Yeast Extract and Lithovit Mineral Fertilizer Ameliorate the Harmful Effects of Drought Stress in Wheat

Abstract

T HE effects of two levels of drought stress (25% and 50% of FC) and the control (75% FC) on the growth, some physiological processes and some metabolites in wheat (Triticum aestivum, cv. Masr 2) at seedling (30 days), vegetative (65 days) and yield (160 days) stages were studied. The ameliorative effects of the foliar spray for the harmful effects of drought by the bio-stimulant yeast extract (10%) or the mineral fertilizer lithovit (3.8%) were also studied. The results showed that both levels of drought stress decreased all of the measured growth criteria and chl a and chl b at both growth stages. The foliar spray with yeast extract or lithovit resulted in the alleviation of these inhibitory effects. Carotenoids increased with drought stress but decreased using both foliar spray treatments. Carbohydrates and total soluble proteins decreased under both drought levels, but using yeast extract or lithovit treatment alleviated these effects. Higher activities of catalase, peroxidase and ascorbic oxidase were recorded under the two stress levels, while yeast extract and lithovit treatments inhibited them. At yield stage, both drought levels resulted in severe reduction in all yield parameters, carbohydrates and total soluble proteins contents in the produced grains. Foliar spray with yeast extract or lithovit improved all the measured parameters of yield and increased the contents of the metabolites in the grains. Although lithovit was slightly more effective than yeast extract, the latter treatment seems preferable as it is a natural product with no apparent residual effects on plants and soil.

Effect of Various Environmental Factors and Treatment with Ascorbic Acid on Several Physiological Attributes in Wheat (Triticum aestivum L.)

“…Ascorbic acid (vitamin C) is one of the most common and essential vitamins due to its protective role, as it regulates various physiological processes in plants, as it performs a variety of functions such as being a major oxidation and reduction factor for enzymes involved in multiple processes including hormone biosynthesis and photosynthesis, respiration (Ortiz-Espín et al, 2017). Kasim et al (2020) observed a significant decrease in the chlorophyll content of wheat varieties when subjected to waterstress, and this decrease increased with increasing the level of water stress. The study Hussein & Khursheed (2014) about the effect of spraying ascorbic acid on the growth characteristics and some components of wheat crops exposed to drought stress conditions was determined.…”

Impact of Bio-Chemical Phosphorus Fertilization and Lithovit Regimes on Some Qualitative Traits of Various Berseem Varieties

“…Lithovit (manufactured by Zeovita-GmbH, Berlin, Germany) and quantitatively was analyzed by Wichmann and Basler (2006) as well as Wedad Kasim et al (2020). It is the first CO 2 foliar nano-fertilizer that can be applied successfully in bare fields and under glass.…”

Foliar Application of Zinc and Potassium Mitigates the Effect of Salt Stress on Wheat

“…of Economy, 2021). In Egypt, overall wheat output is insufficient to meet local demand, necessitating the immediate maximization of wheat crop production because local production is insufficient to meet annual requirements (Kasim et al, 2020). Furthermore, according to the Economic Affairs Annual Report (2017), total wheat consumption is increasing dramatically due to overall population growth of around 2.5 % per year.…”