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Light-dependent formation of glandular trichomes and monoterpenes in thyme seedlings

Tipo de material: TextoTextoSeries ; PhytoChemistry, 28(3), p.741-744, 1989Trabajos contenidos:
  • Yamaura, T
  • Tanaka, S
  • Tabata, M
Tema(s): Recursos en línea: Resumen: The production of monoterpenes could be induced by irradiating the etiolated seedlings of thyme (Thymus vulgaris)with light. The yield of thymol, the main constituent of the essential oil, increased with increasing time of irradiation. The formation of peltate glandular trichomes (PGTS)occurred prior to monoterpene accumulation in both green and etiolated seedlings. GC analyses of the isolated PGTs showed that monoterpenes were accumulated mostly in the PGTs of cotyledons and primary leaves in green seedlings. Furthermore, the amount of monoterpenes in various organs of the seedlings was closely correlated to the number of PGTS. These results suggested that the primary site of monoterpene accumulation are the PGTS, the formation of which is a prerequisite for the accumulation of essential oils in this plant.
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The production of monoterpenes could be induced by irradiating the etiolated seedlings of thyme (Thymus vulgaris)with light. The yield of thymol, the main constituent of the essential oil, increased with increasing time of irradiation. The formation of peltate glandular trichomes (PGTS)occurred prior to monoterpene accumulation in both green and etiolated seedlings. GC analyses of the isolated PGTs showed that monoterpenes were accumulated mostly in the PGTs of cotyledons and primary leaves in green seedlings. Furthermore, the amount of monoterpenes in various organs of the seedlings was closely correlated to the number of PGTS. These results suggested that the primary site of monoterpene accumulation are the PGTS, the formation of which is a prerequisite for the accumulation of essential oils in this plant.

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