Engineered chitosan based nanomaterials: Bioactivities, mechanisms and perspectives in plant protection and growth

Kumaraswamy, R.V.; Kumari, Sarita; Choudhary, Rakesh; Pal, Ajay; Raliya, Ramesh; Saharan͙, Vinod

doi:10.1016/j.ijbiomac.2018.02.130

Cited by 182 publications

(82 citation statements)

References 133 publications

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“…Chitosan was tested as a plant growth-promoter in many crops in several research studies. Indeed, the chitosan seeds coating resulted to boost the germination rate, the root apparatus, the aerial biomass, the photosynthetic rate, and the yield in maize, pearl millet, rapeseed, soybean, sunflower, peanut, rice, tomato, chickpea, and coffee [ 75 , 76 , 77 , 78 ]. In wheat, the kernels coated with chitosan (0.2–0.8%) significantly improved the germination rate, seedling growth parameters, and the synthesis of antioxidant enzymes (superoxide dismutase, peroxidase, and catalase) [ 79 ].…”

Section: Discussionmentioning

confidence: 99%

Chitosan Hydrochloride Decreases Fusarium graminearum Growth and Virulence and Boosts Growth, Development and Systemic Acquired Resistance in Two Durum Wheat Genotypes

et al. 2020

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Fusarium head blight (FHB) is a devastating disease for cereals. FHB is managed by fungicides at anthesis, but their efficacy is variable. Conventional fungicides accumulate in the soil and are dangerous for animal and human health. This study assayed the antifungal ability of chitosan hydrochloride against Fusarium graminearum. Chitosan reduced F. graminearum growth and downregulated the transcript of the major genes involved in the cell growth, respiration, virulence, and trichothecenes biosynthesis. Chitosan promoted the germination rate, the root and coleoptile development, and the nitrogen balance index in two durum wheat genotypes, Marco Aurelio (FHB-susceptible) and DBC480 (FHB-resistant). Chitosan reduced FHB severity when applied on spikes or on the flag leaves. FHB severity in DBC480 was of 6% at 21 dpi after chitosan treatments compared to F. graminearum inoculated control (20%). The elicitor-like property of chitosan was confirmed by the up-regulation of TaPAL, TaPR1 and TaPR2 (around 3-fold). Chitosan decreased the fungal spread and mycotoxins accumulation. This study demonstrated that the non-toxic chitosan is a powerful molecule with the potential to replace the conventional fungicides. The combination of a moderately resistant genotype (DBC480) with a sustainable compound (chitosan) will open new frontiers for the reduction of conventional compounds in agriculture.

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Section: Discussionmentioning

confidence: 99%

Chitosan Hydrochloride Decreases Fusarium graminearum Growth and Virulence and Boosts Growth, Development and Systemic Acquired Resistance in Two Durum Wheat Genotypes

et al. 2020

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“…Its activity against different fungi, gram positive and gram negative bacteria, is ascribed to the positive charge of amino group (NH 3 + ), which interacts electrostatically with the surface of the cellular membrane, destabilizing it. As a consequence, the presence of chitosan inside the cell can lead to intracellular responses such as inactivation or blocking of enzymes activities, and of DNA transcription and translation [7,8].The antifungal activity of chitosan not only depends on the fungus species, but also on its molecular weight (MW), polymerization degree (PD) or deacetylation degree (DD). For instance, chito-oligosaccharides with low MW, PD and DD have been reported to be more effective on phytopathogenic fungi than chitosan with higher MW, PD or DD [9][10][11].Another known advantage from chitosan and its oligomers is associated with their sorption and chelating properties.…”

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confidence: 99%

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confidence: 99%

Chitosan-Based Coatings to Prevent the Decay of Populus spp. Wood Caused by Trametes Versicolor

et al. 2018

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Chitosan and chitosan oligomers are receiving increasing attention due to their antimicrobial properties. In the present study, they were assayed as a preventive treatment against white-rot decay of Populus wood (very important in economic and environmental terms), caused by Trametes versicolor fungus. Their capacity to incorporate different chemical species into the polymer structure with a view to improving their anti-fungal activity was also assessed by mixing oligo-chitosan with propolis and silver nanoparticles. The minimum inhibitory concentration of medium-molecular weight chitosan (MMWC), chitosan oligomers (CO), propolis (P), nanosilver (nAg), and their binary and ternary composites against T. versicolor was determined in vitro. Although all products exhibited anti-fungal properties, composites showed an enhanced effect as compared to the individual products: 100% mycelial growth inhibition was attained for concentrations of 2.0 and 0.2 mg·mL −1 for the CO-P binary mixture, respectively; and 2 µg·mL −1 for nAg in the ternary mixture. Subsequently, MMWC, CO, CO-P and CO-P-nAg composites were tested on poplar wood blocks as surface protectors. Wood decay caused by the fungus was monitored by microscopy and vibrational spectroscopy, evidencing the limitations of the CO-based coatings in comparison with MMWC, which has a higher viscosity and better adhesion properties. The usage of MMWC holds promise for poplar wood protection, with potential industrial applications. Coatings 2018, 8, 415 2 of 15its main characteristics, such as its bioactivity, non-toxicity or biodegradability, its antimicrobial effect is especially relevant [4][5][6]. Its activity against different fungi, gram positive and gram negative bacteria, is ascribed to the positive charge of amino group (NH 3 + ), which interacts electrostatically with the surface of the cellular membrane, destabilizing it. As a consequence, the presence of chitosan inside the cell can lead to intracellular responses such as inactivation or blocking of enzymes activities, and of DNA transcription and translation [7,8].The antifungal activity of chitosan not only depends on the fungus species, but also on its molecular weight (MW), polymerization degree (PD) or deacetylation degree (DD). For instance, chito-oligosaccharides with low MW, PD and DD have been reported to be more effective on phytopathogenic fungi than chitosan with higher MW, PD or DD [9][10][11].Another known advantage from chitosan and its oligomers is associated with their sorption and chelating properties. The cationic nature of the polymer allows it to bind to different chemicals species, ranging from organic macromolecules to metal nanoparticles [12][13][14]. Natural oils or extracts of natural products can be incorporated into the chitosan matrix, for example, by cross-linking, producing solutions, films or beads [15][16][17]. In the particular case of propolis, its polyphenols have been reported to form hydrogen bonds and covalent bonds with the functional groups in chitosan [18]. This results...

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“…[19,79,109] With approximately 10 11 tons of chitin produced per year from waste crustacean carapaces, chitosan is a cost effective biomaterial [49,50]. Despite the fact that chitosan-based formulations sustain immense biological activities in plants, these materials have not yet been widely adopted as sustainable agricultural remedies due to the lack of reliable knowledge and research on their bioactivity, modes of action towards pathogenic microorganism, plant protection and growth [59].…”

Section: International/european Regulatory Aspects and Future Perspecmentioning

confidence: 99%

The 21st century revival of chitosan in service to bio-organic chemistry

Yaneva

Ivanova

Nikolova

et al. 2020

Biotechnology & Biotechnological Equipment

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The design and synthesis of biopolymer nano-and micro-formulations are a new trend with growing priority in scientific research and development in the fields of biomedicine, bioorganic/ medicinal chemistry, pharmaceutics, agrochemistry and food industry. This incorporates a vast variety of improved and newly-developed analytical and physico-chemical techniques for green and efficient synthesis. The scope of the present review was to outline the recent advances in the methods for design of novel chitosan micro-and nano-carriers and transporters. Special emphasis is laid on their functionalities and capacity for encapsulation of natural bioactive compounds and controlled in vitro/in vivo release in various biological/physiological media. Expectations for the application of chitosan formulations and chitosan-based hybrid systems are progressively increasing as the knowledge regarding their physical, chemical and biological properties constantly expands. Thus, this review proposes insights on the objective assessment of the capacity, applicability and versatility of newly-designed chitosan-based hybrid systems. A detailed integrative approach, which incorporates the innovative scientific achievements based on complex novel, precise and reliable analytical procedures and methods for qualitative and quantitative morphological, structural, spectral, chemical and biochemical analyses of the bioprecursors and the designed chitosan-carrier micro/nano-hybrid systems, is applied. Sustainable knowledge on the mechanism and methods of natural bioactive substances encapsulation and in vitro/in vivo release is reviewed and discussed.

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Engineered chitosan based nanomaterials: Bioactivities, mechanisms and perspectives in plant protection and growth

Cited by 182 publications

References 133 publications

Chitosan Hydrochloride Decreases Fusarium graminearum Growth and Virulence and Boosts Growth, Development and Systemic Acquired Resistance in Two Durum Wheat Genotypes

Chitosan Hydrochloride Decreases Fusarium graminearum Growth and Virulence and Boosts Growth, Development and Systemic Acquired Resistance in Two Durum Wheat Genotypes

Chitosan-Based Coatings to Prevent the Decay of Populus spp. Wood Caused by Trametes Versicolor

The 21st century revival of chitosan in service to bio-organic chemistry

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