Abstract
Anatomical and histochemical investigations of Sphagneticola trilobata (L.) Pruski, Asteraceae, secretory structures in leaves and stems and the seasonal variation of essential oils were carried out. Histochemical techniques enabled the specific location of the essential oil accumulation in the internal (canals) and external structures (trichomes). Histochemical analysis showed that the secretory trichomes produced steroids. The highest yield was obtained from plants collected in winter, when it was registered low temperature and precipitation. The essential oil was characterized by high percentage of hydrocarbon sesquiterpenes, hydrocarbon monoterpenes and low levels of oxygenated sesquiterpenes. The major components were germacrene D (11.9-35.8%), α-phellandrene (1.4-28.5%), α-pinene (7.3-23.8%), E-caryophyllene (4.6-19.0%), bicyclogermacrene (6.0-17.0%), limonene (1.8-15.1%) and α-humulene (4.0-11.6%). The percentage of most of the individual constituents present in S. trilobata essential oil changed significantly during the months.
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Claims 12
Claim · model-written summary
Essential oil accumulated in canals and trichomes.
Not reportedTaxon
Verbatim
e0“Histochemical techniques enabled the specific location of the essential oil accumulation in the internal (canals) and external structures (trichomes).”
t0“Sphagneticola trilobata”
Claim · model-written summary
Secretory trichomes produced steroids.
Not reportedTaxon
Verbatim
e0“Histochemical analysis showed that the secretory trichomes produced steroids.”
t0“Sphagneticola trilobata”
Claim · model-written summary
Essential oil yield was highest in winter.
Not reportedTaxon
Verbatim
e0“The highest yield was obtained from plants collected in winter, when it was registered low temperature and precipitation.”
t0“Sphagneticola trilobata”
Claim · model-written summary
Essential oil had high hydrocarbon sesquiterpenes and monoterpenes and low oxygenated sesquiterpenes.
- Outcome
- high percentage of hydrocarbon sesquiterpenes, hydrocarbon monoterpenes and low levels of oxygenated sesquiterpenese0
Not reportedTaxon
Verbatim
e0“The essential oil was characterized by high percentage of hydrocarbon sesquiterpenes, hydrocarbon monoterpenes and low levels of oxygenated sesquiterpenes.”
t0“Sphagneticola trilobata”
Claim · model-written summary
Germacrene D was a major oil component.
Not reportedTaxon
Verbatim
e0“The major components were germacrene D (11.9-35.8%), α-phellandrene (1.4-28.5%), α-pinene (7.3-23.8%), E-caryophyllene (4.6-19.0%), bicyclogermacrene (6.0-17.0%), limonene (1.8-15.1%) and α-humulene (4.0-11.6%).”
t0“Sphagneticola trilobata”
Claim · model-written summary
α-phellandrene was a major oil component.
Not reportedTaxon
Verbatim
e0“α-phellandrene (1.4-28.5%)”
t0“Sphagneticola trilobata”
Claim · model-written summary
α-pinene was a major oil component.
Not reportedTaxon
Verbatim
e0“α-pinene (7.3-23.8%)”
t0“Sphagneticola trilobata”
Claim · model-written summary
E-caryophyllene was a major oil component.
Not reportedTaxon
Verbatim
e0“E-caryophyllene (4.6-19.0%)”
t0“Sphagneticola trilobata”
Claim · model-written summary
Bicyclogermacrene was a major oil component.
Not reportedTaxon
Verbatim
e0“bicyclogermacrene (6.0-17.0%)”
t0“Sphagneticola trilobata”
Claim · model-written summary
Limonene was a major oil component.
Not reportedTaxon
Verbatim
e0“limonene (1.8-15.1%)”
t0“Sphagneticola trilobata”
Claim · model-written summary
α-humulene was a major oil component.
Not reportedTaxon
Verbatim
e0“α-humulene (4.0-11.6%)”
t0“Sphagneticola trilobata”
Claim · model-written summary
Most individual constituent percentages changed across months.
- Taxon
- S. trilobata
.jpg?width=60)
Sphagneticola trilobatae0 - Outcome
- percentage of most of the individual constituentse0
- Direction
- changede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“The percentage of most of the individual constituents present in S. trilobata essential oil changed significantly during the months.”