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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Non-glandular trichomes in Lamiaceae and Verbenaceae species: morphological and histochemical features indicate more than physical protection

Texto completo
Autor(es):
dos Santos Tozin, Luiz Ricardo ; de Melo Silva, Stefany Cristina ; Rodrigues, Tatiane Maria
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: NEW ZEALAND JOURNAL OF BOTANY; v. 54, n. 4, p. 446-457, 2016.
Citações Web of Science: 1
Resumo

Non-glandular trichomes are traditionally known as acting in the physical protection of plants against biotic and abiotic stresses, forming a mechanical barrier against low humidity, high light intensity and temperatures, and feeding and oviposition activities of insects. However, detailed studies involving morphology, histochemistry and ultrastructure of these epidermal appendages are lacking. We characterised the morphology and histochemistry of the non-glandular trichomes in three Lamiaceae and four Verbenaceae species and evidenced their involvement in the production, storage and/or liberation of biologically active substances. Samples of leaves were prepared according to standard methods for scanning and transmission electron microscopy. Histochemical tests were performed using fresh material. The combination of structural and ultrastructural studies and histochemical techniques allowed us to verify that the non-glandular trichomes of all studied species are comprised by living cells able to act in the synthesis, storage and/or liberation of biologically active compounds. This is the first work showing the production of compounds in non-glandular trichomes in Lamiaceae and Verbenaceae species. Our observations indicate that more than a physical protection, the non-glandular trichomes of these species participate in the chemical interaction of the plants with the environment, supplementing the work of the typically glandular trichomes. (AU)

Processo FAPESP: 13/07428-6 - Diversidade morfológica, histoquímica e ultraestrutural dos tricomas glandulares em Lantana camara L. (Verbenaceae) e relação entre morfotipo glandular e secreção
Beneficiário:Stefany Cristina de Melo Silva
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 08/55434-7 - Estruturas secretoras em espécies vegetais de cerrado: abordagens morfológica, química e ecológica
Beneficiário:Silvia Rodrigues Machado
Linha de fomento: Auxílio à Pesquisa - Programa BIOTA - Temático