Abstract: Among abiotic stresses drought is a major detrimental factor all over the world. The present study was designed to investigate the influence of seed priming with proline under drought stress. The seeds of two varieties of maize (---------) were grown in control and drought stress condition under the exogenous application of proline as seed priming with varying regimes (0, 200, 400 ppm). Both varieties differ in terms of drought tolerance. The biomass production was reduced due to drought stress but proline enhanced the biomass production in terms of shoot and root fresh and dry organs at the 400 ppm as compared to other regimes. The cholorophyll “a”, “b”, “a/b” and “a+b” content was reduced under drought stress while 400 ppm pre-soaked proline enhanced the cholorophyll “a”, “b”, “a/b” and “a+b” content in shoot organ of both varieties. Total protein and aminoacid content in leaf was greatly affected due to drought stress but seed primed with proline @400 ppm enhanced the production of total protein and amino acids in leaf organ of both varieties. SDS-PAGE protein profiling showed that 200 ppm concentration of proline was most effective in both varieties. Among both varieties the variety “Hay Corn” is most tolerant toward the drought stress.
Rukhsana Qamar, Sibgha Noreen, Muhammad Safdar and Masroor Ellahi Babar, 2020. Influence of Exogenous Application of Proline on Some Physio-Biochemical Parameters of Maize (Zea mays L.) Under Drought Stress. Research Journal of Biological Sciences, 15: 53-59.