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Riboflavin (vitamin B2) priming modulates growth, physiological and biochemical traits of maize (Zea mays L.) under salt stress

Nosheen Iftikhar And Shagufta Perveen

Abiotic stresses are more often to occur because of poor drainage system resulting in agricultural land contaminations. Salt stress is one of the abiotic stresses which highly effects the growth and yield of cereal crops especially maize (Zea mays L.). The current experiment following completely randomized design (CRD) along with three replicates of each treatment was performed in the Botanic Garden, Government College University, Faisalabad to evaluate the effect of salt (70 mM NaCl) stress on maize (Zea mays L.) plants raised from seeds treated with riboflavin (RF). The temperature range in whole experiment was 30°C - 43°C. This study appraised riboflavin (0, 50 and 75 ppm) role in stress effect mitigation by enhancing growth, enzymatic (SOD, POD, CAT, APX and GPX) and non-enzymatic (flavonoids, phenolics and anthocyanin) antioxidant activities, and by scavenging ROS (MDA, H2O2) effect and maintaining osmotic level. Salt (70 mM NaCl) subjected plants showed reduced growth and photosynthetic rate, while increased ROS production (more in Sadaf compared to Pearl). Riboflavin is a novel vitamin which can be used to treat the salinity stress effected plants. Seed priming with RF (vitamin B2) significantly reduced salt stress effects by enhancing growth rate, photosynthesis, increased osmolytes accumulation and improved antioxidant defense system, while decreasing oxidative stress (MDA and hydrogen peroxides). Plants raised from seeds treated with riboflavin showed a significant increase in total leaf area, total free proteins and total soluble sugars than plants without riboflavin application. Gradual increase in RF concentration showed more improved growth under salt stress.  

To Cite this article: Iftikhar, N. and S. Perveen. 2024. Riboflavin (vitamin B2) priming modulates growth, physiological and biochemical traits of maize (Zea mays L.) under salt stress. Pak. J. Bot., 56(4): DOI:  

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