PJB-2020-362
FOLIAR APPLICATION OF PHOSPHORUS ENHANCES PHOTOSYNTHESIS AND BIOCHEMICAL ATTRIBUTES OF MAIZE UNDER WATER LIMITATIONS
ZAHOOR AHMAD
Abstract
Water is essential for the growth period of crops; however, unavailability of water badly affect the growth and physiological attributes which leads to reasonable reduction in yield characters of crop. Based upon the aim, present pot study was accomplished to check the influence of foliar phosphorus (P) practice on morphology, gas exchange, biochemical characteristics and phosphorus use efficiency of plants under normal as well as water deficit situations in Department of Agronomy, University of Agriculture Faisalabad, Pakistan in 2014. Two different treatments (control and P @ 8 kg ha-1) and four hybrids (Hycorn, 31P41, 65625 and 32B33) of maize were tested by using randomized complete block design (RCBD) with three replications. Results showed that the water stress caused a remarkable decline in TSP (9.7%), A (9.4%) and E (13.4%), gs (10.2%) and Ci (20.4%) comparative to well-watered control. An increase of 37.1%, 36.8% and 24.5% was measured for biochemical characters of proline, TSS and TFA respectively. However, the foliar P application minimized the negative impact of drought by improving the growth of plants; physio-biochemical attributes PUE in maize plant under both normal as well as water stress conditions. Among all hybrids of maize, the hybrid 6525 performed better under both conditions of stress and non-stress. These outcomes confirmed that the exogenous P application give outstanding performance in improving growth of plants by regulating the process of physio-biochemical activities in maize plants and enhancing the PUE which encourage enhanced drought tolerance in maize plants
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