| Beide Seiten der vorigen Revision
Vorhergehende Überarbeitung
Nächste Überarbeitung
|
Vorhergehende Überarbeitung
|
drepanolejeunea_madagascariensis_steph._grolle [2017/08/26 15:00]
andreas |
drepanolejeunea_madagascariensis_steph._grolle [2017/08/26 15:16] (aktuell)
andreas |
| **Drepanolejeunea madagascariensis (Steph.) Grolle** - syn.Drepanolejeunea mauritiana Tixier; Leptolejeunea madagascariensis Steph. | Drepanolejeunea madagascariensis (Steph.) Grolle - syn.Drepanolejeunea mauritiana Tixier; Leptolejeunea madagascariensis Steph. |
| |
| Small, leafy, aromatic (pleasant, sweet, warm, woody-spicy, and herbaceous fragrance, slightly reminiscent of dill), epiphyllous liverwort, native to Reunion Island. | Small, leafy, aromatic (pleasant, sweet, warm, woody-spicy, herbaceous, slightly reminiscent of dill), epiphyllous liverwort, native to Reunion Island.; recognizable by the bifid underleaves on the ventral side of the stem and by the presence of celles with oil bodies (ocelli); ocelli either dispersed in the leaf (30-44µm long) or a series of 4-5 ocelli (40-55µm long) forming a line at the basis of the leaf; ocelli usually easy to recognize, as they are larger in size compared to the surrounding cells. Herbarium specimens tend to lose the oil bodies. \\ |
| |
| "...recognizable by the bifid underleaves on the ventral side of the stem and by the presence of oil bodies...In leafy liverworts, the cells containing these oil bodies are called ocelli. These ocelli are either dispersed in the leaf (30 - 44 mm long) or a series of 4 - 5 ocelli (40 - 55 mm long) form a line at the basis of the | | {{:beta_phellandrene.jpg| β-phellandrene}} \\ β-phellandrene \\ //(fresh spicy)// | {{:dillether.jpg| dill ether}} \\ dill ether \\ //(dill-like)// | {{:limonene.jpg|limonene}} \\ limonene \\ //(citrus turpentine)// | {{:p_menthen9ol.jpg|}} \\ p-menth-1-en-9-ol (R=H, //mild fruity//) \\ p-menth-1-en-9-yl acetate (R=Ac, //fruity herbaceous//) | |
| leaf. For this species, the ocelli are usually easy to recognize, as they are larger in size | |
| when compared to the surrounding cells. The plant, when dried in herbarium collections, tends to lose these oil bodies. \\ | |
| |
| |{{:beta_phellandrene.jpg| β-phellandrene }} \\ β-phellandrene \\ //(fresh spicy)//| {{:dillether.jpg|dill ether}} \\ [[http://www.leffingwell.com/chirality/dillether.htm|dill ether]] \\ //(dill-like)//| {{:limonene.jpg|limonene}} \\ limonene \\ //(citrus turpentine)// | {{:p_methen9ol.jpg}} \\ p-menth-1-en-9-ol (R=H, //mild fruity//) \\ p-menth-1-en-9-yl acetate (R=Ac, //fruity herbaceous//) | | "The woody-spicy note, in particular, which contributes considerably to the overall olfactive impression, may be attributed to the great prevalence of β-phellandrene (8.8-11.6%) as well as to three other minor monoterpenes (β-pinene, α-phellandrene, and terpinen-4-ol) and six minor sesquiterpene hydrocarbons (α-cubebene, α-copaene, β-bourbonene, β-elemene, germacrene D, bicyclogermacrene, and δ-cadinene). The herbaceous effect may be attributable to a combination of limonen-10-ol (< 0.1-0.3%), p-menth-1-en-9-yl acetate (0.7-1.5%), and [[http://www.leffingwell.com/chirality/dillether.htm|dill ether]] (8.5-16.6%). The latter, known to be one of the primary odorants of dill herb (Anethum graveolens), can be assumed to be the key odorant of this liverwort's fragrance, responsible for the peculiar anisic note with a dill-like impression. Interestingly, the three samples of D. madagascariensis exhibited a headspace composition with a significant level of limonene (10.5-14.7%) and p-menth-1-en-9-ol (28.8-43.5%). Both have been reported to be precursors of dill ether in Anethum graveolens. Therefore, it would not be surprising if D. madagascariensis and A.graveolens had the same biosynthetic pathway for dill ether." \\ |
| | |
| The woody-spicy note, in particular, which contributes considerably to the overall olfactive impression, may be attributed to the great prevalence of β-phellandrene (8.8-11.6%) as well as to three other minor monoterpenes (β-pinene, α-phellandrene, and terpinen-4-ol) and six minor sesquiterpene hydrocarbons (α-cubebene, α-copaene, β-bourbonene, β-elemene, germacrene D, bicyclogermacrene, and d-cadinene). The herbaceous effect may be attributable to a combination of limonen-10-ol (< 0.1-0.3%), p-menth-1-en-9-yl acetate (0.7-1.5%), and dill ether (8.5-16.6%). The latter, known to be one of the primary odorants of dill herb (Anethum graveolens), can be assumed to be the key odorant of this liverwort's fragrance, responsible for the peculiar anisic note with a dill-like impression. Interestingly, the three samples of D. madagascariensis exhibited a headspace composition with a significant level of limonene (10.5-14.7%) and p-menth-1-en-9-ol (28.8-43.5%). Both have been reported to be precursors of dill ether in Anethum graveolens. Therefore, it would not be surprising if D. madagascariensis and A.graveolens had the same biosynthetic pathway for dill ether." \\ | |
| [Gauvin‐Bialecki, Anne, et al. "Fragrant Volatile Compounds in the Liverwort Drepanolejeunea madagascariensis (Steph.) Grolle: Approach by the HS‐SPME Technique." Chemistry & biodiversity 7.3 (2010): 639-648] | [Gauvin‐Bialecki, Anne, et al. "Fragrant Volatile Compounds in the Liverwort Drepanolejeunea madagascariensis (Steph.) Grolle: Approach by the HS‐SPME Technique." Chemistry & biodiversity 7.3 (2010): 639-648] |
| |
| |
