Application of Copper-Chitosan Nanoparticles Stimulate Growth and Induce Resistance in Finger Millet (Eleusine coracana Gaertn.) Plants against Blast Disease

Abstract

Copper-chitosan nanoparticle (CuChNp) was synthesized and used to study its effect on finger millet plant as a model plant system. Our objective was to explore the efficacy of CuChNp application to control blast disease of finger millet. CuChNp was applied to finger millet either as a foliar spray or as a combined application (involving seed coat and foliar spray). Both the application methods enhanced growth profile of finger millet plants and increased yield. The increased yield was nearly 89% in combined application method. Treated finger millet plants challenged with Pyricularia grisea showed suppression of blast disease development when compared to control. Nearly 75% protection was observed in the combined application of CuChNp to finger millet plants. In CuChNp treated finger millet plants, a significant increase in defense enzymes was observed, which was detected both qualitatively and quantitatively. The suppression of blast disease correlates well with increased defense enzymes in CuChNp treated finger millet plants.

The Application of Selenium and Copper Nanoparticles Modifies the Biochemical Responses of Tomato Plants under Stress by Alternaria solani

“…Nandini et al [26] reported that, when applying 100 ppm of Se NPs, the growth of the plant was not affected and it did not show any phytotoxic effect, similar to the results observed here. Sathiyabama and Manikandan [27] undertook foliar applications of copper nanoparticles-chitosan, resulting in more leaves, a greater height of the stems, and more fresh weight of the plants. Although it has been reported that both Se NPs and Cu NPs can induce changes in plant growth, this is not always the case, as demonstrated in this study.…”

Potential Biostimulant Effect of Clam Shells on Growth Promotion of Plantain PIF Seedlings (<i>var</i>. Big Ebanga & Batard) and Relation to Black Sigatoka Disease Susceptibility

“…Such effects of shells or chitin-source treatments on growth promotion and/or host resistance have also been reported for other pathosystems such as cocoa/snail shells/Phytophthora megakarya [9], tobacco/nanochitin/Fusarium spp. [21], chilli/chitosan/Colletotrichum capsica [22], millet/chitosan derivatives/Pyricola grisea [23], tomato/crab shells/Fusarium oxysporum [24] and cocoa/oyster shells/P. megakarya [20] through the possible triggering of biochemical pathways associated with growth promotion and disease resistance [8] [25] [26].…”

Biocompatibility and photo-induced antibacterial activity of lignin-stabilized noble metal nanoparticles

“…10 We have recently reported a one-pot synthesis of amoxicillin-coated gold nanoparticles that show synergistic antimicrobial activity upon light irradiation; 11 where the antimicrobial mechanism may involve the generation of localized heat and reactive oxygen species (ROS) upon light irradiation. 12,13 The growing interest in the use of environmentally friendly capping agents, as well as, the use of sustainable resources for antimicrobial applications, 14,15 such as food packaging, 16 has led our group towards the use of non-toxic and inexpensive capping agents. 17 Here we explore the use of lignin, the second most abundant natural polymer on earth aer cellulose, as an alternative reducing and capping agent for the synthesis and stabilization of metal nanoparticles for potential applications as antimicrobial agents.…”