Various environmental stresses lead to excessive production of ros causing progressive oxidative damage and ultimately cell death. Effect of exogenous selenium supply on photosynthesis, na. Thymol confers tolerance to salt stress by activating anti. Insights into the significance of antioxidative defense under. Thymol significantly rescued root growth under salt stress. In order to distinguish the osmotic and ionic effects of salt stress on buckwheat, biochemical and molecular changes in buckwheat leaves were monitored after short exposure 2 days. Assessment of salinityinduced antioxidative defense system. Pdf salt stress regulates enzymatic and nonenzymatic antioxidative defense system in the edible part of carrot daucus carota l. We discuss the specific roles of enzymatic and non enzymatic antioxidants in relation to the oxidative load in the context of whole plant salt tolerance. Laser doppler flowmetry measurements demonstrated that skin postocclusive reactive hyperemia porh. Brassinosteroids regulate functional components of. Enhanced activity of enzymes of antioxidative defense system has been reported under drought stress in several plant species 8, 164, 165, 208. High salinity induces different oxidative stress and. Effect of salt stress on growth, chlorophyll content, lipid peroxidation and.
Thus salinity is considered as one of the most important stresses that hamper. Compared to the control, the nacl treatment caused a significant decrease in the shoot length and the fresh and dry weight of shoot. Salt stress increases the accumulation of toxic ions in chloroplasts of higher plants and is associated with decreased photosynthesis. The present study was carried out to study the effect of salt stress on cell membrane damage, ion content and antioxidant enzymes in wheat triticum aestivum seedlings of two cultivars salttolerant krl19 and saltsensitive wh542.
Observations were recorded on the 3rd and 6th day after salt treatment and 2nd day after salt. Antioxidant defense mechanisms of salinity tolerance in rice. The seedlings were raised under controlled laboratory conditions and subjected to different concentrations of. Antioxidative potentials as a protective mechanism in catharanthus roseusl. The initial field studies showed that foliar spray of s was effective for reducing cd concentration in rice and increasing the grain yield. In spite of the large number of publications on the role of antioxidative defense under salt stress, the relative importance of this process to overall plant salt tolerance is still a matter of. In order to elucidate the role of antioxidant responses in salinity tolerance in rice genotypes under salt stress, experiments were conducted using four rice. Therefore, enhanced spd levels under salt stress may be correlated with defense system against oxidative stress by maintaining membrane stability and reducing the generation of ros through the promotion of oxidant enzyme activity andor scavenging active oxygen, as well as inhibiting senescenceinduced rnase activity. Effects of silicon supplementation on wheat plants under. Pdf on sep 30, 2010, saleh l and others published antioxidative defence mechanisms in two contrasting barley genotypes under salt stress.
Jan 30, 2020 thymol significantly rescued root growth under salt stress. Microbial inoculation in rice regulates antioxidative. Antioxidative potentials as a protective mechanism in. Insights into the significance of antioxidative defense under salt stress. Under osmotic stress, the glutamate pathway is the main source of proline. Reactive oxygen species ros are produced as a normal product of plant cellular metabolism. In the present study the effect of different concentrations of nacl 0, 100, and 200 mm on growth, physiobiochemical attributes, antioxidant enzymes, oil content, etc. Salt mass balance study and plant physiological responses for. Effect of salt stress on antioxidant defense systems, lipid.
Oxidative stress and antioxidant defense in plants under salinity. Request pdf oxidative stress and antioxidant defense mechanisms in plants under salt stress salinization is a critical hazard for plants, particularly agricultural crops in irrigated and salty. Sep 15, 2016 application of plantgrowthpromoting fungi trichoderma longibrachiatum t6 enhances tolerance of wheat to salt stress through improvement of antioxidative defense system and gene expression shuwu zhang, 1, 2, 3 yantai gan, 4 and bingliang xu 1, 2, 3. Molybdenum improves antioxidant and osmoticadjustment. Antioxidative defense system, chickpea, germination, reactive oxygen species abstract. Antioxidant defense mechanism under salt stress in wheat. Assessment of salinityinduced antioxidative defense. In this salt stress altered the antioxidant enzyme activity as compared to control. Pretreatment with trichoderma in arabidopsis under salt stress showed induced expression of different transcripts having vital role in osmoregulation and oxidative stress management brotman et al. Antioxidative defense against reactive oxygen species in plants under salt stress article pdf available july 20 with 623 reads how we measure reads. Moreover, no major attempts have been made to identify the stress induced changes in free radicals and antioxidative defense system in plant under salt stress in the presence of put. Apart from proline 67, 68 no specific profiling of antioxidative metabolites has to our knowledge been reported for salt stress. Mar 16, 2020 antioxidative enzymes are ubiquitous in plant cells 85 to perform defense related action under induced oxidative stress conditions 86. It was observed that seedling growth decreased with increase in concentration of nacl and 50 mm nacl concentration was selected.
Salt tolerance is a complex trait involving the coordinated action of many gene families that perform a variety of functions such as control of. Pdf role of trichoderma harzianum in mitigating nacl. Read antioxidative defense system in pigeonpea roots under waterlogging stress, acta physiologiae plantarum on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Present research was carried out with the aim of identifying the antioxidative defense mechanism in fenugreek variety rmt1 under salt stress nacl 0. Changes in chlorophyll pigments, chlorophyll fl uorescence and leaf gas exchange characteristics, glycinebetaine. Salinity stress affected crop production of more than 20% of irrigated land globally. The alleviating effects of b on oxidative stress parameters were related to the.
The impact of presowing treatment of both 28homobrassionolide hbl and 24epibrassinolide ebl on defense system of z. Mitigation effects of nonenzymatic antioxidants in maize. The salt stress induces more reactive oxygen species. The impact of presowing treatment of both 28homobrassionolide hbl and 24. Antioxidative enzymes activities were changed, but the extent of alteration varied between two geneotypes and higher amounts of antioxidative enzymes were observed in tolerant species11. Seeds were presoaked in solutions with different salinity after sterilization. Plants have developed certain mechanisms to resist the oxidative damage caused due to salinity. The antioxidant metabolism comprising of antioxidative enzymes and metabolites will be discussed in response to combined waterlogging and salt stress.
Antioxidative defence mechanisms in two contrasting barley genotypes under salt stress livia saleh1, christoph plieth1, hanspeter mock2, karl h. Despite their destructive activity, they are welldescribed second messengers in a variety of cellular processes, including conferment of tolerance to various environmental. Salt tolerance is a complex trait involving the coordinated action of many gene families that perform a variety of functions such as control of water loss through stomata, ion sequestration, metabolic adjustment, osmotic adjustment and antioxidative defense. The expression levels of sodcc2, cata, and osprx1 genes were largely consistent with the activities of their corresponding enzymes. Biochemical and molecular changes in buckwheat leaves. Cerium oxide nanoparticles modify the antioxidative stress. Role of trichoderma harzianum in mitigating nacl stress in. Thymol ameliorated cell membrane damage, oxidative stress, ros accumulation, and cell death in roots under salt stress.
Periwinkle plants were exposed to different concentrations of salt and the effect of treatment on germination, growth parameter and antioxidative defense system investigated. Antioxidative defence mechanisms in two contrasting barley. Molybdenum fertilizer was applied at three levels 0, 0. Summary a lot of work has been done on plant physiological and molecular responses to salinity or waterlogging stresses individually. Enhancement of catalase activity under salt stress in. Potential antioxidant activities improve salt tolerance in. Antioxidative defense under salt stress europe pmc article. Plants under salinity stress cheruth abdul jaleel, ragupathi gopi, paramasivam manivannan, rajaram panneerselvam. Pdf salt stress regulates enzymatic and nonenzymatic. Comparative study of the antioxidant responses in drought tolerant and drought sensitive genotypes revealed higher antioxidant capacity in tolerant genotypes.
Different mechanisms are involved when plants respond to salt stress, namely defence against the osmotic effect of high salinity and against the ion toxicity. Reactive oxygen, nitrogen and sulfur species in plants. Antioxidative defense under salt stress pubmed central pmc. Mohammad anwar hossain and masayuki fujita, evidence for a role of exogenous glycinebetaine and proline in antioxidant defense and methylglyoxal detoxification systems in mung bean seedlings under salt stress, physiology and molecular biology of plants. We examined elicitation of sod, po, apx, catalase, gr and gpx. Our results indicated significant decreases in chlorophyll a and chlorophyll b under salt stress which is in. Antioxidant response to salinity in salttolerant and salt. Plants under stress shows some defense mechanisms to protect themselves against the harmful effect of salt stress. In this article, the generation and scavenging of reactive oxygen species reactive oxygen species subject category. Jcm free fulltext enhanced antioxidative defense by. Fingerprinting antioxidative activities in plants plant. During salinity stress, availability of atmospheric co2 is reduced because of. Antioxidative defense system, chickpea, germination, reactive oxygen species.
In this study, seedlings of pistacia vera badamia valuable crop of arid lands in central persiawere treated with different b concentrations in soil 0, 2. Gomesfilhoeffect of salt stress on antioxidative enzymes and lipid peroxidation in. Oxidative stress and antioxidant defense mechanisms in plants. Exogenous application of nonenzymatic antioxidative compounds were found to be very effective in reducing electrolyte leakage in salt stressed maize plants, and. The effects of salt stress on the activity of antioxidative enzymes and lipid peroxidation were studied in leaves and roots of two maize genotypes, br5033 salt tolerant and br5011 salt sensitive, grown under control nutrient solution or salt stress nutrient solution containing 100 mm nacl conditions. The significant increase in catalase activity may be due to h 2 o 2. Plant biomass was found to decrease at both salinity levels. Insights into the significance of antioxidative defense. Salt stress reveals differential antioxidant and energetics. Muhling3 and katja witzel2,3 christian albrechts university kiel faculty of agricultural and nutritional sciences. Seedlings 4dold were irrigated with 0, 50 and 100 mm nacl. Cerium oxide nanoparticles nceo2 have been shown to have significant interactions in plants.
Changes in antioxidant enzymes activity and plant performance by salinity stress and zinc application in soybean. Oxidative stress and antioxidant defense under combined. Though, by scavenging free radicals an active antioxidative defense system comprising enzymatic and nonenzymatic antioxidants reduces the level of oxidative stress in plant cells 9,10. Pdf regulation in some vital physiological attributes and. Mar 08, 2016 high salinity induced oxidative stress in the roots and mature leaves, but to a lesser extent in younger leaves. Pdf antioxidative defense to salt stress in trigonella. Oct 31, 2008 salt stress induced changes in antioxidant enzymes, such as catalase cat, ascorbate peroxidase apx, and glutathione reductase gr, total chlorophyll content, and lipid peroxidation measured as malondialdehyde mda content, in leaves of a green bean genotype gevas sirsk 57 gs57 and cv. Several previous publications reported the positive effects of. Tocopherol is located in cell membranes and plays an important role in the scavenging of lipid peroxyl radicals. Antioxidative defense under salt stress europe pmc. Therefore, here the objective was to asses the put potential of scavenging free radicals by antioxidative system in indian mustard seedlings under different level. Effect of salt stress on growth, chlorophyll content.
Dec 06, 2009 salt tolerance is a complex trait involving the coordinated action of many gene families that perform a variety of functions such as control of water loss through stomata, ion sequestration, metabolic adjustment, osmotic adjustment and antioxidative defense. Protective effect of foliar application of sulfur on. Salt stress is one of the most significant abiotic stresses and affects every aspect of plant metabolisms and physiology. Silicon improves growth and antioxidative defense system. The most important processes of reactive oxygen species ros production. In this study the effect of responses of catharanthus roseus to nacl stress has been explored.
Growth and productivity of plants depends on environmental conditions. Plant response to salt stress occurs in two phases. Boron enhances antioxidative defense in the leaves of salt. This study aimed to examine whether the oral supplementation of vitamins c and e during a sevenday high salt diet hs. Temperature is a key environmental factor that limits. Oxidative stress and antioxidant defense under combined waterlogging and salinity stresses. Further, the antioxidative defense mechanisms operating in the cells for scavenging of ros overproduced under various stressful conditions of the environment have been discussed in detail. Therefore, salt stress selectively affects the expression of antioxidative genes, but thymol seems to activate all of them at transcriptional level under salt stress. Nadph oxidase is one of the major generators for apoplastic ros induced by salt stress in plants ben rejeb et al. Spermidine alleviates the growth of salinestressed ginseng. The purpose of current investigation was to explore the role of brassinosteroids brs in zea mays l. Saira banoa, muhammad ashrafb and nudrat aisha akramc adepartment of botany, university of agriculture faisalabad, faisalabad, pakistan.
Thymolattenuated oxidative stress may be resulted from the activation of antioxidative capacity, including both enzymatic and nonenzymatic system. Plants have complex antioxidant defense mechanisms including. Application of plantgrowthpromoting fungi trichoderma. In present study, we evaluated the effects of jasmonic acid ja on physiobiochemical attributes, antioxidant enzyme activity, and gene expression in soybean glycine max l.
Twenty chickpea cultivars were germinated on agar based medium under control and salt stress induced by different concentrations of nacl 25, 50, 75 and 100 mm. Effect of salt stress on antioxidant enzymes and lipid peroxidation in. Interestingly, under severe stress condition 300 mm nacl, peroxidase seemed to be more crucial than catalase for peroxide scavenging. Introduction an unavoidable consequence of aerobic metabolism is production of reactive oxygen species ros. Jasmonic acid modulates the physiobiochemical attributes. A pot experiment was conducted to investigate the effect of foliar application of gibberellic acid ga 3, 288. Assessment of salinityinduced antioxidative defense system in colubrina asiatica brong sonar b.
Given the widespread environmental dispersal of nceo2, it is paramount to understand its biochemical and molecular impacts on a globally important agricultural crop, such as rice. Putrescine alleviation of growth in salt stressed brassica. Salt stress regulates enzymatic and nonenzymatic antioxidative defense system in the edible part of carrot daucus carota l. Ni stress decreases the shoot and root length and chlorophyll content by 37. Reactive oxygen species, oxidative damage, and antioxidative. Th e eff ect of salt stress on antioxidative enzymes and. Effect of salt stress on antioxidative enzymes and lipid. Response of the cultivated tomato and its wild salt. Boron enhances antioxidative defense in the leaves of saltaffected pistacia vera seedlings. In spite of the large number of publications on the role of antioxidative defense under salt stress, the relative importance of this process to overall plant salt tolerance is still a matter of controversy. Adequate zinc also prevents uptake and accumulation of na in shoot, by increasing membrane integrity of root. In this article, the generation and scavenging of reactive oxygen species ros under normal and salt stress conditions in relation to the type of photosynthesis is discussed. Antioxidative defense system in pigeonpea roots under.
Free oxygen and thiyl radicals several reactive oxygen species ros and one thiyl radical rs. Antioxidative defense to salt stress in trigonella foenumgraecum l. Pdf antioxidative defense against reactive oxygen species. Therefore, an imbalance between production of free radical species and systems of cellular antioxidant defense would produce the appearance of oxidative stress. Under salt stress, the relative expression levels of zmmpk5 and zmmpk7 in roots treated with 1. Summary soil salinity reduces the yield of crops at worldwide level. Regulation of some key metabolic phenomena including antioxidative defense system involved in plant salt tolerance is of great concern. The present study was carried out to study the effect of salt stress on cell membrane damage, ion content and antioxidant enzymes in wheat triticum aestivum seedlings of two cultivars salt tolerant krl19 and salt sensitive wh542. Mar 20, 2020 the purpose of current investigation was to explore the role of brassinosteroids brs in zea mays l. Pdf salt tolerance is a complex trait involving the coordinated action of many gene families that perform a variety of functions such as control of. Pdf antioxidative defence mechanisms in two contrasting. This paper investigates the effect of foliar application of sulfur on photosynthesis and antioxidative defense system of rice under the stress of cd.
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