Study of interaction effect between triacontanol and nitric oxide on alleviating of oxidative stress arsenic toxicity in coriander seedlings

Abstract

In this study, triacontanol (TRIA) and nitric oxide (NO) interaction on arsenic (As)-induced oxidative stress tolerance in coriander (Coriandrum sativum L.) plants was investigated. The results showed that As had a significant adverse effect on the plant's biomass. The seedlings pretreated with TRIA and NO significantly increased growth reduction induced by the metalloid. The obtained results indicated that the application of TRIA and sodium nitroprusside (SNP) generally reduced oxidative markers such as of electrolyte leakage percentage, malondialdehyde and H 2 O 2 contents under As toxicity, while application of As treatment without TRIA + SNP increased these oxidative parameters compared to the control. The non-enzymatic antioxidant contents such as total phenol, anthocyanin, carotenoid, ascorbic acid and reduced glutathione (GSH) were extracted and assayed from both control and treated plants. It was found that TRIA + SNP treatments have a profound effect on the antioxidant metabolism and caused an enhancement in non-enzymatic antioxidant potentials under As toxicity in coriander. Moreover, the results revealed a mutually amplifying reaction between TRIA and NO in reducing As-induced damages.ARTICLE HISTORY

Multi-Component Antioxidative System and Robust Carbohydrate Status, the Essence of Plant Arsenic Tolerance

“…The difference between our results and that of Saha et al [77] could stand on species-specific reactions of proline upon metal stress as tobacco under cadmium also did not enhance leaf proline levels even after 25 days of treatment [78]. Phenolic compounds enhance antioxidant enzyme activities and serve as antioxidants themselves [55], probably also due to their readiness to chelate metals [27]. In our study, the phenolic compound contents tended to increase at both As levels in the leaves of both genotypes.…”

“…Anthocyanins are also an important sink of photosynthates, and in SYL, photosynthesis was disturbed at 30 µg l −1 . In Coriandrum, a decrease of antioxidant contents, including anthocyanins, was found under As treatment, therefore Coriandrum is probably a sensitive plant [27]. In tolerant tomato, Kumar et al [84] found increased anthocyanins accompanied by an increase in carotenoids.…”

“…In the context of arsenic stress, it is important to note that it induces the production of reactive oxygen species (ROS) [16,[24][25][26]. To protect themselves, plants have developed sophisticated defensive mechanisms, including the action of antioxidant enzymes (superoxide dismutase, catalase, peroxidases like ascorbate peroxidase and glutathione-S-transferase) and antioxidant molecules (e.g., phenolic compounds, ascorbate, glutathione, and proline) [27]. Among the most important free-radical quenchers, carbohydrates, particularly sucrose, raffinose family oligosaccharides, or fructans, can also eliminate the most reactive ROS, hydroxyl radical (OH•), which cannot be directly quenched by antioxidant enzymes [28].…”

Effects of Megafol on the Olive Cultivar ‘Arbequina’ Grown Under Severe Saline Stress in Terms of Physiological Traits, Oxidative Stress, Antioxidant Defenses, and Cytosolic Ca2+

“…One of the worst effects of salt toxicity is the overproduction of ROS which alter the cellular redox balance, thus generating oxidative stress ( Del Buono et al, 2020 ). ROS negatively impact on cells ( Asadi Karam et al, 2017 ; Boari et al, 2019 ) and are generated during photosynthesis and respiration because of intense electron flux ( Liang et al, 2018 ). However, they can also act as signals involved in controlling decisive processes related to plant development and growth ( Bulgari et al, 2019 ).…”

Phthalanilic Acid with Biostimulatory Functions Affects Photosynthetic and Antioxidant Capacity and Improves Fruit Quality and Yield in Cowpea (Vigna unguiculata (L.) Walp.)

“…Apart from the mixture, some small molecules, showing biostimulatory effects, positively alert physiological and biochemical processes, including seed germination, root nodulation formation of legume crops, light utilization, crop nutrient absorption, and adverse stresses tolerance [14][15][16][17][18]. Triacontanol promoted growth, photosynthetic capacity [19], and functioned as an antioxidative agent through inhibiting peroxidative damage of cellular proteins and lipids [20]. Brassinolide application improved the drought tolerance in maize through modulation of enzymatic antioxidants and leaf gas exchange [21].…”