Effects of daylength on the monoterpene composition of leaves of Mentha x piperita

Voirin, Bernard; Brun, N.; Bayet, Christine

doi:10.1016/0031-9422(90)80012-6

Cited by 101 publications

(43 citation statements)

References 6 publications

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“…A formação de lactonas sesquiterpênicas nos tricomas do girassol (Helianthus annuus) também é influenciada pela luz, sendo que uma exposição intensa leva a um maior nível biossintético 9 . As folhas de hortelã (Mentha piperita) mantidas sob condições de dia longo contêm mentol (Figura 6d), mentona (Figura 6e), e somente traços de mentofurano (Figura 6f), enquanto as plantas desenvolvidas sob condições de dia curto apresentam o mentofurano como constituinte majoritário do óleo essencial 127 .…”

Section: Radiação Ultravioletaunclassified

Plantas medicinais: fatores de influência no conteúdo de metabólitos secundários

Gobbo‐Neto¹,

Lopes²

2007

Quím. Nova

921

364

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. do Café, s/n, 14040-903 Ribeirão Preto -SP, BrasilRecebido em 7/7/05; aceito em 11/4/06; publicado na web em 31/10/06 MEDICINAL PLANTS: FACTORS OF INFLUENCE ON THE CONTENT OF SECONDARY METABOLITES. Since secondary metabolites represent a chemical interface between plants and surrounding environment, their syntheses are frequently affected by environmental conditions. Thus, variations in the total content and/or of the relative proportions of secondary metabolites in plants can take place. We review the main environmental factors that can streamline or alter the production or concentration of secondary metabolites in plants. How seasonality, circadian rhythm, developmental stage and age, temperature, water availability, UV radiation, soil nutrients, altitude, atmospheric composition and tissue damage influence secondary metabolism are discussed.Keywords: variations in secondary metabolites; medicinal plants; chemical ecology. INTRODUÇÃODesde o quarto século a.C. existem relatos de normas para a coleta de plantas medicinais. Os carrascos gregos, por ex., coletavam suas amostras do veneno cicuta (Conium maculatum) pela manhã, quando os níveis de coniina são maiores 1,2 . Variações temporais e espaciais no conteúdo total, bem como as proporções relativas de metabólitos secundários em plantas ocorrem em diferentes níveis (sazonais e diárias; intraplanta, inter-e intraespecífica) e, apesar da existência de um controle genético, a expressão pode sofrer modificações resultantes da interação de processos bioquímicos, fisiológicos, ecológicos e evolutivos 3-7 . De fato, os metabólitos secundários representam uma interface química entre as plantas e o ambiente circundante, portanto, sua síntese é freqüentemente afetada por condições ambientais 8 .Os principais fatores que podem coordenar ou alterar a taxa de produção de metabólitos secundários estão expostos a seguir. Deve ser enfatizado, porém, que os estudos sobre influência destes fatores na produção de metabólitos secundários geralmente têm se limitado a um grupo restrito de espécies, predominantemente ocorrentes em regiões temperadas, muitas das quais são comercialmente importantes e podem ter sofrido fortes pressões seletivas antrópicas visando certas características desejadas. Seu comportamento, portanto, nem sempre é representativo de plantas selvagens ou de outros tipos de habitat.Também deve ser ressaltado que, muitas vezes, as variações podem ser decorrentes do desenvolvimento foliar e/ou surgimento de novos órgãos concomitante a uma constância no conteúdo total de metabólitos secundários. Isto pode levar à menor concentração destes metabólitos por diluição, podendo, no entanto, resultar em maior quantidade total, devido ao aumento de biomassa 9,10 . Além disso, alguns dos fatores discutidos apresentam correlações entre si e não atuam isoladamente, podendo influir em conjunto no metabolismo secundário, como por ex.: desenvolvimento e sazonalidade; índice pluviométrico e sazonalidade; temperatura e altitude, entre outros. FATORES QUE INFLUENCIAM O CONTEÚDO DE M...

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Section: Radiação Ultravioletaunclassified

Plantas medicinais: fatores de influência no conteúdo de metabólitos secundários

Gobbo‐Neto¹,

Lopes²

2007

Quím. Nova

921

364

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“…The stability of enriched chemotypes becomes a significant factor in delivering a high quality product with increased nutraceutical value. Environmental factors such as photoperiod [5], water availability [6,7], temperature [6], pest and disease incidence [8][9][10] are key to mint production due to the perennial nature of the crop. These factors have a direct impact on biochemical pathways, thus affecting the metabolism of secondary products.…”

Section: Introductionmentioning

confidence: 99%

Environmental Factors Affecting the Accumulation of Rosmarinic Acid in Spearmint (Mentha spicata L.) and Peppermint (Mentha piperita L.)

Fletcher¹,

Slimmon²,

Kott³

2010

TOASJ

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Four spearmint, and two peppermint clonal lines, selected for enhanced rosmarinic acid content (50-120 mg g -1 rosmarinic acid DW), where up to 80% of the antioxidant activity was correlated to rosmarinic acid content, were examined to determine the effects of environmental and physiological conditions on the accumulation of rosmarinic acid in leaf tissues. Exposure to a short photoperiod of 12 hours in comparison to 16 hours reduced rosmarinic acid accumulation in two mint lines, but no significant difference was found between photoperiods of 14 and 16 hours. The physiological age of the plant strongly influenced the accumulation of rosmarinic acid with the highest levels recorded in the vegetative state, and a significant reduction in the concentration of rosmarinic acid in the leaves in both the bud initiation and flowering stages in the mint lines. Cold stress, impacted over a six week period had no effect on rosmarinic acid production. A field study of the commercial chemotype 700B indicated that soil type plays an essential role in the accumulation of rosmarinic acid in the leaf tissue, probably due to retention of moisture which favours rosmarinic acid production. For producers and extractors, taking these factors into account would significantly increase rosmarinic acid accumulation in commercially high rosmarinic acid mint and increase the quality control of plant extracts for the natural products industry.

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“…Some authors (Burbott et al 1983, Voirin et al 1990, Amelunxen and Intert 1993, Voirin and Bayet 1996, Turner et al 2000 reported that young leaves contain larger amounts of the essential oil than older, fully developed leaves, on which the secerning forms (glands) and gland trichonomas start to degenerate. Our results are in agreement with these findings.…”

Section: Resultsmentioning

confidence: 99%

Qualitative properties of Mentha × piperita (L.) after application of the fungicide Hattrick DP-50

Vaverková¹,

Mistríková²,

Holla³

2009

Plant Soil Environ.

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The aim of this work was to study and verify the effect of the Hattrick DP-50 fungicide on quality and content of essential oil in Mentha × piperita (L.) HUDS. Cv. Perpeta (peppermint) during different developmental phases. The fungicide was applied approximately one month before the first collection. The results have shown that the phase of full bloom may be regarded as a period with the highest content of essential oil in herb and leaves of peppermint; its greatest amount was found in the youngest leaves. The content of menthol gradually increased to its maximum value in the full bloom phase, while that of menthone was decreasing. The treatment with Hattrick DP-50 did not influence the essential oil content and its changes during vegetation when compared to untreated plants. Similarly, the application of fungicide did not cause detectable changes in relative representation of main and secondary components of the essential oil.

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Effects of daylength on the monoterpene composition of leaves of Mentha x piperita

Cited by 101 publications

References 6 publications

Plantas medicinais: fatores de influência no conteúdo de metabólitos secundários

Plantas medicinais: fatores de influência no conteúdo de metabólitos secundários

Environmental Factors Affecting the Accumulation of Rosmarinic Acid in Spearmint (Mentha spicata L.) and Peppermint (Mentha piperita L.)

Qualitative properties of Mentha × piperita (L.) after application of the fungicide Hattrick DP-50

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