Effect of water deficit on yield and quality of lemon balm (Melissa officinalis L.)

Radácsi, Péter; Szabó, Krisztina; Szabó, Dóra; Trócsányi, Eszter; Németh-Zámbori, Éva

doi:10.13080/z-a.2016.103.049

Cited by 12 publications

(14 citation statements)

References 14 publications

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“…This might be an explanation to the high FRAP and TPC values of 'Grosso' and higher TPC values of the other Lavandula cultivars from Dörgicse. However, our findings do not correspond to those reported by previous authors (Trócsányi et al, 2015;Németh-Zámbori et al, 2016;Radácsi et al, 2016) concerning drought stress reactions of other xerofil species, such as Thymus vulgaris. According to their results, it was concluded that more polyphenols, such as rosmarinic acid were detected in thyme and lemon balm plants as a consequence of water deficiency, while in our experiment this phenomenon was not observed in the growth year of 2017.…”

Section: 'Grappenhall'contrasting

confidence: 99%

Antioxidant capacity and total polyphenol content of Lavandula cultivars at different growing areas in Hungary

Détár

Németh

Pluhár

2020

Int. j. hortic. sci.

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Lavandula species are worldwide grown essential oil producing medicinal plants with considerable economic value. Beside volatile oil, lavender also contains different phenolic compounds which have been less widely studied till now. Cultivation of lavender has become widespread in Hungary in the recent years, however, growers have limited knowledge on the productivity of cultivars available. In our research we were aimed to studying the antioxidant capacity and total polyphenol content of samples collected in two growing areas (Dörgicse and Szomód) from flowers of two L. angustifolia (‘Hidcote’, ‘Munstead’) and two L. × intermedia (‘Grosso’, Grappenhall’) varieties, during the full blooming period of 2017. Antioxidant capacity of the samples was determined by FRAP assay (Benzie and Strain, 1996), while total polyphenol content (TPC) was measured by a modified method of Singleton and Rossi (1965). According to our results, varieties of L. × intermedia showed higher values of antioxidant capacity and of total polyphenol content, than those of L. angustifolia cultivars. Among them, both the antioxidant capacity (179.6 mg AAE/g DW) and total polyphenol content values (152.4 mg GAE/g DW) of ’Grosso’ from Dörgicse were the highest. Concerning FRAP values of all the cultivars investigated, larger variability were found in Dörgicse, than in Szomód. Regarding the effect of growing area, each cultivar represented similar FRAP values in Dörgicse and in Szomód, except for ’Grosso’. However, in the case of TPC values, higher variability was observed between the growing areas, especially in the case of ’Grosso’. In the future our studies on lavender polyphenols will be completed with qualitative evaluation of the values obtained by HPLC analysis.

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Section: 'Grappenhall'contrasting

confidence: 99%

Antioxidant capacity and total polyphenol content of Lavandula cultivars at different growing areas in Hungary

Détár

Németh

Pluhár

2020

Int. j. hortic. sci.

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“…Malejane et al (2018) concluded, based on their trial, that overall, increasing water deficit impacted negatively on the fresh weight of both the green leafy lettuce cultivars tested. Water deficit also reduced the plant height, crown width, fresh and dry mass of Melissa officinalis L. (Radácsi et al 2016). In this study, the number of leaves and stems of S. dolomitica significantly decreased as the water deficits' intensity increased.…”

Section: Discussionsupporting

confidence: 50%

Effect of water deficits on the growth and secondary metabolites of Salvia dolomitica Codd. and Salvia namaensis Schinz

Roos

Nchu

2021

Journal of Medicinal Plants for Economic Development

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Background: Salvia dolomitica Codd. and Salvia namaensis Schinz. are indigenous to southern Africa and are used as medicinal plants in folk medicine.Aim: This study aimed to assess the effects of different levels of water deficit treatments on the growth, concentration of secondary metabolites, and anti-Fusarium oxysporum activity of S. dolomitica and S. namaensis.Setting: Experiments were carried out on the Bellville campus of the Cape Peninsula University of Technology, Cape Town.Methods: Four weeks old seedlings of the two species were subjected to 3-, 6-, 9- and 12-day water deficit regimes. Secondary metabolites such as polyphenols, alkaloids, and flavanols were assessed using spectroscopic methods. The anti-fungal activities of crude extracts obtained from plants were evaluated in a micro-dilution bioassay.Results: In all treatments, the plant height, crown width, number of stems and leaves, and fresh and dry weights reduced with increased water deficits. Acetone extracts from all treatments showed anti-fungal activity. However, extracts from the treatment with moderate water deficit (6-day watering interval) recorded significantly (P 0.01) better inhibition of F. oxysporum at the 18 h post incubation than the commercial fungicide, Mancozeb.Conclusion: This research has revealed that mild to moderate water deficit level favours the accumulation of alkaloids in S. dolomitica. Meanwhile, mild to severe water deficit significantly lowered flavanol content in S. namaensis. There was a correlation between the increase in total alkaloid contents and the enhanced anti-fungal activity of extracts of S. dolomitica. The present findings pave the way for optimised cultivation of medicinal plants and development of bioactive natural products.

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“…The changing shoot/root ratio may reflect an intensive growth of the roots for reaching water in the drier soils, and may also be the result of the reduced shoot growth under unfavourable conditions. Formerly, in a climatic chamber experiment we also found, that water shortage (40% of SWC) resulted in a 2 fold root/shoot ratio of lemon balm compared to the control (Radácsi et al, 2016b).…”

Section: Discussionmentioning

confidence: 61%

Influence of water supply and fluctuations on yield and quality of lemon balm (Melissa offici-nalis L.)

Németh¹,

Radácsi²,

Gosztola³

et al. 2017

Aust J Crop Sci

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The response of lemon balm (Melissa officinalis) on drought stress was investigated in a pot experiment in 2015-16. In treatment S1, plants grew in 40% saturation of soil water capacity (SWC) for six weeks. In treatment S2, the same level of water supply was used for three weeks, while the control plants received irrigation up to 70% SWC throughout the experimental period. In the second year, after the stress period, a 3 week re-hydration phase was also carried out. Growth, morphology, biomass, active components and antioxidant capacity of the plants were measured. Six weeks growth at reduced soil water content (40% soil water capacity) resulted in a significant decrease of all morphological features of lemon balm as well as the fresh mass of shoots, as compared to the control (70% SWC). The effect of the shorter drought treatment (3 weeks) was less characteristic. After the three week recovery period no significant difference concerning number of branches, leaf length and fresh shoot mass was detectable among the plants. Thus, the retarding effect of even the 6 week drought stress (S1) was reversible in lemon balm. The changes in active components (volatile compounds, phenolics, rosmarinic acid) and antioxidant capacity did not show meaningful changes due to the treatments. After a three-week re-hydration period a significant increase was found in each parameter. It was established that a six week period of water shortage (water content of 40% SWC) could threaten the yield of lemon balm, although re-hydration by regular irrigation may induce significant recovery. The impact of water shortage on the quality of the drug was less critical.

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Effect of water deficit on yield and quality of lemon balm (Melissa officinalis L.)

Cited by 12 publications

References 14 publications

Antioxidant capacity and total polyphenol content of Lavandula cultivars at different growing areas in Hungary

Antioxidant capacity and total polyphenol content of Lavandula cultivars at different growing areas in Hungary

Effect of water deficits on the growth and secondary metabolites of Salvia dolomitica Codd. and Salvia namaensis Schinz

Influence of water supply and fluctuations on yield and quality of lemon balm (Melissa offici-nalis L.)

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