Effect of seed soaking with sulphydryl compounds on the photochemical efficiency and antioxidant defence system during the growth of pearl millet under water limiting environment

Abstract

Pearl millet (Pennisetum glaucum L. cv. HHB-67) seeds were pre-soaked in sulphydryl compounds (dithiothreitol, thioglycollic acid, thiourea, and cysteine). In plants at 59 and 67 d after sowing (DAS), activities of photosystem (PS) 2 (ferricyanide site) and PS1, both chloroplastic and total superoxide dismutase, glutathione reductase, and glutathione-Stransferase increased after all sulphydryl pre-treatments at both stages of plant development. Also dry matter of plant parts sampled at 55 DAS was higher after thiol-treatments in comparison with control.

Influence of seed hardening treatments on growth, gas exchange and yield parameters in black gram under drought condition

“…HHB 67 pre-soaked in sulphydryl compounds viz., dithiothreitol, thioglycollic acid, thiourea and cysteine. ( Ramaswamy et al, 2007). The above observations were in agreement with the present study.…”

ENHANCING YIELD OF CLUSTERBEAN (CYAMOPSIS TETRAGONOLOBA L. TAUB) WITH FOLIAR APPLICATION OF SULPHYDRYL COMPOUNDS UNDER HOT ARID CONDITIONS

“…Significant improvement in seed yields with -SH application in the present study could be attributed to significant improvement in yield attributes (pod number and seed per pod) due to greater photosynthesis and better partitioning of photosynthates. The enhancement of photosynthesis (Nathawat et al , 2007; Ramaswamy et al , 2007) and better partitioning of photosynthates to sink for various crop species treated with -SH compounds have been reported earlier under abiotic stress conditions (Sahu and Singh, 1995).…”

“…An increased activity of antioxidant enzymes has been correlated with decreased lipid peroxidation under stress conditions (Anjum et al , 2012), and this relationship was confirmed by our correlation analysis (Table 4). Besides antioxidant protection, the intracellular and extracellular redox states of thiols play a critical role in the stabilization of protein structure and function, regulation of enzyme activity and control of transcription factor activity (Ramaswamy et al , 2007).…”

“…Several studies support the major role of -SH compounds in modulating plant response to various abiotic stress conditions. These are reported to decrease denaturation of membrane protein (Rikin et al , 1979), improve translocation of sucrose from source to sink via phloem loading (Srivastava et al , 2008), enhance photosynthetic pigments (D’Souza et al , 2009), net photosynthetic rate (Burman et al , 2004) and N-metabolism (Garg et al , 2006) and decrease stress-induced drop in photo-system I (PS I) and photo-system II (PS II) (Ramaswamy et al , 2007) in plants under stress conditions.…”

Exogenous application of sulphydryl compounds enhances growth, photosynthetic efficiency and yield of moth bean (Vigna aconitifolia L.) under water limiting environment

“…The potential of thiol compounds in mitigation of water deficit stress in pearl millet is evident from experiments involving pre-sowing seed treatment with sulphydryl compounds such as dithiothreitol, thioglycollic acid and cysteine. These compounds could improve the activities of key enzymes of the superoxide scavenging system that involves superoxide dismutase, GR and GST (Ramaswamy et al, 2007). Previous studies confirm that thiourea and thioglycollic acid increased the plant growth under water stress condition, which might be due to increase in antioxidant activities that alleviated the stress damage (D'Souza et al, 2009;Pandey et al, 2013;Nathawat et al, 2016).…”