Silicon-induced alleviation of NaCl toxicity in okra (Abelmoschus esculentus) is associated with enhanced photosynthesis, osmoprotectants and antioxidant metabolism

Abbas, Tasawer; Balal, Rashad Mukhtar; Shahid, Muhammad Adnan; Pervez, Muhammad Aslam; Ayyub, C. M.; Aqueel, Muhammad Anjum; Javaid, Muhammad Mansoor

doi:10.1007/s11738-014-1768-5

Cited by 171 publications

(106 citation statements)

References 45 publications

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“…It was hypothesized that the silicon decreases of uptake Na + by plants under salt stress and the increase of K + /Na + ratio also prevented Na + translocation in leaves and/or specific deposition in roots (Guntzer et al, 2011 andAbbas et al, 2015).Similar observation was reported by Ibrahim et al (2016) in wheat.…”

Section: Germination and Plant Growthsupporting

confidence: 69%

“…Abbas et al (2015) reported that foliar application of silicon increased proline, glycinebetaine, and total free amino acids in both shoots and roots of salt-stressed okra plant. Reduction in proline contents with silicon application under stress has been observed in many plant species such as soybean (Lee et al, 2010), maize (Moussa, 2006).…”

Section: Total Soluble Proteins Carbohydrates Amino Acids and Prolimentioning

confidence: 99%

“…More or fewer data were reported by Abbas et al (2015) that foliar application of silicon (150 mgL −1 ), decreased lipid peroxidation and increased antioxidant enzymes activities in both leaves and root of okra under salt stress.Similar studies showed that siliconmediated enhancement in antioxidant enzyme activities and decreased in oxidative stress in saltstressed tomato plants grown in sand culture (Li et al, 2015). Figure 3 and Fig.4 indicated that salinity stress caused highly significant increases in all the assessed organic compounds (total soluble sugars proteins, amino acids and proline content).…”

Section: Antioxidant Defense Systemmentioning

confidence: 99%

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Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

et al. 2017

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T HE PRESENT study was carried out to investigate the effect of high NaCl concentrations on some growth parameters and physiological processes of wheat (Triticum aestivum L.) plant. The results indicated that Gemeza.9 was the most sensitive cultivar to high salinity levels compared to all tested wheat cultivars. Moreover, salinity stress caused a reduction in the germination percentage by 65% and all growth parameters by 21%, 25% and 60% in the lengths of shoot, root and leaf area, also by 27% and 48% in fresh weights of shoot, root and 40% and 75% in dry weights of shoot and root. It also increased the activity of antioxidant enzymes (peroxidase and catalase), lipid peroxidation and ascorbic acid content. Salinity induced increase of osmolytes compounds such as total soluble proteins, carbohydrates and amino acids. Furthermore, all measured yield parameters, the percentage of grain's maturity and productivity were highly decreased. Accordingly, the role of potassium humate and potassium silicate either sole or combined in alleviating the toxic effect of salinity was also studied. Results showed that application of potassium humate as sole had a stimulatory effect higher than potassium silicate or their combination. It increased the germinating percentage by 128% at 200mM NaCl. In addition, potassium humate and potassium silicate increased the photosynthetic activity, decreased the activity antioxidant enzymes (Peroxidase and Catalase) as well as biosynthesis of MDA and ascorbic acid also they induced increase biosynthesis of proteins and carbohydrates in yielded grains. Accordingly, our study recommends the application of potassium humate as an organic fertilizer and potassium silicate as a foliar spray for improving the quality and quantity of the sensitive wheat cultivar Gemeza.9 cultivated in salty lands and increases its productivity.

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Section: Germination and Plant Growthsupporting

confidence: 69%

Section: Total Soluble Proteins Carbohydrates Amino Acids and Prolimentioning

confidence: 99%

Section: Antioxidant Defense Systemmentioning

confidence: 99%

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Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

et al. 2017

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“…Salt stress commonly inhibits photosynthesis and plant growth, and less inhibition is usually observed in salt-tolerant plant verities (Abbas et al 2015;Almodares et al 2014;Chao et al 2013;Kiani-Pouya 2015;Yan et al 2015). In this study, biomass and photosynthetic activity were less affected by salt stress in pretreated plants compared with non-pretreated plants (Figs.…”

Section: Discussionsupporting

confidence: 46%

Salt priming improved salt tolerance in sweet sorghum by enhancing osmotic resistance and reducing root Na+ uptake

Cao³

et al. 2015

Acta Physiol Plant

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This study attempted to explore how salt priming affected salt tolerance in sweet sorghum with emphasis on root Na ? uptake. After 10 days of pretreatment with 150 mM NaCl, plants were stressed with 300 mM NaCl. After salt stress for 7 days, dry matter of root and shoot decreased by 58.7 and 69.7 % in non-pretreated plants and by 37.9 and 41.3 % in pretreated plants. Consistently, pretreated plants maintained higher photosynthetic rate during salt stress, suggesting the enhanced tolerance by salt priming. Salt priming enhanced osmotic resistance, as proline and relative water contents in the leaf were higher in pretreated plants under salt stress. Salt priming alleviated salt-induced oxidative damage not by improving antioxidant protection due to lower increase in leaf malondialdehyde content and no extra induction on ascorbate peroxidase, catalase, superoxide dismutase, ascorbic acid and reduced glutathione in pretreated plants. After 7 days of salt stress, root Na ? efflux increased by 8.5-and 3.9-folds in pretreated and non-pretreated plants, suggesting that salt priming reduced root Na ? uptake, and then root and leaf Na ? accumulation were mitigated in pretreated plants. However, root Na ? extrusion became indifferent between pretreated and non-pretreated plants under salt stress after inhibiting plasma membrane (PM) Na ?

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“…Silicon (Si) is an agronomically beneficial element as it improves growth, confers rigidity, strength and enhances plant tolerance to various abiotic stresses (Meena et al 2014;Abbas et al 2015). It is the most abundant element in the earth's crust after oxygen and its content in plants often reaches values of macronutrients (Kang et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Silicon nutrition and mycorrhizal inoculations improve growth, nutrient status, K+/Na+ ratio and yield of Cicer arietinum L. genotypes under salinity stress

2015

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Salinity is a major abiotic stress that limits plant growth and productivity. Role of silicon (Si) nutrition and arbuscular mycorrhiza (AM) in mitigating salt stress has gained importance in recent years. Legumes are sensitive to salinity and are considered low Si-accumulators. AM have been reported to increase Si uptake in mycorrhizal plants. However, little is known about the alleviative role of Si and/ or AM in mitigating salt stress in Cicer arietinum L. (chickpea). Therefore, the present study was aimed to evaluate the individual and cumulative effect of Si and AM (Funneliformis mosseae) on nutrient status, growth and productivity of salt tolerant HC 3 and salt sensitive CSG 9505 genotypes of chickpea under salinity stress conditions. The genotypes were subjected to 0, 60, 80,100 mM NaCl and 0, 4 mM potassium silicate-K 2 SiO 3 treatments in the presence and absence of AM fungi. The results indicated that the Si and AM treatments improve the endogenous nutrients profile, growth characteristics and yield attributes under salinity stress. AM was found to be more efficient in improving growth and productivity while Si was more beneficial in improving K ? /Na ? ratio. Mycorrhization mediated significant improvement in Si uptake and as a result, Si supplementation along with mycorrhization reduced Na ? content significantly, improved growth, yield and nutrient uptake, arrested chlorophyll pigment damage and increased RUBISCO activity. HC 3 was more responsive to mycorrhization and Si nutrition than CSG 9505. The study will contribute to our understanding of Si and/or AM mediated salinity tolerance mechanism for developing chickpea genotypes resistance to salt stress.

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Silicon-induced alleviation of NaCl toxicity in okra (Abelmoschus esculentus) is associated with enhanced photosynthesis, osmoprotectants and antioxidant metabolism

Cited by 171 publications

References 45 publications

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

Response of Salt-Stressed Wheat ( Triticum aestivum L.) to Potassium Humate Treatment and Potassium Silicate Foliar Application

Salt priming improved salt tolerance in sweet sorghum by enhancing osmotic resistance and reducing root Na+ uptake

Silicon nutrition and mycorrhizal inoculations improve growth, nutrient status, K+/Na+ ratio and yield of Cicer arietinum L. genotypes under salinity stress

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