Abstract
Extracts of different polarities were obtained from plants of Lavandula stoechas subsp. luisieri and Lavandula pedunculata collected in the Center and Southwest Portugal. In order to have an idea on the possible classes of compounds present in each extract, they were subjected to a preliminary phytochemical screening through thin layer chromatography on silica gel plates, developed in appropriated mixtures of eluents and revealed with the specific reagents. Both taxa showed a hydrophilic and lipophilic chemical composition, being more diverse in L. stoechas subsp. luisieri. The micromorphology and histochemistry of secretory structures were also investigated by light and scanning electron microscopy. The common types of glandular trichomes, found in the Lamiaceae, peltate and capitate type I and II, were identified in each species as well as non-glandular stellate trichomes. In addition to these, L. pedunculata also presented capitate type III trichomes and still more two types of secretory trichomes: i) stellate type with both glandular and non glandular arms and ii) another type of capitate trichome, with a long and broad stalk formed by 2 cells, the basal is conical and much larger than the second, this similar to a ring, which supports a pluricelular head. These types of trichomes appear in the leaves but predominate in the flowers. The histochemical tests confirmed the existence of hydrophilic and lipophilic metabolites in glandular trichomes, except in the peltate hairs of the leaves of L. stoechas subsp. luisieri where only lipophilic secretions prevail.
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Claims 6
Claim · model-written summary
Both taxa had hydrophilic and lipophilic compositions, with greater diversity in L. stoechas subsp. luisieri.
- Taxon
- L. stoechas subsp. luisieri
Lavandula stoechas subsp. luisierie0 - Outcome
- hydrophilic and lipophilic chemical compositione0
- Direction
- more diversee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both taxa showed a hydrophilic and lipophilic chemical composition, being more diverse in L. stoechas subsp. luisieri”
Claim · model-written summary
Both species had peltate, capitate type I and II, and non-glandular stellate trichomes.
- Taxon
- Lavandula stoechas subsp. luisieriLavandula stoechas subsp. luisierit0
- Outcome
- peltate and capitate type I and IIe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The common types of glandular trichomes, found in the Lamiaceae, peltate and capitate type I and II, were identified in each species as well as non-glandular stellate trichomes”
t0“Lavandula stoechas subsp. luisieri and L. pedunculata”
Claim · model-written summary
L. pedunculata also had three additional secretory trichome types.
- Taxon
- L. pedunculata
Lavandula pedunculatae0 - Outcome
- capitate type III trichomes and still more two types of secretory trichomese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L. pedunculata also presented capitate type III trichomes and still more two types of secretory trichomes: i) stellate type with both glandular and non glandular arms and ii) another type of capitate trichome, with a long and broad stalk formed by 2 cells, the basal is conical and much larger than the second, this similar to a ring, which supports a pluricelular head”
Claim · model-written summary
These trichomes occurred in leaves and predominated in flowers.
- Taxon
- L. pedunculataLavandula pedunculatat0
- Outcome
- trichomes appear in the leaves but predominate in the flowerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These types of trichomes appear in the leaves but predominate in the flowers”
t0“L. pedunculata”
Claim · model-written summary
Glandular trichomes contained hydrophilic and lipophilic metabolites.
- Taxon
- Lavandula stoechas subsp. luisieriLavandula stoechas subsp. luisierit0
- Outcome
- hydrophilic and lipophilic metabolites in glandular trichomese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The histochemical tests confirmed the existence of hydrophilic and lipophilic metabolites in glandular trichomes”
t0“Lavandula stoechas subsp. luisieri and L. pedunculata”
Claim · model-written summary
Leaf peltate hairs of L. stoechas subsp. luisieri predominantly contained lipophilic secretions.
- Taxon
- L. stoechas subsp. luisieriLavandula stoechas subsp. luisierie0
- Organ / stage
- leavese0
- Outcome
- only lipophilic secretions prevaile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“except in the peltate hairs of the leaves of L. stoechas subsp. luisieri where only lipophilic secretions prevail”