Modulation of alkaloid content, growth and productivity of Trigonella foenum-graecum L. using irradiated sodium alginate in combination with soil applied phosphorus

Dar, Tariq Ahmad; Uddin, Moin; Khan, M. Masroor A.; Ali, Akbar; Varshney, Lalit

doi:10.1016/j.jarmap.2016.05.003

Cited by 19 publications

(14 citation statements)

References 59 publications

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“…Both biopolymers were found to stimulate growth of the investigated Eucomis species but the plants treated with oligo-gellan produced leaves and bulbs of greater fresh weight, flowered earlier, and accumulated higher levels of potassium. These outcomes confirmed previous findings that indicated positive effects of oligomers obtained from degraded polysaccharides on the growth and yield of different plant species such as Capsicum frutescens [ 53 ], Trigonella foenum-graecum [ 54 ], and Eucalyptus globulus [ 55 ]. The improved examined growth parameters as a result of gellan gum and oligo-gellan application might be ascribed to the role of oligosaccharides in plant growth stimulation in general [ 56 ].…”

Section: Discussionsupporting

confidence: 90%

Exopolysaccharide Gellan Gum and Derived Oligo-Gellan Enhance Growth and Antimicrobial Activity in Eucomis Plants

2018

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One of the visible trends in the cultivation of plants, particularly of medicinal ones, is the increasing interest of researchers in polysaccharides and their derivatives that show biostimulatory properties and are also safe to use. In the current study, we evaluated the effects of gellan gum and its depolymerized form oligo-gellan, on growth and antimicrobial activity of two ornamental species Eucomis bicolor and Eucomis comosa used in natural medicine. The biopolymers were applied in the form of bulb coating prepared by using polyelectrolyte complexes. In both species investigated, gellan gum and oligo-gellan enhanced the fresh weight of leaves and bulbs, the performance of the photosynthetic apparatus, and the leaf content of basic macronutrients. In comparison with the control, the plants treated with oligo-gellan accumulated more biomass, were first to flower, and had the highest leaf content of potassium. The extracts from the bulbs treated with gellan gum and oligo-gellan showed higher effectiveness in reducing the count of Bacillus atrophaeus, Escherichia coli, and Staphylococcus aureus than those from the bulbs not treated with the polysaccharides. The research described here largely expands our current knowledge on the effects of gellan gum derivatives and has a huge practical potential in agriculture production.

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Section: Discussionsupporting

confidence: 90%

Exopolysaccharide Gellan Gum and Derived Oligo-Gellan Enhance Growth and Antimicrobial Activity in Eucomis Plants

2018

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“…The findings of the present study can be corroborated by those conducted on opium poppy , lemongrass , and Artemisia (Aftab et al, 2016). The positive effect of ISA application on NR activity was also reported by Naeem et al (2015) and Dar et al (2016) in periwinkle and fenugreek, respectively.…”

Section: Discussionsupporting

confidence: 88%

“…Low-molecularweight oligomers obtained by irradiation-mediated depolymerization of the natural polysaccharides (such as sodium alginate, chitosan, and carrageenan) have been reported to act as plant growth promoting substances and are believed to act in the same way as PGPs (El-Rehim, 2006;Mollah et al, 2009;Aftab et al, 2016;Dar et al, 2016;Idrees et al, 2016;Ahmad et al, 2017;Naeem et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…It is speculated that after gamma irradiation these oligosaccharides bind to certain receptor proteins inducing different signaling pathways, thereby eliciting the improved growth and yield in plants (El-Mohdy, 2012). The present experiment was conducted considering the growthtriggering effect of these oligosaccharides in various other MAPs Idrees et al, 2014;Naeem et al, 2015;Aftab et al, 2016;Dar et al, 2016). Foliar application of ISA showed remarkable effects on growth characteristics, physiological attributes, and EO content and yield of vetiver (Table 1).…”

Section: Discussionmentioning

confidence: 99%

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Regulation of functional activities and essential oil production in Vetiveria zizanioides L. Nash after γ-irradiated sodium alginate elicitation

Shabbir¹,

Khan²,

Sadiq³

et al. 2017

Turk J Biol

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Upon irradiation, marine polysaccharides undergo depolymerization, leading to formation of oligosaccharides that elicit various biological activities in plants. Taking a step further on the previously established growth-promoting activity of irradiated sodium alginate (ISA), structural rearrangements in ISA were analyzed using complementary techniques to develop an understanding of the structure-property relationship. The essential oil (EO) of vetiver (Vetiveria zizanioides L. Nash) immensely benefits the perfumery industry, proving itself as an economically important crop. A pot experiment was designed to test the effect of water-soluble ISA fractions on the growth, physiology, and EO production of vetiver. The structural characterization of radiation-induced sodium alginate was carried out using SEM, FT-IR, and UV-Vis spectroscopy. Of the various treatments employed, ISA-120 (ISA applied at 120 mg L -1 ) proved the best for most of the parameters studied, including fresh and dry weight of plants and photosynthetic attributes. As compared to the control (water-spray treatment), foliar feeding of ISA-120 resulted in an increase of 21.2% in chlorophyll content, while this treatment enhanced the chlorophyll fluorescence by 21.8% at 300 days after transplanting. Application of ISA-120 also increased the EO content by 21.1% and EO yield by 47.6%. Gas chromatography revealed an increase of 30.1% and 92.6% in the values of content and yield of khusimol, respectively, over the control.

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“…Alginate depolymerization by radiation does not need special control of temperature, environment, or additives (Abd Ei‐Mohdy, ). Through the adjustment of dose and dose rate, alginate hydrolysate AOS with different MW can be produced by gamma irradiation (Dar, Uddin, Khan, Ali, & Varshney, ; Hien et al., ; Le Quang, Nagasawa, Vo, Nguyen, & Nakanishi, ). Under the irradiation of Co 60 source, alginate MW rapidly decreased from 9.04 × 10 5 to 1.43 × 10 4 Da with irradiation dosages of up to 50 kGy (Luan et al., ).…”

Section: Production Of Aosmentioning

confidence: 99%

Alginate Oligosaccharides: Production, Biological Activities, and Potential Applications

Liu

Yang

et al. 2019

Comp Rev Food Sci Food Safe

226

121

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Alginate, a group of polyuronic saccharides, has been widely used in both pharmaceutical and food industries due to its unique physicochemical properties as well as beneficial health effects. However, the potential applications of alginate are restricted because of its low water solubility and high solution viscosity when significant concentrations are needed, particularly in food products. Alginate oligosaccharides (AOS), oligomers containing 2 to 25 monomers, can be obtained via hydrolysis of glycosidic bonds, organic synthesis, or through biosynthesis. Generally, AOS have shorter chain lengths and thus improved water solubility when compared with higher molecular weight alginates of the same monomers. These oligosaccharides have attracted interest from both basic and applied researchers. AOS have unique bioactivity and can impart health benefits. They have shown immunomodulatory, antimicrobial, antioxidant, prebiotic, antihypertensive, antidiabetic, antitumor, anticoagulant, and other activities. As examples, they have been utilized as prebiotics, feed supplements for aquaculture, poultry, and swine, elicitors for plants and microorganisms, cryoprotectors for frozen foods, and postharvest treatments. This review comprehensively covers methods for AOS production from alginate, such as physical/chemical methods, enzymatic methods, fermentation, organic synthesis, and biosynthesis. Moreover, current progress in structural characterization, potential health benefits, and AOS metabolism after ingestion are summarized in this review. This review will discuss methods for producing and modified AOS with desirable structures that are suited for novel applications.

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Modulation of alkaloid content, growth and productivity of Trigonella foenum-graecum L. using irradiated sodium alginate in combination with soil applied phosphorus

Cited by 19 publications

References 59 publications

Exopolysaccharide Gellan Gum and Derived Oligo-Gellan Enhance Growth and Antimicrobial Activity in Eucomis Plants

Exopolysaccharide Gellan Gum and Derived Oligo-Gellan Enhance Growth and Antimicrobial Activity in Eucomis Plants

Regulation of functional activities and essential oil production in Vetiveria zizanioides L. Nash after γ-irradiated sodium alginate elicitation

Alginate Oligosaccharides: Production, Biological Activities, and Potential Applications

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