Positive effects of nitric oxide onSolanum lycopersicum

Abstract

The present work examines benzoic acid (BA) induced stress in Solanum lycopersicum and explores the possible mechanism through which sodium nitroprusside (SNP) protects plants. Tomato seeds were soaked for 3 h in 250 mM SNP and 0.5, 1.0, and 1.5 mM BA with and without SNP. Seeds soaked in distilled water were treated as control. Seed germination (SG) and radicle length (RL) were recorded in Petri plate culture. SG and RL inhibition was concentration dependent in BA. SNP enhanced SG and RL. Twenty-one-days old seedlings were grown in hydroponic culture in Hoagland solution and BA at 0.5, 1.0, and 1.5 mM with and without SNP. The morphological and biochemical parameters of seedlings were assayed. Average growth rate of root and shoot, dry weight, sugar, pigment and protein content, and activity of nitrate reductase decreased in seedlings treated with BA while increased in SNP with and without BA. Lipid peroxidation increased in seedlings treated with BA but decreased in BA 'SNP. SNP protected the seedlings against BA induced oxidative stress by scavenging reactive oxygen species. SNP demonstrated a positive role against BA toxicity which was evident from increased activities of antioxidant enzymes.

Sodium silicate mediated response of antioxidative defense system in <em>Lycopersicon esculentum</em> mill. under water stress

“…The reduced nitrate reductase activity could be attributed to a decreased nitrate absorption by tomato plant roots due to dehydrated soil and transport of reduced nitrate from the roots to the leaves which consequently decreased the foliar nitrate concentration as reported in previous researches [85,86]. The reduced photosynthetic rate or inhibited synthesis or low induction of enzymes may be responsible for reduction in nitrate reductase activity [87].…”

Biologically Active Compounds of Plants: Structure-Related Antioxidant, Microbiological and Cytotoxic Activity of Selected Carboxylic Acids

“…Malondialdehyde (MDA) is one of several low-molecular weight products of lipid peroxidation. The monitoring of MDA levels in biological systems is presently regarded as an important indicator of lipid peroxidation and peroxidative tissue injury [ 119 ]. The assay is based on a condensation reaction of two molecules of 2-thiobarbituric acid (TBA) with one molecule of MDA, which is carried out at low pH and elevated temperature and results in generation of a red, fluorescent adduct.…”

UV-B radiation escalate allelopathic effect of benzoic acid on Solanum lycopersicum L.

“…C. Bano et al Scientia Horticulturae 220 (2017) 199-205 effectively reduce protein content. Nitrate reductase activity decreased in the seedlings under the influence of UV-B (Quaggiotti et al, 2004;Rajendiran and Ramanujam, 2006) and BA (Singh et al, 2014). The declined NR activity may be related with change in protein synthesis and degradation or inactivation of the enzyme (Plaut, 1974;Rajendiran, 2001).…”