Response of Jatropha integerrima Plants Irrigated with Different Levels of Saline Water to Nano Silicon and Gypsum

Abstract

An open field experiment was carried out during 2015 and 2016 seasons at the experimental nursery of the Ornamental Horticulture Department, Faculty of Agriculture, Cairo University, Egypt. The purpose of present research was to investigate the effect of foliar application of nano silicon with different concentrations and gypsum soil application on growth, flowering and chemical constituents of Jatropha integerrima plants irrigated with different levels of saline water. The concentrations of saline water were (1000, 2000 and 4000 ppm), in addition to tap water (270 ppm) as a control, simultaneously plants were received monthly foliar application of nano silicon 1 and 2 mM or soil application of gypsum at 20 g/plant, either applied individually or in combination.The results showed that, elevating salt concentration in irrigation water decreased vegetative growth characteristics, flowering traits, leaves anatomy and chemical constituents. In contrast, increasing salinity of irrigation water boosted contents of proline, Ca%, Na%, Cl%, total phenolic and flavonoids. On the other hand, foliar application of nano silicon and soil addition of gypsum treatments either individually or in combination had favorable effects on enhancing vegetative parameters and chemical constitutes, meanwhile decreasing accumulation of Na%, ISSN 2166-0379 2017 http://jas.macrothink.org 137 Cl%, total phenolic and flavonoids in leaves. It can be concluded that, foliar spray of nano silicon combined with soil addition of gypsum was the best effective and economic treatment recommended for mitigating the harmful effect of salinity stress on Jatropha plants irrigated with saline water at concentration up to 4000 ppm. Journal of Agricultural Studies

A Global Metabolic Map Defines the Effects of a Si-Based Biostimulant on Tomato Plants under Normal and Saline Conditions

“…In addition, reports have shown that Si treatment results in short-term accumulation of phenolics followed by a subsequent decline, signalling Si formulation-induced mitigation of salt stress effect, and hence stress alleviation [75,103]. In line with our findings, studies have also reported a Si-mitigated decline in the content of phenolics in salt-stressed apples and Jatropha integerrima, respectively [104,105]. In conclusion, application of Si-based formulations on salt-stressed plants confers higher tolerance thereof via accumulation of phenolics which, in turn, activate defence-related proteins, repair and regulate photosynthetic apparatus, scavenge ROS, inhibit ROS-producing enzymes as well as activate antioxidant enzymes.…”

The Efficiency of The Foliar Application Using Silica and Silver Nanoparticles on Duranta erecta under Salinity Conditions

“…On the opposite, higher significant values of Na and Cl % resulted from the control plants in the two seasons. These results agree with those of Ashour (2017) who reported that SiO2NPs foliar application (1 and 2 mM) had positive effects on chemical constituents, at the same time reducing the accumulation of Na + and Cl -% in Jatropha integerrima. Also, Salachna et al (2019) found that 100 ppm AgNPs gave the highest values of chl.…”