Variations in the Leaf Oils of Three Species of Juniperus

Tatro, V. E.; Scora, Rainer W.; Vasek, Frank C.; Kumamoto, Junji

doi:10.1002/j.1537-2197.1973.tb10222.x

Cited by 17 publications

(9 citation statements)

References 9 publications

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“…The results obtained using pure cinnamon oil were consistent with previous reports and indicated loss of cinnamaldehyde with VTC processing (Wang et al 2005). Western juniper oil contained a number of components including a-pinene, sabinene, car-3-ene, p-cymene, camphor, linalool, terpinen-4-ol, and bornyl acetate that were similar to those reported previously in western juniper leaf and heartwood oils (Tatro et al 1973, Rudloff et al 1980, Duringer et al 2010).…”

Section: Gc-ms Analysissupporting

confidence: 90%

Potential for Using Essential Oils to Protect Viscoelastic Thermal Compression–Treated Hybrid Poplar

Scouse¹,

Kamke²,

Morrell³

2015

Forest Products Journal

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The potential for using pretreatment with cinnamon leaf oil or juniper foliage oil to improve the durability of viscoelastic thermal compression (VTC)-treated hybrid poplar was explored in a field termite test and a laboratory mold test. The addition of oils prior to VTC processing had variable effects on resistance to both mold and termite attack. Subsequent gas chromatography-mass spectroscopy assessment of residual oil components in VTC processed material suggested that the heating associated with the process was associated with substantial degradation of oil components that might help explain the lack of protective effect. The results suggest that further attempts to use essential oils to improve the durability of VTC processed materials must first explore less aggressive heating conditions to reduce the potential for thermal degradation of oil components while still achieving the attractive gains in physical properties associated with the process.

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Section: Gc-ms Analysissupporting

confidence: 90%

Potential for Using Essential Oils to Protect Viscoelastic Thermal Compression–Treated Hybrid Poplar

Scouse¹,

Kamke²,

Morrell³

2015

Forest Products Journal

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“…Variation in the volatile oil content of several other Juniperus species was shown by Tatro et al (11) and Adams (1). The data for juniper and spruce were all from field studies in which light and temperature were uncontrolled, but the data clearly show a tendency for the levels of terpenoids and volatile oils to fall during the summer months, increase through the fall, and remain high during the winter.…”

Section: Methodsmentioning

confidence: 88%

“…An annual variation in the levels of terpenes and volatile oils in the leaves of several gymnosperm species growing in the field has been reported (1,(10)(11)(12). In each case, the lipid levels are higher during the winter months than during the summer.…”

mentioning

confidence: 99%

Annual Variation in the Sterol Content of Digitalis purpurea L. Seedlings

Jacobsohn

Jacobsohn²

1976

Plant Physiol.

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Seedlings from a single lot of Digitalis purpurea L. seeds were germinated in batches over a period of 13 months. A total lipid extract was made which was resolved into esterified and unconjugated plus glycosylated sterol fractions. The amounts of sterol in each fraction and in the total were compared for seedlings germinated at different times of the year. The amount of esterified sterols reached a maximum value from March until June, and a low value from July until January. In Januay, a sharp increase began which lasted until March. Amounts of unconjugated and glycosylated sterols were elevated from March until June, low from July until October, and on the rise from November until March. These data correlate with an annual cycle in seed germination. The phase of maximum sterol content of seedlings is foOowed by a period of null germination.An annual variation in the levels of terpenes and volatile oils in the leaves of several gymnosperm species growing in the field has been reported (1, 10-12). In each case, the lipid levels are higher during the winter months than during the summer. In this paper, we describe the presence of an annual cycle in the sterol content of Digitalis seedlings germinated under controlled laboratory conditions. The cycle correlates with a seasonal fluctuation in the germination of Digitalis seeds, which we have observed for a number of years. The pattern of lipid variation observed in the gymnosperms and in Digitalis suggests an adaptive role which may enable plants to survive periods of low temperature. EXPERIMENTAL PROCEDURE MATERIALSSeeds of Digitalis purpurea var. gloxinoides were obtained from Burnett Bros, Inc., New York, N. Y. All reagents were analytical grade. Solvents were distilled prior to use except petroleum ether (boiling range 60 to 90C, Skelly Oil Co., Kansas City, Mo.) and diethyl ether. Cholesterol and stigmaster6l were obtained from Aldrich Chemical Co., and recrystallized from methanol until chromatographically pure. Sterols were separated and quantitated on a Glowall model 320 gas chromatograph equipped with a 183-cm glass column of 3.4-mm diameter, a flame ionization detector, and a Barber-Coleman recorder. The stationary phase was 3% OV-1 coated on Gas 1 This work was done in partial fulfillment of the requirements for the degree of Doctor of Philosophy at Bryn Mawr College by M. K. J.2 Present address: Department of Biology, Beaver College, Glenside, Pa. 19038. Chrom Q, 80 to 100 mesh (Applied Science, State College, Pa.); carrier gas was argon at a pressure of 14 p.s.i. Column temperature was 250 C, flash heater, 250 C, and the detector, 260 C, set at 360 v. METHODSThree hundred mg of Digitalis seeds (approximately 4000) were grown aseptically in covered Pyrex glass culture dishes, 10 cm in diameter and 8 cm deep. Seeds, stored in the dark at 23 C prior to germination, were sown under artificial white or green light. A layer, 0.5 cm deep, of clean, dry beach sand was deposited in each dish. Dishes were covered and sterilized in a gas oven at 160 C for...

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“…Most recently, Tatro et al (1973) in a study of the volatile oil of Juniperus occidentalis, J. osteostierma, and J. caliiornica concluded that "significant" seasonal variation was not occurring in these taxa, yet they present evidence that diurnal variations are occurring! In examination of the graphs (p. 238) it appears that there is a significant difference (P =.05) between the January and the June sample for sabinene in J. calijomica.…”

mentioning

confidence: 99%

Seasonal Variation in the Volatile Terpenoids of Juniperus Scopulorum (Cupressaceae)

Adams

Hagerman

1973

American J of Botany

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Fifteen trees in a natural population of Juniperus scopulorum Sarg. were sampled at 4‐week intervals throughout a year and the terpenoid constituents were extracted from the foliage. Several environmental variables were measured. Correlations with changes in volatile oil composition (computed as both relative percentages and as weights) were examined. Significant seasonal variations were discovered in both the relative percentage and weight data. These seasonal changes in the volatile oil composition were correlated with linear growth, temperature, yield of volatile oil, and dry weight of foliage. Seasonal variation in the terpenoids computed on a weight basis was found to be greater than the seasonal variation of the terpenoids computed as relative percents of the total oil. Evidence is presented which indicates that there is no stable period to sample on a weight basis, but sampling in the late fall and winter periods minimizes variation in the relative percentage data. The use of relative percentage data is thus encouraged for chemosystematic studies.

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Variations in the Leaf Oils of Three Species of Juniperus

Cited by 17 publications

References 9 publications

Potential for Using Essential Oils to Protect Viscoelastic Thermal Compression–Treated Hybrid Poplar

Potential for Using Essential Oils to Protect Viscoelastic Thermal Compression–Treated Hybrid Poplar

Annual Variation in the Sterol Content of Digitalis purpurea L. Seedlings

Seasonal Variation in the Volatile Terpenoids of Juniperus Scopulorum (Cupressaceae)

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