The Physiological and Biochemical Responses of a Medicinal Plant (Salvia miltiorrhiza L.) to Stress Caused by Various Concentrations of NaCl

Gengmao, Zhao; Shi, Qiong; Yu, Han; Shihui, Li; Wang, Changhai

doi:10.1371/journal.pone.0089624

Cited by 49 publications

(29 citation statements)

References 38 publications

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“…3). The increase in sugar concentrations in leaves is in line with the results reported for other species of the Lamiaceae such as Melissa officinalis ( Khalid and Cai , 2011), Ocimum basilicum ( Heidari , 2012), and Salvia miltiorrhiza ( Gengmao et al, 2014), in which the sugar concentration increased under salt stress. Soluble sugar fluctuations under salt stress can be due to changes in CO 2 assimilation, in source‐sink carbon partitioning and in activity of related enzymes ( Rosa et al, 2009).…”

Section: Discussionsupporting

confidence: 88%

Lavandula multifida response to salinity: Growth, nutrient uptake, and physiological changes

García‐Caparrós

Llanderal

Pestana

et al. 2016

J. Plant Nutr. Soil Sci.

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Fern leaf lavender (Lavandula multifida L.) is a perennial shrub native to Almería with known medicinal properties, which grows in saline soils that are increasingly present in the Mediterranean region. However, the effects of salinity on the mineral nutrition and physiology of L. multifida are unknown. In the present study, we evaluated the salt resistance of this species and compared it with other members of the Lamiaceae. Plants of L. multifida were grown in pots in a mixture of sphagnum peat‐moss and Perlite, and treated with five different NaCl concentrations [10 (control), 30, 60, 100, and 200 mM NaCl] over a period of 60 d. The effects of different levels of salinity on mineral nutrient and osmolyte concentrations and on biomass were evaluated. Our results show that L. multifida plants were able to grow with 60 mM NaCl without significant biomass reduction. Na+ and Cl− were the main contributors to the osmotic potential in both roots and leaves, whereas total soluble sugars (TSS) and proline made only a small contribution. The concentrations of TSS and proline showed different trends in the different organs: in roots, both showed the highest concentrations at 60 mM NaCl, whereas in leaves TSS increased and proline decreased with increasing salt stress. To survive salinity, L. multifida plants increased salt excretion (Na+ and Cl−) by leaves at 100 and 200 mM NaCl and leaf succulence at 60, 100, and 200 mM NaCl. Excessive accumulation of Na+ and Cl− was avoided by shedding leaves. Our results indicate that L. multifida is better adapted to salinity compared to other members of the Lamiaceae¸ a consideration that is particularly relevant for their growth in arid saline areas.

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Section: Discussionsupporting

confidence: 88%

Lavandula multifida response to salinity: Growth, nutrient uptake, and physiological changes

García‐Caparrós

Llanderal

Pestana

et al. 2016

J. Plant Nutr. Soil Sci.

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“…Application of salicylic acid ameliorated the effect of salinity, reduced the activity of APX and increased the activity of CAT in T. aestivum plants. This increase in CAT activity in response to salt stress in the present study was consistent with the results reported by Gengmao et al, [51]. It has been suggested that, the treated plants with SA concentration possess a better scavenging ability.…”

Section: Antioxidant Enzyme Activitysupporting

confidence: 93%

Salicylic Acid Treatment Increases Salt Tolerance of Wheat Plants by Enhancing Antioxidant Defense Systems

Mohamed

2014

Al-Azhar Bulletin of Science

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The present study was conducted to assess influence of salinity and varying concentrations of salicylic acid (0.5 mM and 1mM SA) on growth, antioxidant enzyme activities and biochemical activities of wheat plants. Wheat (cv. Sods 12) was grown in a normal clay soil for 30 days. The treatments comprised of control, 50 mM NaCl, 100 mM NaCl, and 150 mM NaCl. Except control, the concentrations of NaCl at all levels were applied through irrigation. After harvest, the plant samples were analyzed for photosynthetic pigments, proline content, electrical conductivity, and cell membrane stability. The results show significant decline in vegetative parameters (e.g., dry mass) at higher application rates of salinity and SA (1 mM SA + NaCl) as compared to control treatment. The phenolic compounds and ascorbic acid concentrations were reduced after application of 0.5 mM SA and combined application of NaCl and SA, while the concentration of Milondialdehyde (MDA) was gradually increased by increasing SA application and were maximum at the highest application level of combined NaCl and 1 mM SA. The level of antioxidant defense systems (catalase and ascorbate peroxidase) increased in response to salicylic acid treatment. Enhanced antioxidant activities helped to decrease oxidative damage from salt and develop tolerance against salt stress in salicylic acid-treated wheat plants. The data provided evidence that salicylic acid treatment reduced the adverse effects of salt stress on wheat plants, and might play a key role in providing stress tolerance by stimulation of the antioxidant system as a stress protection mechanism.

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“…SA induced enhancement in the activity of CAT and APX in wheat plants contributed to quick neutralization of H2O2 and hence protecting the membranes from the toxic effects of stress. SA mediated increase in CAT activity under salt stress has also been reported by Gengmao et al, (2014). Interactive effect of salicylic acid and different levels of NaCl on activity of (A) SOD (B) CAT and (C) APX in wheat plants.…”

Section: Sa Application Improves the Synthesis Of Proline Free Aminomentioning

confidence: 52%

Salicylic acid alleviates salinity stress through the modulation of biochemical attributes and some key antioxidants in wheat seedlings

Alsahli¹,

Mohamed²,

Alaraidh³

et al. 2019

PAK.J.BOT.

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A study was conducted to evaluate the role of salicylic acid (SA; 0, 0.5 and 0.75 mM) on the growth and activity of antioxidant enzymes and biochemical attributes in wheat (Triticum aestivum L.cv. Sods 1) under salinity stress. Salinity exposure (0, 25, 75 and 125 mM NaCl) reduced growth of wheat significantly by reducing the fresh and dry weight of shoot and root, leaf development and inducing necrosis on old leaves. Lipid peroxidation and production of hydrogen peroxide (H2O2) increased by 3.37 fold and 2.54 fold, respectively, while membrane stability declined with 125 mM NaCl concentration which were however, ameliorated by the application of SA. Under normal conditions, application of SA (0.5 mM) improved growth significantly compared to the untreated controls. Salinity (125 mM) stress enhanced the accumulation of proline (4.63 fold), carbohydrates (39.61%), free amino acids (9.44) and protein content (7.91%) which were further stimulated by application of SA leading to better stress adaptation. Application of SA to salinity stressed upregulated the activity of antioxidant enzymes like SOD, CAT and APX by 1.76 fold, 2.25 fold and 2.22 fold, respectively leading to better elimination of reactive oxygen species and protection against oxidative stress. Moreover, excess uptake of Na in salinity stressed plants reduced the uptake of K + and initiated leaf necrosis. However, application of SA mitigated these negative effects to considerable extent. In conclusion, salinity stress adversely affected the growth and development of wheat plants. However, supplementation of proper dosage of SA mitigated these negative effects of salinity through the modulation of the levels of osmolytes, activities of antioxidant enzymes and uptake of essential elements.

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The Physiological and Biochemical Responses of a Medicinal Plant (Salvia miltiorrhiza L.) to Stress Caused by Various Concentrations of NaCl

Cited by 49 publications

References 38 publications

Lavandula multifida response to salinity: Growth, nutrient uptake, and physiological changes

Lavandula multifida response to salinity: Growth, nutrient uptake, and physiological changes

Salicylic Acid Treatment Increases Salt Tolerance of Wheat Plants by Enhancing Antioxidant Defense Systems

Salicylic acid alleviates salinity stress through the modulation of biochemical attributes and some key antioxidants in wheat seedlings

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