Growth-promotion of plants with depolymerized alginates by irradiation

Comparative study on wheat grains produced from plants treated by irradiated sodium alginate and stored in refrigerator with newly planted on vitality, quality, and their resistance to lesser grain borer (Rhyzopertha dominica)

“…Soluble sugar and total carbohydrates increased unpon spraying plants by (T 3 ) that may be du to increase in photosynthesis rate.Similar conclusion in rice obtained by Hien et al (2000); they noticed a significant enhancement in net-photosynthesis and CO 2 assimilation as a result of application of depolymerized SA. Also, Afatab et al (2011) stated that the application of ISA might improve photosynthetic capacity and photosynthetic pigments.…”

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

“…Depolymerization of sodium alginate (powder form) requires high irradiation doses (El-Mohdy, 2012) and the change in the molecular weight of alginate (if any) as a result of radiation-based degradation is estimated by GPC (Hien et al, 2000). The GPC profile helps in unraveling the gamma radiation-mediated depolymerization of polysaccharides as a result of chain scission of the complex natural polysaccharide.…”

Effect of Gamma Irradiated Sodium Alginate on Selective Crops as Plant Growth Promoter and Bug control action.

“…Actually irradiation can modify the viscosity molecular weight, hydrophilic and mechanical properties of alginates resulting in enhance properties. Sodium alginate also acts as signal molecules that regulate growth and development of the plant as well as defense reactions by regulating gene expression [2,3] and thus plant increase support happen. In the case of irradiated SA it is supposed that irradiated SA acts on the cell membrane in such a way that enzyme(s), or secondary messenger(s) [L (+) -adenosine] could trigger the cascading effect, which might result in increased plant metabolism and accumulation of various critical intermediary metabolic compounds, leading to improved growth of the plants.…”

“…Such type of biologically active oligosaccharides, derived from sodium alginate, have been known to act as signal molecules that govern plant growth and development and defense reactions by regulating gene expression [2,3] . SA is a natural polysaccharide, derived from brown algae and is available in large quantities.…”

“…Application of ionizing radiation to degrade this natural bioactive agent and then using as growth promoting substances is an emerging technology to exploit full genetic potential of crops in terms of growth, yield, and quality [4] . Compared to the conventional techniques such as acid/base hydrolysis and enzymatic methods [5] ,radiation processing of bioactive agents by Co-60 gamma rays offers a clean one-step method for the formation of low molecular weight oligomers of SA, called oligoalginates [3].Indeed, foliar application of the degraded oligomers has been proved to stimulate various biological and physiological activities, including plant growth [1][2][3][4]6] , shoot elongation [3,7] , root growth [8] , flower production, antimicrobial activity, amelioration of heavy metal stress, synthesis of phytoalexins etc. [9][10][11][12] .…”