Effect of Seed Soaking and Foliar Spraying With Selenium on the Growth and Yield of Lettuce Under Saline Stress

Abstract

he implementation of proper agricultural practices is important for reducing the effect of salt stress in plants. Therefore, this experiment was conducted in 2014/2015 and 2015/2016 seasons at Ras Sudr station of Desert Research Center, South Sinai Governorate, Egypt, to determine the most effective selenium (Se) dose and application method on lettuce plants Bruma cultivar under salt stress conditions. Six different Se treatments; Se0 (without application as a control), Se1 (seed soaking in 30 µmol l -1 for 12 h), Se2 (seed soaking in 50 µmol l -1 for 12 h), Se3 (foliar application of 10 µmol l -1 ), Se4 (foliar application of 20 µmol l -1 ) and Se5 (foliar application of 30 µmol l -1 ) were applied. The results showed that Se provision through both of the tested methods improved the plant leaf number, chlorophyll content, as well as N, P, K and Ca concentrations in the leaves, when compared with the control treatment. Moreover, Na content decreased in the leaves, which were treated than those of the control treatment. The plants grown under the Se treatments had larger heads and higher yields than the untreated plants. Foliar spraying was the most effective method of Se application of the lettuce plants, and the best results were obtained with the foliar spraying treatment at 20 µmol l -1 sodium selenate. These results suggest that applying the appropriate dose of Se via foliar spraying has the potential for use as an efficient and practical method of improving plant growth and enhancing salt-stress resistance in lettuce plants.

The Contribution of Nano-Selenium in Alleviation of Salinity Adverse Effects on Coriander Plants

“…Generally, selenium nanoparticle application by foliar spraying resulted in higher contents of dry matter, N and K in the coriander plants under saline stress which has a positive impact on the permeability and activity the cellular membrane, redistribution of some essential elements and it regulated uptake. These results are consistent with the work of (Hawrylak-Nowak, 2008;Feng et al, 2013;Abul-Soud and Abd-Elrahman 2016;Castillo-Godina et al, 2016 andShalaby et al, 2017).…”

Recent developments, applications and challenges for carbon quantum dots as a photosynthesis enhancer in agriculture

“…Examples of the photosynthesis parameters measurements are net photosynthesis rate, stomatal conductance, rubisco activity, carbohydrate content, and chlorophyll content. 7,105,113,114 The impact of CQD on plant development have been evaluated and compared to that of control plants, with the majority of the research focusing on photosynthetic enhancement. Stomatal conductance (g l ) is a measurement of the amount of stomatal opening in plants and is used to determine the amount of water in the plant.…”

Biofortification of Horticultural Crops With Selenium

“…It also induces metal (cadmium) stress tolerance in radish plants (Miao et al 2008). Later on, lettuce seeds were investigated, and results shown that selenium-soaked lettuce seeds are tolerant towards salinity and gives good growth and yield (Shalaby and Ramadan 2017). However, selenium content in biofortified plants through seed soaking is lower than other methods.…”