The combined effects of gibberellic acid and salinity on some antioxidant enzyme activities, plant growth parameters and nutritional status in maize plants

Tuna, Atilla Levent; Kaya, Cengiz; Dikilitaş, Murat; Higgs, David

doi:10.1016/j.envexpbot.2007.06.007

Cited by 336 publications

(214 citation statements)

References 67 publications

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“…El Sayed (2011) observed severe reductions in plant height, root extension, root and shoot biomass, harvest index, leaf area, photosynthesis, mitotic division, and productivity (both grain and straw yield per pot) in salinity-stressed maize in a sandy soil, while insertion of the hydrogel polymer in sand rectified the damaging effects of salinity and substantially improved all of the above-mentioned traits. Tuna et al (2008) evaluated the combined effects of salt stress and gibberellins on plant growth and the nutritional status of maize. Salt stress reduced total dry matter, chlorophyll content, and relative water content but increased proline accumulation, superoxide dismutase, peroxidase and polyphenol oxidase activities, and electrolyte leakage.…”

Section: Bacillus Megateriummentioning

confidence: 99%

Salt stress in maize: effects, resistance mechanisms, and management. A review

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

587

383

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Maize is grown under a wide spectrum of soil and climatic conditions. Maize is moderately sensitive to salt stress; therefore, soil salinity is a serious threat to its production worldwide. Understanding maize response to salt stress and resistance mechanisms and overviewing management options may help to devise strategies for improved maize performance in saline environments. Here, we reviewed the effects, resistance mechanisms, and management of salt stress in maize. Our main conclusions are as follows: (1) germination and stand establishment are more sensitive to salt stress than later developmental stages. (2) High rhizosphere sodium and chloride decrease plant uptake of nitrogen, potassium, calcium, magnesium, and iron. (3) Reduced grain weight and number are responsible for low grain yield in maize under salt stress. Sink limitations and reduced acid invertase activity in developing grains is responsible for poor kernel setting under salt stress. (4) Exclusion of excessive sodium or its compartmentation into vacuoles is an important adaptive strategy for maize under salt stress. (5) Apoplastic acidification, required for cell wall extensibility, is an important indicator of salt resistance, but not essential for better maize growth under salt stress. (6) Upregulation of antioxidant defense genes and β-expansin proteins is important for salt resistance in maize. (7) Arbuscular mycorrhizal fungi improve salt resistance in maize due to better plant nutrient availability. (8) Seed priming is an effective approach for improving maize germination under salt stress. (9) Integration of screening, breeding and ion homeostasis mechanisms into a functional paradigm for the whole plant may help to enhance salt resistance in maize.

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Section: Bacillus Megateriummentioning

confidence: 99%

Salt stress in maize: effects, resistance mechanisms, and management. A review

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

587

383

View full text Add to dashboard Cite

show abstract

“…cotton [22], linseed [23], bean [24], maize [25] tetraploid wheat [26], pea [27], alfalfa [28] and sorghum [29]. Munns and Tester [19] reported that the salinity reduces the ability of plants to uptake water which subsequently leads to a reduction in growth rate along with a chain of metabolic changes.…”

Section: Resultsmentioning

confidence: 99%

“…The GPX activity decreased with increase of NaCl application. SOD is one of the most important antioxidant enzymes and is the first line of cellular defense against the oxidative stress [25,32]. SOD plays an important role in modulating the relative amount of O2• -and H 2 O 2 in plants and hence, performs a key role in the defense mechanism against ROS toxicity [22].…”

mentioning

confidence: 99%

Physiological and biochemical characterization of Sesamum germplasms tolerant to NaCl

2016

J App Biol Biotech

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Sesamum indicum L. (family-Pedaliaceae) is an economically important oil seed crop grown in tropical and subtropical countries. It is widely used in food, nutraceutical, pharmaceutical industries. Salinity is considered as the most important abiotic stress limiting to crop production. In this context, the present study was to evaluate the Sesamum genotypes for salinity tolerance. Germinated seedlings (15-d-old) were used to screen the germplsm at different concentrations (0, 25mM, 50mM, 75mM, 100mM) of NaCl and observation was taken after 15 th , 30 th and 45 th days of treatment. Ion content (Na + , Cl -, Ca ++ , Mg ++ and K ++ ) were measured after 15 days of treatment. Fresh and dry weight was less in salt sensitive genotypes than tolerant genotypes. During increase of salinity concentration, all the genotypes had a negative impact on roots. The seedlings showed reduced growth and displayed variation in ion uptake thus accumulating Na + and Cl -in the roots. At higher concentration of salt treatment showed the more dry weight and displayed more effective ion regulation by manipulating low Na + /K + and Na + /Ca ++ ratio. The tolerant genotypes exhibited the lowest shoot Na + content under salinity conditions. Higher proline accumulation was observed at 100 mM after 15 days of NaCl treatments in 'KM-13' genotype. After 15 days of treatment, the genotype 'ES 2138-2' showed maximum proline accumulation. The total carbohydrates contents increased in all the ten genotypes in presence of NaCl. Highest carbohydrate content was found in genotype 'SI-1926' grown in 100 mM NaCl. Enzyme activities are variable in different genotypes with different concentration of NaCl. This study will help in Sesamum improvement programme.

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“…The activities of Polyphenol Oxidase (POD) in salt-stressed plants decreased by exogenous application of GA 3 , but the values were still higher than those in the control in maize plants (Tuna et al 2008 …”

Section: Discussionmentioning

confidence: 96%

Plant growth regulator interactions results enhancement of antioxidant enzymes inCatharanthus roseus

Jaleel

Salem

Hasanuzzaman³

2010

Journal of Plant Interactions

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The present investigation was carried out with the objectives to understand the effect of paclobutrazol, gibberellic acid and Pseudomonas fluorescens on the enzymatic antioxidants like Ascorbate peroxidase (APX, EC: 1.11.1.11), Superoxide dismutase (SOD, EC: 1.15.1.1), Catalase (CAT, EC: 1.11.1.6), Peroxidase (POX, EC 1.11.1.7) and polyphenol oxidase (PPO, Ec 1.10.3.1) activities of Catharanthus roseus plants under field conditions. 10 mg l(1 paclobutrazol, 5 mM gibberellic acid and 1 mg P. fluorescens concentrations were used for the treatments, and control plants were irrigated with well water. The treatments were given 38, 53, 68 and 83 days after planting (DAP) by soil drenching. The plants were taken randomly 45, 60, 75 and 90 DAP and separated into root, stem, leaves and flowers and used for estimating the antioxidant enzymes. The results showed that these plant growth regulators have significant effects on antioxidant enzymes of C. roseus.

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The combined effects of gibberellic acid and salinity on some antioxidant enzyme activities, plant growth parameters and nutritional status in maize plants

Cited by 336 publications

References 67 publications

Salt stress in maize: effects, resistance mechanisms, and management. A review

Salt stress in maize: effects, resistance mechanisms, and management. A review

Physiological and biochemical characterization of Sesamum germplasms tolerant to NaCl

Plant growth regulator interactions results enhancement of antioxidant enzymes inCatharanthus roseus

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