Effect of two plant growth retardants on steviol glycosides content and antioxidant capacity in Stevia (Stevia rebaudiana Bertoni)

Karimi, Mojtaba; Ahmadi, Ameneh; Hashemi, Javad; Abbasi, Alireza

doi:10.1007/s11738-014-1498-8

Cited by 30 publications

(10 citation statements)

References 30 publications

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“…Attribute measurement -Plants were harvested at the stage of pod setting, 67 days after planting. Plant height, branches number, leaves number, fresh and dried (24 h in 60 °C) biomass and harvest indices (economical yield to biological yield multiplied by 100) (Karimi et al 2014) were determined.…”

Section: Experimental Design and Conditions -The Experiments Was Condumentioning

confidence: 99%

Foliar fertilization with micronutrients improves Stevia rebaudiana tolerance to salinity stress by improving root characteristics

2020

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Stevia (Stevia rebaudiana Bertoni), a perennial crop of the family Asteraceae, is one of the most important sources of non-caloric natural sweeteners, but research on the impact of salinity on root parameters and steviol glycoside content is limited or does not exist. The objective of this study was to assess the effect of exogenous application of iron (Fe), boron (B), and selenium (Se) on root characteristics, growth, and yield of stevia under four levels of NaCl salinity (i.e., 0, 30, 60, and 90 mM). Root length (RL), root volume (RV), root area (RA), and root fresh and dry weight (RFW and RDW) were significantly decreased with increasing salinity. The highest values of all the above root traits were observed with foliar spraying B plus Se plus Fe. Foliar spraying B plus Se plus Fe resulted in 2.9 times greater RV and 2.8 times greater RFW than control. Furthermore, salinity significantly decreased plant height, branches number, leaves number, and biomass yield of stevia. However, foliar application of micronutrients, especially B and Se, reduced those adverse effects. Moreover, salinity decreased the relative water content (RWC) and increased relative water loss (RWL) in stevia tissues. The highest RWC and the lowest RWL were observed in foliar application of B plus Se. Foliar spraying of nutrients significantly improved root characteristics and water status of salt-stressed stevia plants, which in turn (i) helped plants to tolerate excessive Na levels and (ii) improved nutrient uptake under salinity stress. In light of the above, foliar treatment of stevia plants with micronutrients for improving growth under saline conditions could be considered, but toward that direction, studies under field conditions would be required to quantify the efficiency of these micronutrients in foliar applications.

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Section: Experimental Design and Conditions -The Experiments Was Condumentioning

confidence: 99%

Foliar fertilization with micronutrients improves Stevia rebaudiana tolerance to salinity stress by improving root characteristics

2020

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“…Karimi et al reported that chlorocholine chloride (CCC) reduced plant height and SG production in stevia. Conversely, paclobutrazol (PBZ) at 12 ppm concentration improved stevia growth, SG production and antioxidant capacity.…”

Section: Agrotechniquesmentioning

confidence: 99%

Comprehensive review on agro technologies of low‐calorie natural sweetener stevia (Stevia rebaudianaBertoni): a boon to diabetic patients

et al. 2015

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Stevia rebaudiana Bertoni is a low-calorie natural sweetener plant native to Paraguay. The leaves of stevia have sweetening compounds called steviol glycosides (SGs), which contain different marker compounds, i.e. stevioside (St), rebaudioside (Rb) A, B, C, D and E, dulcoside A and steviol biosides, which are nearly 300 times sweeter than sugar. Stevia is a better alternative to sugar in formulating food products, reducing the harmful effect of sugar and improving the nutrient properties. We have tried to compile a literature on various agronomic and management aspects which are helpful in increasing the yield and quality of stevia to be grown as a crop that will benefit farmers and industrialists. The stevioside thus obtained can be used to make different food products for sweetening purposes, which could be a boon to diabetic patients. Incorporation of different agronomic techniques like propagation method, transplanting time, intercropping, irrigation, mulching, plant geometry, pinching and harvesting time not only improve the biomass but also increase the quality of stevia. Therefore, agronomic considerations are of high priority to utilize its maximum potential. © 2015 Society of Chemical Industry.

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“…Since, in stevia, SVglys and gibberellins have a common precursor in their biosynthesis pathway, it is important to study the role of gibberellin inhibitors in order to better understand their effects on stevia growth responses, SVglys and antioxidant systems induction. Recently, Karimi et al [236] evaluated, through two greenhouse experiments, the effect of two plant growth retardants, chlorocholine chloride (CCC) and paclobutrazol (PBZ), on growth, SVglys content, and antioxidant capacity. They found that CCC reduced plant height, but improved leaf and stem dry weight, especially with 750 ppm concentration.…”

Section: Case Study 4: Growth Regulatorsmentioning

confidence: 99%

“…Total antioxidant capacity significantly varied with CCC and PBZ, and the highest activity was obtained with 1,000 and 12 ppm of CCC and PBZ, respectively. Karimi et al [236] concluded that, although CCC and PBZ are plant growth retardants and act as antigibberellins, only CCC reduced plant height and SVglys production in stevia. On the contrary, PBZ at 12 ppm concentration improved stevia growth, SVglys production, and antioxidant capacity.…”

Section: Case Study 4: Growth Regulatorsmentioning

confidence: 99%

Cultivation of Stevia rebaudiana Bertoni and Associated Challenges

Martini

Passera

Tavarini

2016

Reference Series in Phytochemistry

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The rising concern about the spread of obesity and diabetes, and a growing awareness about healthy foods in western societies have stimulated, in the last years, a strong interest toward stevia sweeteners as alternative of sucrose and artificial intensive sweeteners. The worldwide demand for purified steviol glycosides from stevia is steadily increasing, and it is expected that in the future the agricultural production capacity will be lower than the market demand. This provides a strong incentive to explore the possibilities to cultivate stevia and to produce leaves and extracts, beyond the traditional production zones. The cultivation of stevia might represent a formidable opportunity for the growers, in order to diversify the cropping systems and to meet the increasing market demand for high-quality and traceable raw material. In addition, several legislative initiatives, such as the steviol glycosides approval as food additive in several countries, represent favorable factors for the development of a stevia-based agro-industry. To foster the introduction of this novel species, a significant improvement of its cultivation should be achieved and a modern agronomical blueprint defined. It is, in fact, imperative to develop economically viable and environmentally sustainable crop production systems through the integration of site-specific agronomic techniques and efficient mechanization technologies for the production and processing of a higher quality product. Several agronomic aspects require still to be optimized (e.g., choice of the cultivar, propagation and transplanting, sustainable weed management, nutrition, irrigation, harvesting), in order to improve, not only the leaf yield, but also its quality in terms of steviol glycosides and bioactive compounds. Traceability and crop quality control along the production chain are the strongest points, in order to obtain a certification that will provide to the farmers preferential market access and to sell the raw material at a differential price. The present chapter, therefore, aims to provide updated scientific information regarding the most important agronomic factors in order to foster stevia cultivation and attain maximum yield and quality.

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Effect of two plant growth retardants on steviol glycosides content and antioxidant capacity in Stevia (Stevia rebaudiana Bertoni)

Cited by 30 publications

References 30 publications

Foliar fertilization with micronutrients improves Stevia rebaudiana tolerance to salinity stress by improving root characteristics

Foliar fertilization with micronutrients improves Stevia rebaudiana tolerance to salinity stress by improving root characteristics

Comprehensive review on agro technologies of low‐calorie natural sweetener stevia (Stevia rebaudianaBertoni): a boon to diabetic patients

Cultivation of Stevia rebaudiana Bertoni and Associated Challenges

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