Document Type : Research Article
Authors
1
Botany Department, Faculty of Science, Mansoura University, Egypt
2
Botany Department, Faculty of Science, Mansoura University, Mansoura, Egypt
10.21608/mjb.2020.460387
Abstract
A pot experiment was conducted to assess the effects of three concentrations of folic acid (5,10&20 mM); through two applications, soaking or spraying on the growth and biological activities of spinach (Spnancia oleracea), lettuce (Lactuca sativa) and chorchorus (Chorchorus olitorius) during vegetative stage. The obtained results cleared that, Soil texture changed from clay silty in the untreated plants into clay loam by soaking the seeds of the used plants in folic acid the water holding capacity and porosity decreased by folic acid treatments. Although pH, Cl, Na and Ca decreased by folic treatments, EC, organic matter, CaCO3, HCO3, SO4, K and Mg increased, as compared to the untreated soil. Fresh and dry weight of the test plants either decrease or increase but, water percentage, generally decreased by folic applications. At most, pigments, total carbohydrates, nitrogen, protein and phenol increased while alkaloids decreased, in response to folic treatments.
Treatment with folic acids decreased PPO and increased CAT and POX activity in Spinancia oleracea but in Lactuca sativa, no change detected in PPO activity but the of CAT and POX decreased. In Chorchorus olitorius, treatment with folic, more or less have no change; or slightly increase the activity of PPO, CAT and POX compared to the control value. An increase in K, Ca & Mg and decrease in Na content in the three used plants was observed in response to folic applications. Foliar application of folic acid (spraying) was most effective than pretreatments (soaking) also, the most response by folic addition was in case of Chorchorus olitorius.
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