Harvest stage effects on some yield and quality characteristics of lemon balm (Melissa officinalis L.)

Avcı, Ayşe; Giachino, R. Refika Akçali

doi:10.1016/j.indcrop.2016.01.002

Cited by 19 publications

(13 citation statements)

References 4 publications

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“…The formation of cerrusite, pyrromorphite, and susannite by Pb with CO 3 2− , PO 4 2− , and SO 4 2− , respectively was also reported in biochar soil mixture (Chi et al, 2017). The increase in the formation of FeMn plaque in rice roots by biochar and limitation in Cd mobility in soil and transport to rice roots is also reported previously (Avci & Giachino, 2016). The clay components of the biochar are also responsible for increasing the soil surface area and may able to increase the sorption of Pb and Cd.…”

Section: Discussionsupporting

confidence: 86%

Biochar amendment reduced the risk associated with metal uptake and improved metabolite content in medicinal herbs

Nigam

Khare

Ahsan

et al. 2021

Physiologia Plantarum

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Contaminations of heavy metals such as lead (Pb) and cadmium (Cd) in medicinal plants (MPs) not only restrict their safe consumption due to health hazards but also lower their productivity. Biochar amendments in the soil are supposed to immobilize the toxic metals, improve the soil quality, and agricultural productivity. However, the impact of biochar on growth attributes, metal accumulation, pharmacologically active compounds of MPs, and health risk is less explored. An experiment was performed on three medicinal plants [Bacopa monnieri (L.), Andrographis paniculata (Burmf.) Nees, and Withania somnifera (L.)] grown in a greenhouse in soil co‐contaminated with Pb and Cd (at two concentrations) without and with biochar amendments (2% and 4% application rates). The fractionation of Pb and Cd, plant growth parameters, stress enzymes, photosynthetic capacity, pharmacologically active compounds, nutrient content, uptake and translocation of metals, antioxidant activities, and metabolite content were examined in the three MPs. The accumulation of Pb and Cd varied from 3.25–228 and 1.29–20.2 mg kg−1, respectively, in the three MPs, while it was reduced to 0.08–18 and 0.03–6.05 mg kg−1upon biochar treatments. Plants grown in Pb and Cd co‐contaminated soil had reduced plant biomass (5%–50% depending on the species) compared to control and a deleterious effect on photosynthetic attributes and protein content. However, biochar amendments significantly improved plant biomass (21%–175%), as well as photosynthesis attributes, chlorophyll, and protein contents. Biochar amendments in Pb and Cd co‐contaminated soil significantly reduced the health hazard quotient (HQ) estimated for the consumption of these medicinal herbs grown on metal‐rich soil. An enhancement in secondary metabolite content and antioxidant properties was also observed upon biochar treatments. These multiple beneficial effects of biochar supplementation in Pb and Cd co‐contaminated soil suggested that a biochar amendment is a sustainable approach for the safe cultivation of MPs.

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Section: Discussionsupporting

confidence: 86%

Biochar amendment reduced the risk associated with metal uptake and improved metabolite content in medicinal herbs

Nigam

Khare

Ahsan

et al. 2021

Physiologia Plantarum

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“…Furthermore, crop management appeared to have an important influence on essential oil accumulation as the regrowth harvested at the second cut had considerably higher oil contents as compared to the first cut. During plant development the highest oil contents occur with around 0.4% in the herb during the flowering stage, while large variation may occur from one year to another [ 9 ]. In the present study the highest oil contents were recorded in some MOFF leaves ( M4 , M8 , M25 , M26 , 8955–12,669 µg/g) of the second cut.…”

Section: Resultsmentioning

confidence: 99%

Biodiversity within Melissa officinalis: Variability of Bioactive Compounds in a Cultivated Collection

2018

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Phytochemical characters were evaluated in a five-year-old lemon balm collection consisting of 15 and 13 subspecies officinalis and altissima accessions, respectively. Stems were lower in essential oil than leaves. First cut leaves (June) gave more oil than those of the second cut (August). Subspecies officinalis plants had leaf oils rich in geranial, neral and citronellal in various proportions in the first cut. However, in the second cut the oils from all accessions appeared very similar with 80–90% geranial plus neral. Leaf oils of subsp. altissima contained sesquiterpenes (β-caryophyllene, caryophyllene oxide, germacrene D) and also further monoterpenes in the second cut. Leaves had higher rosmarinic acid (RA) contents than stems. More RA was in subsp. officinalis than subsp. altissima leaves. First cut leaves were richer in RA than those from second cut. Total phenolics and antioxidant parameters showed that lemon balm is a valuable source of plant antioxidants.

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“…They suggest that the composition of oil from the same species largely depends on the mode of raw material processing, i.e., drying and distillation methods [ 81 , 86 , 89 , 90 , 91 ]. Moreover, the differences in the qualitative and quantitative composition of essential oils derived from the same taxon can also be related to other factors, i.e., seasonal variations, plant development phases and age, chemotypes, soil, light intensity, and water availability [ 88 , 92 , 93 , 94 , 95 , 96 , 97 ]. As reported by Salman et al [ 98 ], changes in the amount and composition of essential oils extracted from various taxa from the family Lamiaceae are associated with genetic and environmental factors, which also determine the genetic expression and thus influence the chemism of oil components.…”

Section: Discussionmentioning

confidence: 99%

Histochemical and Phytochemical Analysis of Lamium album subsp. album L. Corolla: Essential Oil, Triterpenes, and Iridoids

et al. 2021

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The aim of this study was to conduct a histochemical analysis to localize lipids, terpenes, essential oil, and iridoids in the trichomes of the L. album subsp. album corolla. Morphometric examinations of individual trichome types were performed. Light and scanning electron microscopy techniques were used to show the micromorphology and localization of lipophilic compounds and iridoids in secretory trichomes with the use of histochemical tests. Additionally, the content of essential oil and its components were determined using gas chromatography-mass spectrometry (GC-MS). Qualitative analyses of triterpenes carried out using high-performance thin-layer chromatography (HPTLC) coupled with densitometric detection, and the iridoid content expressed as aucubin was examined with spectrophotometric techniques. We showed the presence of iridoids and different lipophilic compounds in papillae and glandular and non-glandular trichomes. On average, the flowers of L. album subsp. album yielded 0.04 mL/kg of essential oil, which was dominated by aldehydes, sesquiterpenes, and alkanes. The extract of the L. album subsp. album corolla contained 1.5 × 10−3 ± 4.3 × 10−4 mg/mL of iridoid aucubin and three triterpenes: oleanolic acid, β-amyrin, and β-amyrin acetate. Aucubin and β-amyrin acetate were detected for the first time. We suggest the use of L. album subsp. album flowers as supplements in human nutrition.

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Harvest stage effects on some yield and quality characteristics of lemon balm (Melissa officinalis L.)

Cited by 19 publications

References 4 publications

Biochar amendment reduced the risk associated with metal uptake and improved metabolite content in medicinal herbs

Biochar amendment reduced the risk associated with metal uptake and improved metabolite content in medicinal herbs

Biodiversity within Melissa officinalis: Variability of Bioactive Compounds in a Cultivated Collection

Histochemical and Phytochemical Analysis of Lamium album subsp. album L. Corolla: Essential Oil, Triterpenes, and Iridoids

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