5df09-109b-4ed7-9591-3dbc8742579d
                © 2020
                Product
                Self URI (article page): https://pubs.acs.org/doi/10.1021/acs.jafc.9b06615

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