This experiment was carried out during 2013 and 2104 seasons on Azadirachta indica plants at National Research Centre greenhouse, Egypt. Experiment studied the effect of foliar spraying plants with dry yeast (Saccharomyces cerevisiae) extract at various concentrations (0, 5, 10, 15 and 20%) on growth, pigments, NPK (%), total soluble sugars, indoles, phenols and flavonoids leaves contents. Results showed that spraying neem plants with yeast extract at 15% significantly increased growth parameters (plants height, stem and root fresh and dry weights) and enhanced total chlorophylla, phosphorus, potassium and total soluble sugars content. Using the concentration 5% of dry yeast extract gave the highest values of chlorophyll b, total carotenoids and total chlorophyll content. Nitrogen content was produced at the highest value (3.55%) in plants treated with dry yeast extract at 10%.The foliar application of yeast extract at 10, 15 and 20% resulted the highest values of total soluble phenols (72.48, 72.27 and 73.46 mg/g D.W., respectively). The highest flavonoids leave content (3.23 and 3.14 mg CE/g D.W.) were obtained when the dry yeast extract was used at 15 and 20%, respectively. On the other hand, all treatments had no significant effect on stem diameter, number of leaves /plant and root length.
T HIS study deals with the effect of glutamic acid and the reuse of chemically treated wastewater on the chemical constituents of Coreopsis tinctoria Nutt Plants in a batch-pot experiment. This chemical constituent includes the nutrient elements (N, P, K), micronutrient elements (Fe, Mn), sodium, as well as heavy metals (Cd, Cu, Zn). In this study different doses of glutamic acid were examined in combination with different types of treated wastewater to investigate the environmental stress on Coreopsis tinctoria Nutt Plants. The study was conducted during the two successive seasons of (2015/2016-2016/2017) in the greenhouse of National Research Centre, Cairo, Egypt, aimed to study the response of Coreopsis tinctoria plants to glutamic acid application at four chemical concentrations (0, 50, 100 and 150 ppm) as well as the effect of treated wastewater as a source of irrigation. Besides, this investigation includes the impact on growth and flowering of Coreopsis tinctoria plants. The physical and chemical characteristics of the treated wastewaters were investigated and reused to determine the beneficial advantages as an additional water resource. It was concluded that Glutamic acid and irrigation with three types of treated wastewater effluents individually induced favorable changes in Coreopsis tinctoria Nutt plants in terms of chemical constituents, vegetation and flowering. Thus, the effluent of the chemically treated municipal wastewater can be reused safely without any side effect. Meanwhile, type of treatment has an important effect on the final chemical characteristics of the treated wastewater, particularly the nutrient elements and heavy metals. The reuse of treated wastewater is the most important challenge in the near future to increase the water budget in Egypt as the population escalating and the stringent need for more cultivated land. Consequently, the need for extra safe water resources should be supplied.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.