Effects of Polyethylene glycol (PEG) simulated drought stress on physio-agronomic characteristics in Myhco variety of Sorghum bicolor L

The present study was aimed at determining the differential interactive effects of Ca/Mg quotient and PEG-simulated drought in Sorghum bicolorat the vegetative stage.Sorghum bicolor collected variety Myhco from Persabaq Nowshera were sown in earthen pots (lower inside diameter, 18cm upper inner diameter, 20 cm height and 2 cm thickness) filled with 2 kg of air-dried soil and silt (2:1) having pH, moisture content and field capacity in triplicates in the green house of the Department of Botany, University of Peshawar in 2019. The designed experiment contains seven treatments each having three replicates, among these treatments first three are control, the second three are treated Ca/Mg quotient 4+PEG0.6 Ca/Mg quotient 4+PEG0.2, Ca/Mg quotient 2+PEG0.6, Ca/Mgquotient 2+PEG0.2, Ca/Mg quotient 0.18+PEG0.6 Ca/Mg quotient 0.18+PEG0.2, while the last three treatments are treated Ca/Mg quotient 0.18+PEG0.2. Conclusions We conclude that there is a reduction in the agronomy,i.e., leaf area, leaf fresh and dry weight,and asimilar reduction also occurred with all other vegetative parts. There is a clear difference between control and PEG drought,and a greaterreduction is observed in 0.6 MPa drought. The biochemical characters were also affected in the same manner;a clear reduction was observed in chlorophyll, sugar,and protein, and occurred while the Ca/Mg quotient hadno significant effect on Sorghum bicolorL.in Varity myco.