PARTE UTILIZADA=Used part: Brácteas florales, flores.

ACCIÓN FARMACOLÓGICA=Pharmacological action: Antinervino.

POSOLOGÍA=Posology: Se toma la infusión de la inflorescencia con la bráctea, como sedante. Infusión al 0,5-1%

COMPOSICIÓN QUÍMICA=Chemical composition: Contiene mucílagos, azúcares, taninos, glicósidos, flavonoides y cumarinas. Por su mucílago las plantas de tilo tienen propiedades emolientes. Tiene acción colerética y antiespasmódica atribuida a los flavonoides. Se le cita como ligeramente sedante, por lo que las flores de tilo son universalmente renombradas, en particular bajo la forma de la infusión (5,10g, en un litro de agua durante 1/4h). A pesar de ser esta una acción comprobada, no se sabe a qué componente químico se debe. El extracto provoca hipotensión y disminución de la tonicidad cardíaca.

ZONA GEOGRÁFICA=Geografical zone: Uruguay.

DIVERSIDAD GENÉTICA Y MEJORAMIENTO DE PLANTAS MEDICINALES= GENETIC DIVERSITY AND IMPROVEMENT OF MEDICINAL PLANTS:

Regeneration of plant epicuticular waxes was studied in 24 plant species by high-resoln. SEM.  According to their regeneration behavior, four groups could be distinguished: (i) regeneration occurs at all stages of development; (ii) regeneration occurs only during leaf expansion; (iii) regeneration occurs only in fully developed leaves; (iv) plants were not able to regenerate wax.  Wax was removed from the leaves with water-based glue and a liq. polymer, i.e. water-based polyurethane dispersion.  In young leaves these coverings could not be removed without damaging the leaves.  After a few days, waxes appeared on the surface of these polymer films, which still adhered to the leaves.  It is concluded that waxes move through the cuticle in a process similar to steam distn.  This hypothesis could be further substantiated in refined in vitro expts.  Wax isolated from Eucalyptus globulus was applied to a filter paper, subsequently covered with a liq. polymer and fixed onto a diffusion chamber filled with water.  The diffusion chamber was put into a desiccator.  After 8-10 days at room temp., crystals similar in dimensions and shape to in situ crystals appeared on the surface of the polyurethane film.  This indicates that waxes in mol. dimensions move together with the water vapor that permeates through the polymer membrane.  Based on these results, we propose a new and simple hypothesis for the mechanism of wax movement: the mols. that finally form the epicuticular wax crystals are moved in the cuticular water current.

Patente extraída del Chemical Abstracts=Extracted patent of the Database Chemical Abstracts:

Method for promoting germination of Tilia tomentosa seeds.      Yu, Xinxiao; Wang, Xiongbin; You, Xiangliang; Chen, Jihu; Jiao, Yizhi; Chen, Lihua; Niu, Jianzhi; Zhang, Zhenming; Zhu, Jiangang; Liu, Shuyan.  (Beijing Forestry University, Peop. Rep. China).    Faming Zhuanli Shenqing Gongkai Shuomingshu  (2009),     5pp.  CODEN: CNXXEV  CN  101433136  A  20090520  Patent  written in Chinese.    Application: CN  2008-10240193  20081218.  Priority: .  CAN 151:26138    AN 2009:633208    CAPLUS   (Copyright (C) 2010 ACS on SciFinder (R))  

The title method comprises: selecting mature Tilia tomentosa seeds and peeling, rapidly scalding and soaking, then soaking with gibberellin and cytokinin, and stacking with different temp. for germination.  The invention has the advantages of decreased time, high germination ratio, etc.

ÚLTIMOS AVANCES EN LA QUÍMICA Y ACTIVIDADES BACTERIOLÓGICAS EN LAS PLANTAS MEDICINALES= RECENT DEVELOPMENTS IN THE CHEMICAL AND BACTERIOLOGICAL ACTIVITIES IN MEDICINAL PLANTS

The essential oils of bracts and inflorescences of cultivated Tilia tomentosa and T. cordata from Greece and Romania, resp., were investigated.  Essential oils were obtained by hydrodistn. and analyzed using GC and GC/MS.  The oils of from the inflorescences of T. tomentosa and T. cordata were characterized by a high percentage of hydrocarbons (32.3% and 60.4%, resp.) with tricosane being the main component (21.5% and 31.3%).  Isocyclocitral (15.3%) and hotrienol (11.5%) were characterized as the main oxygenated monoterpenes of T. tomentosa and T. cordata inflorescences oils, resp.  Linalool (13.1%) and hexahydrofarnesyl acetone (17.7%) were the major constituents in bract oil of T. tomentosa, whereas the bract oil of T. cordata was characterized by the predominance of hydrocarbons (87.4%) with tricosane (32.2%) being the main constituent.

1) GONZALEZ, Matías ; LOMBARDO, Atilio ; VALLARINO, Aida. Plantas de la medicina vulgar del Uruguay. Montevideo : Talleres Gráficos, 1937. p. 121.  

2) ALONSO PAZ, Eduardo ; BASSAGODA, María Julia ; FERREIRA, Fernando. Yuyos : uso racional de las plantas medicinales. Montevideo : Fin de siglo, 1992, p. 96.

3) ALONSO PAZ, Eduardo ; BASSAGODA, María Julia ; FERREIRA, Fernando. Yuyos : uso racional de las plantas medicinales. 2da. ed. Montevideo : Fin de siglo, 2007, p. 130.

4) NEINHUIS, C.; KOCH, K.; BARTHLOTT, W. Movement and regeneration of epicuticular waxes through plant cuticles. Planta. 2001, vol.213, nº3, p.427-434.
 
5) FITSIOU, Ioanna, et al. Volatile constituents and antimicrobial activity of Tilia tomentosa Moench and Tilia cordata Miller oils.   Journal of Essential Oil Research. 2007, vol.19, nº2, p.183-185.