Salt-tolerance mechanisms induced in Stevia rebaudiana Bertoni: Effects on mineral nutrition, antioxidative metabolism and steviol glycoside content

Cantabella, Daniel; Piqueras, Abel; Acosta‐Motos, José Ramón; Bernal‐Vicente, Agustina; Hernández, José Antonio; Díaz‐Vivancos, Pedro

doi:10.1016/j.plaphy.2017.04.023

Cited by 79 publications

(67 citation statements)

References 36 publications

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“…Averaged across the KNO 3 levels, the plants treated with low salinity water (NaCl at 40 mM) accumulated higher amount of stevioside, Reb-A and TSGs compared with the plants treated with high salinity (NaCl at 120 mM) water and non-saline water in both the years. The present results are in conformity with the findings of Zeng et al (2013) and Cantabella et al (2017). Low SGs accumulation at severe salinity condition may be due to the fact that the energy is utilized for the process of maintaining metabolic homeostasis.…”

Section: Discussionsupporting

confidence: 92%

Exogenous application of KNO₃ elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

Mahajan

Sharma

Kumar

2019

Preprint

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Number of tables: 05Number of figures: 07 (5, 6, 7 will be colour online-only) Number of Words (start of the introduction to the end of the acknowledgements): 6502Supplementary data: two tables (Table S1 and S2) and one figure ( Fig S1) Exogenous application of KNO 3 elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism HighlightThe detrimental effects of moderate and higher salinity levels on growth and dry leaf yield of stevia were observed. However, tolerance level can be elevated through exogenous application of KNO 3 . Abstract Though relatively little is understood of adaptation, physiological and metabolic changes ofStevia rebaudiana under exposure to salinity stress, it is hypothesized that exogenous application of potassium (K + ) could elevates the salinity tolerance through ions homeostasis.Thus, an experiment was conducted with twenty treatment combinations comprising four salinity levels (irrigation with normal water as control and three level of NaCl at 40, 80 and 120 mM) and five different concentrations of KNO 3 (0.0, 2.5, 5.0, 7.5, and 10.0 g L -1 ). Dry leaf yield was not negatively affected with mild salinity (40 mM). However, the detrimental effects were observed at moderate and higher salinity levels (80 and 120 mM). The uptakes of K + , Ca 2+ , and N were significantly reduced at higher salinity level, whereas accumulations of Na + and Cl − ions in plant tissues were substantially increased. Proline content in leaf was also increased significantly (P≤0.05) in response to salt stress. Among the foliar application, KNO 3 at 5.0 gL -1 registered significantly (P≤0.05) higher dry leaf yield compared with control. Exogenous application of K+ under moderate salinity stress maintained ion balance in cytosol, particularly K: Na. Thus, the salinity tolerance of stevia can be elevated to some extent through exogenous application of K + .

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Section: Discussionsupporting

confidence: 92%

Exogenous application of KNO₃ elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

Mahajan

Sharma

Kumar

2019

Preprint

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“…Another mechanism behind the reduction of plant growth under saline conditions might be the reduction in photosynthesis due to the plant stomatal closure and the resulting reduction of carbon uptake [21]. A significant reduction in the absorption of nutrient elements due to reduced osmotic pressure has also been reported as a secondary impact of salinity stress on reduced plant nourishment [52].…”

Section: Impacts Of Salinity On Plant Agronomic Traitsmentioning

confidence: 99%

An Overview of Hazardous Impacts of Soil Salinity in Crops, Tolerance Mechanisms, and Amelioration through Selenium Supplementation

Kamran

Parveen

Ahmar

et al. 2019

IJMS

342

200

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Soil salinization is one of the major environmental stressors hampering the growth and yield of crops all over the world. A wide spectrum of physiological and biochemical alterations of plants are induced by salinity, which causes lowered water potential in the soil solution, ionic disequilibrium, specific ion effects, and a higher accumulation of reactive oxygen species (ROS). For many years, numerous investigations have been made into salinity stresses and attempts to minimize the losses of plant productivity, including the effects of phytohormones, osmoprotectants, antioxidants, polyamines, and trace elements. One of the protectants, selenium (Se), has been found to be effective in improving growth and inducing tolerance against excessive soil salinity. However, the in-depth mechanisms of Se-induced salinity tolerance are still unclear. This review refines the knowledge involved in Se-mediated improvements of plant growth when subjected to salinity and suggests future perspectives as well as several research limitations in this field.

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“…Besides, Shahverdi et al [7] showed that low level of NaCl concentration (30 mM) caused increasing steviol glycosides and concluded that stevia is a moderate NaCl tolerant plant. According to the results of other research [17], stevioside and rebaudioside A contents did not exhibit statistically significant changes in the plants treated with 2 g/L NaCl, whereas 5 g/L NaCl decreased the contents of steviolbioside and rebaudioside A by 21% and 34%, respectively. Means followed by the same lower case letters in a column and capital letters on the lines do not differ significantly by the LSD test (p < 0.05).…”

Section: Resultsmentioning

confidence: 76%

“…These results corroborated the Pandey and Chikara [5], who observed an increase in the rebaudioside A under higher concentration of NaCl. Cantabella et al [17] reported that low salt levels did not affect steviolbioside and rebaudioside A contents. Pandey and Chikara [5] demonstrated that amount of stevioside and rebaudioside A significantly increased at 50, 75 and 100 mM NaCl but not at 25 mM NaCl.…”

Section: Resultsmentioning

confidence: 98%

Promoting effect of foliar silicon on steviol glycoside contents of Stevia rebaudiana Bertoni under salt stress

Yavaş

Yılmaz²,

Ünay³

2019

International Journal of Secondary Metabolite

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This study investigated the effect of foliar silicon application on fresh weight and dry matter contents as well as steviol glycoside contents of stevia (Stevia rebaudiana Bertoni) grown under salt stress. In this respect, an experimental research with factorial arrangement on a Completely Randomized Design with four replications was conducted in plastic pots under greenhouse conditions. Four different salinity levels (0, 25, 50, and 75 mM NaCl) were used for three weeks old seedling and two different foliar silicone concentrations (12.5 and 25 mM) were applied in the form of sodium silicate which was launched after 4 weeks of planting. Both NaCl concentrations and foliar silicone application had statistically significant effect (p≤0.05) on fresh weight and dry matter characteristics and also on rebaudioside-A and stevioside contents of stevia leaves which were harvested before flowering period. Results showed that salt stress decreased both rebaudioside-A and stevioside contents, but foliar silicone application improve negative influences of NaCl treatments with even increasing the steviol glycoside contents. Rebaudioside-A content did not change, but stevioside content decreased with foliar silicone application in control conditions. However, highest rebaudioside-A and stevioside accumulation were recorded in 25 mM foliar silicone application under 50 mM NaCl stress. In these conditions, rebaudioside-A and stevioside contents were 112 and 26% higher than control, respectively. It could be concluded that the application of silicon significantly enhanced the plants ability to withstand salt stress conditions through increased silicon content, increased steviol glycoside production. Silicon application could therefore improve crop production under salt stress.

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Salt-tolerance mechanisms induced in Stevia rebaudiana Bertoni: Effects on mineral nutrition, antioxidative metabolism and steviol glycoside content

Cited by 79 publications

References 36 publications

Exogenous application of KNO₃ elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

Exogenous application of KNO₃ elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

An Overview of Hazardous Impacts of Soil Salinity in Crops, Tolerance Mechanisms, and Amelioration through Selenium Supplementation

Promoting effect of foliar silicon on steviol glycoside contents of Stevia rebaudiana Bertoni under salt stress

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Salt-tolerance mechanisms induced in Stevia rebaudiana Bertoni: Effects on mineral nutrition, antioxidative metabolism and steviol glycoside content

Cited by 79 publications

References 36 publications

Exogenous application of KNO3 elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

Exogenous application of KNO3 elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

An Overview of Hazardous Impacts of Soil Salinity in Crops, Tolerance Mechanisms, and Amelioration through Selenium Supplementation

Promoting effect of foliar silicon on steviol glycoside contents of Stevia rebaudiana Bertoni under salt stress

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Exogenous application of KNO₃ elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism

Exogenous application of KNO₃ elevates the salinity tolerance of Stevia rebaudiana through ion homeostasis mechanism