Vegetative growth, chemical composition, and flavonoids content of Azadirachta indica plants as affected by application of yeast natural extract

Abstract

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.

Effect of Bio-Fertilizers, Plants Extracts and Active Dry Yeast on Marjoram Plants.

“…While there was no significant difference between spraying the plants with active dry yeast or Allium sativum extract in the two cuts in both seasons. This was supports the results of Ahmed (2009) on Melissa officinalis, Nassar (2015) on basil, Matter and El Sayed (2015) on caraway and Taha et al (2016) on Azadirachta indica plants.…”

“…Moreover, the increments in NP as a result of active dry yeast and Allium sativum extract application may be attributed to their favorable effect on marjoram plants growth (Tables 1 and 2) as mentioned earlier (Ahmed, 2009). Some reviewers conformed the present findings using other medicinal and aromatic plants; for instance, Nassar (2015) on basil, Matter and El Sayed (2015).on Caraway and Taha et al (2016) on Azadirachta indica plants.…”

Effect of Chicken Manurefertilization, Active Dry Yeast Foliar Spray Concentrations and Their Interaction on Lavander (Lavandula Officinalis, Chaix) Plants Growth and Productivity

“…For the interaction effect of chicken manure (ChM) % with dry yeast spraying concentrations data clear that 100 % from the recommended N rate as chicken manure (ChM)with spraying lavender plants with 200 ppm dry yeast resulted in significant enhancement on total nitrogen, phosphorus and potassium percentage (%) of the two seasons. These results are similar with those found by Taha et al, (2016) studied the effect of foliar spraying plants with dry yeast (Saccharomyces cerevisiae) extract at various Concentrations (0,5, 10, 15 and 20%) on nitrogen content. Results suggested that nitrogen content was enhanced and recorded the maximum value in plants treated with dry yeast extract at 10%.…”

“…The obtained results were similar as found by Mohamed et al, (2017) on Ocimum basilicum, L. var Genoves plant they reported that fresh and dry weights increased especially the interaction treatment between chicken manure20 m 3 / fed. with yeast extract 100 M/ L in the two cuts and in the Taha et al, (2016) studied the effect of foliar spraying neem plants with dry yeast (Saccharomyces cerevisiae) extract at different concentrations (0, 5, 10, 15 and 20%) on growth. Results showed that growth parameters increased significantly by spraying plants with yeast extract at 15%.…”

Effect of Jasmonic Acid, Yeast Extract Elicitation, and Drying Methods on the Main Bioactive Compounds and Consumer Quality of Lovage (Levisticum officinale Koch)

“…Yeast extract is a very interesting natural plant inducer due to its role in producing some growth regulators, as well as its ability to act as a biostimulant of plant growth or the biosynthesis of plant pigments and some other bioactive compounds [3,4]. For example, in a study conducted by Zlotek et al [5], yeast extract (0.1% and 1%) elicitation increased the level of phenolic compounds and chlorophylls in lettuce leaves.…”