Microclimatic buffering on medicinal and aromatic plants: A review

Thakur, Meenakshi; Kumar, Rakesh

doi:10.1016/j.indcrop.2020.113144

Cited by 18 publications

(16 citation statements)

References 156 publications

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“…In this study, plants grown under full sun showed higher thickness of palisade parenchyma (51.72 µm) and spongy parenchyma (169.12 µm) than under nets conditions (48.31 and 77.86 µm, respectively) (Table 3). Parenchyma cells of plants grown under nets conditions are comparatively less thick as compared with full sun (THAKUR & KUMAR, 2021). This reduction in the thickness of the leaves of shaded plants is possibly due to the difference in the distribution and consumption of photoassimilates for leaf expansion, as observed in this study the leaf area under net (44.17 cm 2 ) was higher compared to full sun (17.23 cm 2 ) (Table 2).…”

Section: Ribeiro Et Alsupporting

confidence: 55%

“…The highest dry weights (leaf, stem, root and total) were obtained with use of shade net compared to full sun. Excess of solar radiation can be considered as a stress factor to reduce the physiological and morphological parameters of plants (THAKUR & KUMAR, 2021). The plants grown with use of shade net (42.64 g) showed a gain of 180% in LDW relative to the crop under full sun (23.68 g), while 50 and 70% shading (Aluminet or black net) enabled even greater gains in relation to 30%.…”

Section: Growth Analysismentioning

confidence: 99%

“…Still according to these authors, the adaptation of the plant's morphology, anatomy and physiological functions for changes in abiotic can influence the accumulation of secondary metabolites. Radiation affects the assimilation of carbon and; consequently, the production of essential oils in plants, as the synthesis of these oils involves biochemical pathways from the primary metabolism (THAKUR & KUMAR, 2021). Therefore, improving the yield and medicinal properties of plants can be achieved through appropriate adjustments to the amount of light (LI et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Light intensities alter growth and essential oil of patchouli under shade nets

et al. 2022

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Pogostemon cablin (Blanco) Benth. is an aromatic species popularly known as patchouli. The essential oil rich in patchoulol extracted from leaves is used by the pharmaceutical industries. The objective was to investigate the effects of shade nets and shading intensities on P. cablin growth, anatomy, chemical composition and essential oil content. The experiment was conducted with two types of shade nets (black and Aluminet), three light intensities (30, 50, and 70% shading) and full sun. The different light intensities influenced the growth and the essential oil yield, and chemical composition. Patchouli plants grown in an environment with shading showed higher values for the leaf, stem, root ant total dry weights compared to full sun. At 50% of shading, Aluminet provided gain in stem and total dry weights. Aluminet and black net at 50 and 70% of shading enhance essential oil yield. Patchoulol and pogostol contents were higher under full sun, and, black net and Aluminet at 50% shading. The environment for patchouli cultivation can be improved by use shade nets, especially with Aluminet at 50% of shading.

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Section: Ribeiro Et Alsupporting

confidence: 55%

Section: Growth Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Light intensities alter growth and essential oil of patchouli under shade nets

et al. 2022

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“…A study correlating the yields of EO of P. umbellatum and photosynthetic activities described that when cyophyte plants, such as P. gaudichaudianum , are subjected to high irradiance, chlorosis and necrosis usually occur with the photodegradation of chromopigments, leading to reduced photosynthesis and biomass production [ 86 ]. In addition to this mechanism, there is a decrease in EO accumulation through evaporation provided by increases in gas exchanges, temperature, stomatal conductance and the CO 2 assimilation rate [ 55 , 84 , 87 , 88 , 89 ].…”

Section: Resultsmentioning

confidence: 99%

Advanced Chemophenetic Analysis of Essential Oil from Leaves of Piper gaudichaudianum Kunth (Piperaceae) Using a New Reduction-Oxidation Index to Explore Seasonal and Circadian Rhythms

Ramos

Costa-Oliveira

Candido-Fonseca

et al. 2021

Plants

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The aromatic species Piper gaudichaudianum Kunth (Piperaceae) is widely used in Brazil for medicinal and ritualistic applications. In the current study, chemophenetic patterns were realized across season and circadian rhythm based on the chemical profile of essential oils (EOs) from leaves. Hydrodistilled essential oils were analyzed by GC-MS and GC-FID, and a new calculation of metabolite oxidation level, averaged for each individual molecule component of the EO, was used to explore the patterns of metabolism/biosynthesis. This new index used an intermediate calculation, the ‘weighted average redox standard’ (SRO), to enable a value for mixtures of metabolites to be generated, the ‘general mixture redox index’ (GMOR). The indices were subjected to a proof-of-concept approach by making comparison to outcomes from multivariate analyses, i.e., PCA and HCA. Chemical analysis demonstrated that the essential oils were dominated by sesquiterpenes, constructed of 15 classes of compound (C-skeletons), and 4 C-skeletons were recognized in the monoterpene group, giving a total of 19. The variation of chemical profiles was distinct at different phenological stages, but stronger chemical variation was evident between day and night as compared to season. Furthermore, due to comprehensive sampling across different regions, nine chemotypes were recognized, including those previously reported. The SRO and GMRO indices demonstrate that phenological variation of chemistry is mainly an outcome of redox fluctuations in terpene biosynthesis, changing from day to night. These indices also corroborate that chemical diversity is increased with oxidative metabolism. Lastly, the current study demonstrates pronounced phenotypic plasticity in P. gaudichaudianum, which makes it a suitable candidate to help further our understanding of chemophenetics and chemical ecology.

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“…Furthermore, the aromatic species included in the field experiment are shorter in height and with lower growth velocity than the tomato plants, which also could have affected the efficiency of the aromatic plants as emitters of volatiles and consequently in the repellence of adults of B. tabaci. It has also been reported that the production of VOC in the aromatic plants is related to the amount and intensity of light (Ascrizzi et al, 2018;Thakur and Kumar, 2020).…”

Section: Population Density Of B Tabaci In the Fieldmentioning

confidence: 97%

RESPONSE OF Bemisia tabaci Genn TO THE ASSOCIATION TOMATO−AROMATIC PLANT

Herrera-Gorocica¹,

Ruíz-Sánchez²,

Ballina-Gómez³

et al. 2022

agro

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The silverleaf whitefly (Bemisia tabaci) is the most harmful pest for vegetables in tropical zones. One alternative for its ecological management is the use of repellent aromatic plants. The hypothesis of this study is that the aromatic plants that diminish the attraction of B. tabaci to tomato have the capacity to prevent the infestation of this pest in the tomato crop when an intercropping system of tomato-aromatic plant is established. The objective of this study was to evaluate by means of the technique of olfactometry, the response of B. tabaci to the volatiles emitted by the crushed leaves of tomato and by the combination tomato + aromatic plant. The aromatic plants with highest activity in the olfactometry tests were intercropped in a tomato crop in the field. In the bioassays of olfactometry, a significant decrease was observed in the attraction of B. tabaci to crushed leaves of tomato + some aromatic plants compared with the attraction to tomato alone. The repellence indices (IR) showed that the aromatics Lavandula angustifolia Mill. (IR, 0.1), Petiveria alliacea L. (IR, 0.48), Petroselinum crispum Mill. (IR, 0.28) and Thymus vulgaris (IR, 0.5) had the greatest effect as repellent of adults. By integrating these aromatic species through intercropping in the tomato field crop, no significant difference was observed in the population density of eggs and adults of B. tabaci in the tomato foliage in regard to what was observed in the control (only tomato). The incidence and severity of viral symptoms did not decrease from the presence of the aromatic species intercropped in the tomato crop.

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Microclimatic buffering on medicinal and aromatic plants: A review

Cited by 18 publications

References 156 publications

Light intensities alter growth and essential oil of patchouli under shade nets

Light intensities alter growth and essential oil of patchouli under shade nets

Advanced Chemophenetic Analysis of Essential Oil from Leaves of Piper gaudichaudianum Kunth (Piperaceae) Using a New Reduction-Oxidation Index to Explore Seasonal and Circadian Rhythms

RESPONSE OF Bemisia tabaci Genn TO THE ASSOCIATION TOMATO−AROMATIC PLANT

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