Sesquiterpenoids from the essential oil of

Kapadia, V.H.; Naik, V.G.; Wadia, M. S.; Dev, Sukh

doi:10.1016/s0040-4039(01)89576-9

Cited by 46 publications

(44 citation statements)

References 15 publications

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“…Rotundone is a sesquiterpene originally isolated from the tubers of the grassy weed nutgrass ( Cyperus rotundus ) by Kapadia et al (). More recently, rotundone has been found in various plants and plant products (Wood et al ), such as white and black peppers ( Piper nigrum ), marjoram ( Origanum majorana ), oregano ( Origanum vulgare ), geranium ( Pelargonium alchemilloides ), rosemary ( Rosmarinus officinalis ), saltbush ( Atriplex cinereal ), basil ( Ocimum basilicum ), thyme ( Thymus vulgaris ) and grape and wine ( Vitis vinifera L. cv.…”

Section: Introductionmentioning

confidence: 99%

Can a certain concentration of rotundone be undesirable in Duras red wine? A study to estimate a consumer rejection threshold for the pepper aroma compound

Geffroy

Descôtes

Serrano

et al. 2017

Australian Journal of Grape and Wine Research

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Background and Aims: Rotundone is responsible for peppery aroma in wine. This note is not appreciated by all consumers, which indicates that rotundone might be considered as a taint above a certain concentration. The current study aimed at determining a consumer rejection threshold for rotundone in Duras red wine. Methods and Results: Consumers (n = 62) received pairs of samples consisting of a base wine and the base wine spiked with an ascending concentration of rotundone and were asked to indicate which sample they preferred. Anosmic respondents detected through triangle tests represented 31% of the panellists. For these panellists, the wine spiked at the lowest concentration was significantly rejected suggesting that rotundone might induce a trigeminal sensation and/or is involved in molecular mechanisms of flavour reduction. For remaining panellists, we were not able to determine any consumer rejection threshold. We identified three clusters of consumer profiles. The first cluster preferred a moderate concentration of rotundone and rejected a high concentration. The second cluster, mainly composed of young consumers, preferred the Control. The last group appreciated peppery wines especially at high concentration. Conclusions: The response of consumers to rotundone is complex, and peppery notes are perceived positively or in a neutral manner by most consumers with the exception of young panellists. Significance of the Study: Our results may assist grape growers producing Duras and other cultivars, where rotundone makes a sensory contribution, to adapt their products to consumer profiles. They also open new fields of investigation into mechanisms involved in specific anosmia to rotundone.

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Section: Introductionmentioning

confidence: 99%

Can a certain concentration of rotundone be undesirable in Duras red wine? A study to estimate a consumer rejection threshold for the pepper aroma compound

Geffroy

Descôtes

Serrano

et al. 2017

Australian Journal of Grape and Wine Research

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“…The differential degree of inhibitory (5, 10, 15, 20 and 25%) effect on the growth of rice cultivars may be due to the presence of various allelochemicals at different levelin both the weed extracts. Previous phytochemical studies on C. rotundus revealed the presence of alkaloids, flavonoids, tannins, starch, glycosides and furochromones, and many novel sesquiterpenoids (Raut et al, 2006;EL-Habashy et al, 1989;Kapadia et al, 1967;Jeong et al, 2000;Sayed et al, 2007;Xuet al, 2008). The herb C.dactylon contains beta sitosterol, beta-carotene, vitamin C, palmitic acid, andtriterpenoids.…”

Section: Cynodon Dactylonmentioning

confidence: 97%

Allelopathic Potential of Cyperus Rotundus L. And Cynodan Dactylon L. On Germination and Growth Responses of Some Rice Cultivars

Kavitha

2015

krj

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Weeds are enemies to the crop plants and have harmful effects on agricultural crops due to several factors such as competition for space, light and nutrients and allelopathy. In the present study,various concentrations (0,5,10,15,20 and 25%) of whole plant aqueous extractsof weeds, Cyperus rotundusL.( Purple nut sedge) and Cynodan dactylon(L.) Pers. (Bermuda grass) were tested for assessing their allelopathic potential on seed germination and seedling growth of some rice (Oryza sativa L.) cultivars i.e.ADT-36,BPT5204 and IR-20 using pot culture experiments. The experimental results revealed that all the concentrations of both the weed extracts had inhibition on germination percentage, seedling length, number of,dry weight and chlorophyll contents of 15 day old seedlings of all the three rice cultivars and the inhibitory effect of the extracts was concentration dependent. However, at 5% of C. rotundus and10% of C. dactylon extracts did notaffect seed germination of IR-20 . Among the rice cultivars,the higher degree of growth inhibition was observed in ADT-36followed by BPT-5204 and IR-20 . The weed C.rotundusexhibited more intense on growth suppression of rice cultivars thanC.dactylon.

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“…1), and sugetriol triacetate, which were isolated from the essential oil (Hikino et al . 1965, 1966, 1968b; Kapadia et al . 1967) and were found to act as allelochemicals on the surrounding plants (Komai 1982).…”

Section: Introductionmentioning

confidence: 99%

Plant growth inhibitors: Patchoulane‐type sesquiterpenes from Cyperus rotundus L.

Morimoto

Komai

2005

Weed Biology and Management

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Two sesquiterpene ketones, cyperotundone and α -cyperone, were isolated from dried tubers of purple nutsedge ( Cyperus rotundus L.) as major constituents: ≈ 0.26% and 0.1% of dried tuber, respectively. These allelochemicals affect plant growth, but we consider that these terpenoids undergo modification when they are released into the rhizosphere from the donor plant. For the structure-activity relationship study, cyperotundone was oxidized with selenium dioxide in acetic acid to 4-patchoulene-2,3-dione and 4-patchoulene-2,3,6-trione. Subsequent hydrogenation of 4-patchoulene-2,3-dione and 4-patchoulene-2,3,6-trione gave hydroxylated derivatives, cyperotundon-2-ol and 3-hydroxy-4-patchoulene-2,6-dione, respectively. 4-Patchoulene-2,3-dione inhibited the hypocotyl growth of lettuce seedlings but promoted radicle elongation at 0.1 − 2 mg L − 1 concentration without chlorosis. Moreover, this radicle elongation recovered with the addition of galactose and was not antagonized by gibberellin A 3 . The effect of 4-patchoulene-2,3,6-trione showed a similar chlorosis, caused by 3,6,9-sugetriol triketone, against lettuce seedlings. These ketones did not show the radicle elongation.

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Sesquiterpenoids from the essential oil of

Cited by 46 publications

References 15 publications

Can a certain concentration of rotundone be undesirable in Duras red wine? A study to estimate a consumer rejection threshold for the pepper aroma compound

Can a certain concentration of rotundone be undesirable in Duras red wine? A study to estimate a consumer rejection threshold for the pepper aroma compound

Allelopathic Potential of Cyperus Rotundus L. And Cynodan Dactylon L. On Germination and Growth Responses of Some Rice Cultivars

Plant growth inhibitors: Patchoulane‐type sesquiterpenes from Cyperus rotundus L.

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